Nanostructured materials for thermal spraying

 

(57) Abstract:

The invention relates to methods for nanostructured materials that can be used when applying nanostructured coatings in standard installations of thermal spraying. In one embodiment, the nanostructured feedstock contains spherical agglomerates obtained by re-processing of powders. In another embodiment, a thin dispersion of nanoparticles directly Inuktitut in the torch or plasma devices for thermal spraying to obtain nanostructured coatings. In another embodiment, liquid ORGANOMETALLIC chemical precursors (pre-connection) directly Inuktitut in the plasma torch device for thermal spraying, resulting in the synthesis of nanoparticles, melting and hardening is carried out in one operation. In these methods use ultrasound to the disintegration of the newly synthesized agglomerates of particles of a dispersion of nanoparticles in a liquid medium and spraying liquid precursor. The technical result of the invention is the creation of nanostructured materials consisting of ultrafine grains and particles, suitable for thermal spraying. 9 C. and 13 C.p. f-crystals, 6 in the surrounding area, the present invention relates to nanostructured raw materials used in the deposition of high quality nanostructured coatings by thermal spraying process.

A brief description of the prior art

Long been established that materials with fine microstructure are technologically attractive properties. In the last few years have determined the class submicrocrystalline materials consisting of ultrafine grains or particles. These materials are called "nanostructured materials". Nanostructured materials are characterized by a high proportion of the atoms of the materials remaining at the grain boundaries or particles. For example, when the grain size in the range of five nanometers, about half of the atoms in nanocrystalline or nanophase solids remain at the boundary surface of the grains or particles.

Although research in the field of nanostructured materials recently focused on the synthesis and processing of nanostructured bulk materials, there is a growing interest in nanostructured coatings including thermal barriers, hard and superhard coatings.

Nanostructured bulk materials with the required MegaFon is cteristic in a wide range of structural applications.

Since the end of 1980-ies were particularly active in the study of nanostructured materials in Rutgersson University and Connecticut College. Progress has been made in the synthesis of 1) nanostructured metal powders by the method of reaction in organic solution (OSR), the method of reaction in aqueous solution (ASR), 2) nanostructured cermet powders (cermet) through the spray conversion processing, and 3) nanostructured powders by the method vasocongestion processing. Also, progress has been made in the seal nanostructured powders by methods of solid-phase and liquid-phase sintering (for bulk materials) while maintaining the desired nanostructures.

Recently for the synthesis of nanostructured powders used three different ways, namely: 1) how reactions in organic solution (OSR) and reactions in aqueous solution (ASR) for synthesizing nanostructured metal powders, such as nanostructured Cr3C2/Ni powders; 2) the way the spray conversion processing (SPR) for synthesizing nanostructured cermet powders (cermet, for example powders of tungsten/carbon/cobalt and Fe3Mo

OSR and ASR methods of nanostructured metals and alloys include three stages: 1) preparation of organic or aqueous solution of the mixed chlorides of metals; 2) reductive decomposition of the original solution of the metal hydride to obtain a colloidal solution of metal components; and 3) filtering, washing and drying with subsequent gas-phase carburization under conditions regulated activity of carbon and oxygen to obtain the desired nanodispersions of carbide phases in the metallic matrix phase.

This procedure is used for synthesizing a variety of nanostructured metallogidridnyh powders, including nanostructured CR3WITH2/NiCr powders used in thermal spraying corrosion-resistant hard coatings. Adding at the stage of final rinse small amounts of organic passivator, such as a solution of paraffin in hexane, provides protection powder with a highly developed surface from the ignition when drying and exposure to air. Thus obtained powders are loose, loosely agglomerated. Under used in Montesilvano nanostructured metal-ceramic composite powders consists of three phases: 1) preparation of an aqueous solution of a mixture of salts of the constituent elements; 2) spray drying of the starting solution with the homogeneous precursor powder; and 3) conversion in the fluidized bed (recovery or carburization) of the precursor powder to the desired nanostructured cermet powder. SCP method is used to obtain nanostructured WC/Co, Fe3Mo3C/Fe and other similar materials. Particles can be in the form of hollow spherical shells. After synthesizing powders usually passivated to eliminate excessive oxidation when exposed to air.

Currently GCP method is the most flexible process used for the synthesis of experimental quantities of nanostructured metal and ceramic powders. A characteristic feature of this process is its ability to form loosely agglomerated nanostructured powders, which can be synthesized at relatively low temperatures.

In the scenario of condensation in a current of inert gas (IGC) GCP method used evaporated source to create the powder particles, convective transported to the cold substrate and is going to last. The nanoparticles are formed in the area of thermalization (slow to warm is it cold atoms of inert gas (typically at a pressure of 1-20 mbar) in the camera. Ceramic powders are usually obtained through a two-stage process: evaporation vapor source of the metal or, preferably, negocis metal with a high vapor pressure and subsequent slow oxidation to obtain particles of the desired nanostructured ceramic powders.

In a variant of chemical vapour deposition (CVC) GCP method using a tubular reactor for decomposition of the precursor carrier gas and the formation of a continuous stream of clusters or nanoparticles in the pipe reactor. For successful CVC processing critical aspects are 1) low concentration of the precursor in the carrier gas; 2) the rapid expansion of gas flow in a uniformly heated tube reactor; 3) rapid cooling produced in the gas phase clusters or nanoparticles as they exit from the pipe reactor; and 4) low pressure in the reaction chamber.

Particles obtained nanostructured ceramic powder loosely agglomerated, as in the IGC process, and demonstrate ability to sintering at a low temperature. This distinguishes them from ultrafine powders obtained by known methods flaring at ambient pressure and plasma-arc machining, powder and much more high temperature sintering. CVC method for synthesizing nanostructured powders of various ceramic materials which cannot easily be obtained through the IGC process due to their high melting temperatures and/or low vapor pressure. Examples are nanostructured powders of SICxNywith lots of suitable ORGANOMETALLIC precursors, such as hexamethyldisilazane (HMDS). On the real composition of the obtained powder is strongly influenced by the choice of carrier gas. So, HMDS/H2O, HMDS/H2and HMDS/NH3give nanostructured ceramic powders with compositions close to the SiO2, SiC and Si3N4respectively.

Currently, in industrial practice, the powders used for the deposition of metallic, ceramic or composite coatings by thermal spraying or plasma deposition, contain particles with a diameter ranging from 5 to 50 microns. Within a short residence time in the flame or plasma particles are rapidly heated with the formation of the spray jet is partially or completely molten drops. When these particles reach the surface of the substrate, creates a huge impact force, promote strong adhesion of the particles to under the Oh in the range of 25 microns to several millimeters are formed at relatively high deposition rate.

Typically, conventional powders used when applying coatings by thermal spraying, get through a series of steps, including grinding in a ball mill, mechanical mixing, reaction at high temperature and sometimes the spray drying using a binder. The supply system of powders for thermal spraying are designed in such a way that they can work with powder agglomerates with a particle size in the range from 5 to 25 microns. The minimum size of the grains or particles in conventional powders is from 1 to 0.5 microns. In contrast, in nanostructured materials, the size of the grains or particles is in the range from 1 to 100 nanometers. Immediately after synthesizing powders of nanoparticles usually unsuitable for conventional coating by thermal spraying and require re-treatment to ensure that they meet the requirements to the size of the conventional methods of spraying. Accordingly, there remains a need for methods reparse newly synthesized powders in order to ensure their suitability for routine industrial spraying. Alternatively, there remains a need to provide reliable, low-cost, in the ka powder for synthesis of particles in-situ in the device for thermal spraying to ensure reproducible quality of the deposition of nanostructured coatings.

Brief description of the invention

The above and other problems and difficulties of the prior art are overcome or mitigated through methods of the present invention, which first creates the possibility of obtaining nanostructured materials suitable for use in a conventional technology of thermal spraying.

Accordingly, in one embodiment, the present invention provides a method of re-processing newly synthesized powders of nanoparticles with obtaining aggregated forms suitable for use in a conventional technology of deposition of nanostructured coatings, characterized in that the synthesized powder is first dispersed in a liquid medium by ultrasound and then subjected to spray drying. These dried by spraying agglomerated nanostructured powders have a spherical shape and narrow size distribution of particles in the optimum range of 10-50 microns. Therefore, these powders have excellent characteristics of the raw material for thermal spraying, and ensure uniform melting in the flame or plasma. And because the coatings have a uniform nanostructure, minor porosity, good and the new mills or mechanical mixing, the method of the present invention allows to mix elements of materials at the molecular level.

In an alternative embodiment, the present invention provides a method of direct injection box nanoparticles newly synthesized powder to the torch or plasma in a conventional device for thermal spraying, characterized in that the synthesized powder is first dispersed in a liquid medium by means of ultrasound.

Direct injection box through this method enables reproducible deposition of high quality nanostructured coatings without an intermediate step of re-processing. Very short diffusion distances enable quick reactions between nanoparticles and vapors in the gas stream, as for example carburization, nitriding and Borisovna. This option also provides the ability to mix components of a given material at a molecular level.

In yet another embodiment, the present invention provides a method for obtaining nanostructured coatings using metal organic aerosol raw material formed by means of ultrasound, otlichalis other characteristics and advantages of the present invention can be appreciated and understood by specialists from the subsequent detailed description and drawings.

Brief description of drawings

We will refer now to the drawings, in which similar elements are denoted by similar positions in each of the drawings, where

Fig. 1 is a technological card of examples of synthesis of agglomerated nanostructured powders for use in the coating by thermal spraying, including the method of processing newly synthesized powders according to the present invention;

Fig. 2 is a detailed process map of how to re-process only synthesized nanostructured powders according to the present invention;

Fig. 3 is a scanning electron micrograph of WC/CO nanostructured powder obtained by way of re-processing according to the present invention;

Fig. 4A and 4B are diagrams comparing thermal spraying of conventional particles of metal powder (cermet grade) and agglomerated particles of metal powder (cermet grade) of the present invention;

Fig. 5 is an illustration of a method of producing nanostructured coatings according to the present invention, using ORGANOMETALLIC aerosol raw material, obtained through ultrasound.

When O2 or 14, or their mixture, is first suspended in a liquid medium with the formation of the suspension 18. The liquid medium can be water-based or organic-based, depending on the desired characteristics of the finished agglomerated powder.

Suitable organic solvents include, but are not limited to, toluene, kerosene, methanol, ethanol, isopropyl alcohol, acetone, etc.

The medium is then treated with ultrasound for dispersion of nanostructured material, forming a dispersion of 20. The effect of ultrasonic scattering is most sharply expressed in zone 22 at the end of the ultrasonic horn 24. Nanostructured powder can simply be dispersed in solution or may form a colloidal suspension, usually within a few minutes.

The solution can also be added binder with the formation of the mixture 26. In liquids based on organic binder contains from about 5 to about 15 wt.%, preferably about 10 wt.% paraffin dissolved in a suitable organic solvent. Suitable organic solvents include, but are not limited to, hexane, pentane, toluene, etc. In liquid media water-based binder emulsion contains industrially available soluble polymer, formed in deionized water. Binder is present in the range from about 0.5 wt.% up to about 5 wt.% by weight of the total solution, preferably from about 1 wt.% up to about 10 wt.% from the weight of total solution. The preferred binder is CMC.

After mechanical mixing and, if necessary, additional ultrasonic treatment, the suspension nanostructured powder in a liquid medium 26 is subjected to spray drying in hot air with the formation of agglomerated particles 16. Although it may be used any suitable non-reactive gas or a mixture thereof, preferred are nitrogen or hot argon. Due to the lack of processing requirements exhaust from spray dryers gas, it is preferable to use liquid water based, where possible.

After spraying, the powder 16 is subjected to heat treatment at low temperatures (<250(C) to remove residual moisture, leaving the organic component (polymer or wax) as a binder phase. If necessary, can be added to stage additional heat treatment at a high temperature, effective to remove absorbed and chemisorbing oxygen and sposobem thermal spraying. Further non-limiting examples illustrate the way to reparse just synthesized nanostructured powders using ultrasonic dispersion.

EXAMPLE 1

Typical processing conditions for obtaining agglomerates of nanostructured WC/Co powder with the following conditions.

Nanostructured WC/Co, prepared by well-known means, formed in about 50 wt.% the solution in deionized and obeskislorozhennaja water. For dispersion of nanostructured WC/Co with formation of a suspension of low viscosity used ultrasonic horn, operating at a frequency of 20,000 Hz at a power of 300 to 400 watts. When power is supplied to this power source, only that the synthesized particles are in the form of a hollow spherical shell with a diameter of 10-50 μm, quickly disintergrates and dispersibility in a liquid medium, forming a dispersed phase particle size of about 100 nanometers. Then the suspension was added 5-10 wt.% gas soot and 2-3 wt.% the PVP solution in deionized and obeskislorozhennaja water. Gas soot was added optional to compensate for the loss of carbon in the WC particles due to the high response torch or plasma. For use with WC/Co mA is the Zia was subjected to spray drying in an industrial unit for the production of powder, consisting of solid spherical particles with an average diameter in the range of 5-20 microns, is shown in Fig.3. In conclusion, the powders are preferably purified by low-temperature degassing treatment under reduced pressure after agglomerating before re-filling with nitrogen. After that, the powder for an indefinite period of time, not degrading, stored in nitrogen.

Due to the highly developed surface of the agglomerates of nanostructured WC/Co powder and the presence of oxygen and oxygen-enriched groups there is the possibility of decarburization in situ inside the agglomerates. To avoid this problem at some stages in the processing of powder, it is preferable to introduce piscivorous processing, using a suitable not containing oxygen compound such as wax. Paraffin chemisorbents developed on the surface of the nanoparticles. It is preferable to introduce the paraffin in hexane solution (5-10 wt.%).

For the deposition of nanostructured cermet coatings ideal high-speed toplivorazdatochnye (HVOF) process due to the relatively low temperature of the torch and a short time of transfer of particles that minimizes harmful reactions in f is emer, WC/Co, re-processed by the method of the present invention, a homogeneous melt of the matrix (binder) phase in the coating by thermal spraying with the formation of semi-solid or porous particles. According Fig. 4A and 4B particles of conventional powder 40 containing the solid phase particles 42, surrounded by a solid matrix phase 44. In thermal zone device for spraying solid matrix phase 44 becomes molten matrix phase 46. Therefore, in the ordinary particles of metal powder (cermet grade) 40 large (diameter of 5-25 μm) grain carbide 42 are in heat zone small changes in size due to the limited time of heat transfer during the time of transfer from the nozzle and prior to the collision with the substrate of 1 millisecond. Cover 48 formed by these particles, therefore, can be porous.

Unlike conventional powder kermet agglomerated particles of metal powder (cermet grade) 50 of the present invention containing solid particles 52 with a grain size in the range from about 5 to about 50 nanometers, agglomerated inside the matrix phase 54 through the connecting 56. In the process of thermal spraying Itsa in the molten matrix 58 with the formation of porous particles cermet grade 60. This porous particle 60 will be easy to fall for the collision with the substrate, forming a dense high adhesive coating with low porosity 62. The degree of fluidity of the colliding particles can be adjusted by selection of the degree of superheat relative to the eutectic temperature of the colliding particles. In addition, the high speed collision porous nanostructured particles kermet helps to improve the deposition and adhesion to the substrate surface.

EXAMPLE 2

Nanostructure powders CR3WITH2/NiCr obtained by ASR and OSR methods are in the form of loose agglomerates of various sizes and morphology. Using the above basic procedure, these powders can be dispersed by ultrasound in aqueous or organic liquid medium with a polymer or paraffin binder and subjected to spray drying to produce spherical agglomerates of uniform size with a diameter of 5-25 microns. Moreover, in the process of thermal spraying nanocomposite powders partially melted and subjected to quenching by spraying in a collision with the surface of the substrate. This behavior is similar to the behavior described for nanostructured powders of WC/Co.

2/GM) and the form of hard agglomerates, called "concrete aggregates" with 10-100 nanoparticles to aggregate. Such powders can be easily dispersed in aqueous solution due to the inherent hydrophilicity. The obtained colloidal suspension containing PVA, PVP or CMC as a binder, may be converted (transformed) into a spherical aggregate by drying the dispersion, as discussed above. However, the behavior during thermal spraying is different, because the particles of SiO2rather prone to softening than melting.

Dried spray agglomerated nanostructured powders described in the above examples, have a spherical shape and a narrow distribution of particle sizes in the optimal range of 10-50 microns. As such, they have excellent characteristics of the raw material for thermal spraying and tends to be uniform melting in the flame or plasma, while educated of these coatings have a homogeneous structure, minor porosity, good adhesion to the substrate and excellent durability. In castnet is 3WITH2/Ni, Fe3Mo3C/Fe have a new nanostructure, including nanodisperse solid carbide phase in amorphous or nanocrystalline enriched metal matrix phase, resulting exhibit excellent hardness and wear resistance.

In an alternative embodiment of the present invention nanostructured powder raw material is introduced into the system thermal spraying immediately after ultrasonic dispersion. Suitable only synthesized nanostructured powders for the implementation of the present invention are powders obtained by any physical method, such as GCP, or by means of chemical treatment, such as IGC and CVC ways. Such powders are monodisperse and loose, loosely agglomerated. The particle size is easily adjustable in the range of 3-30 nm by fine adjustment of certain critical parameters known from the prior art. These loosely agglomerated powder can be easily dispersed in deionized water, various alcohols or liquid hydrocarbons by ultrasonic mixing to form a colloidal suspension or slurry. This nanofactory suspension or slurry can then be is anyone's power. Alternative suspension or slurry can be introduced in the form of an aerosol in a gas supply for plasma or HVOF spray.

A feature of this option is that the particles are rapidly heated in the vicinity of the nozzle of the sprayer and almost simultaneously reach the gas flow rate, which is in the ultrasonic range. In some cases, the nanoparticles evaporate before they condense on the cold substrate. In this case, the method is actually very high-speed CVD process.

In the case of applications for individual composition direct injection box nanoparticles by this method promises many advantages. First, it eliminates the need for secondary processing. Secondly, two or more system power nanoparticles, operating continuously or sequentially, can create multineedle or compositionally modulated structures with sizes even below nanoscale. Third, the dispersion may be carried out in the same fluid that is used as fuel for a device for thermal spraying, for example, kerosene. And finally, due to the short diffusion distances between particles and vapors in ptx2">

The method of direct injection box can also be used for the introduction of nanostructured ceramic whiskers, hollow membranes and particles of other shapes in the nanocomposite coating. Hollow ceramic microspheres (diameter 1-5 microns) industrial available. Usually to create almost any desired coating structure, including reinforced filamentary crystals and layered nanocomposites can be used mixtures of different phases and morphology particles.

Thus, simplicity, flexibility and the ability to change the size of the particles of a direct injection box nanoparticles is the ability to develop new classes of thermally sprayed nanostructured coatings. Moreover, due to the fact that the device for thermal spraying can be adapted to existing systems thermal spraying method is cost effective. Further non-limiting examples illustrate this variant of the method of injection box just synthesized powders immediately after ultrasonic dispersion.

EXAMPLE 4

Nanostructured powders ZrO2, Al2O3, SiO2and SiCxNyobtained through the CVC spoo particle size was easily dispersible in the organic liquid medium to form a colloidal suspension. Therefore, these materials are ideal materials for direct injection box in a stream of fluid typical spray for thermal spraying. From nanostructured powders SiO2and CR3WITH2/NiCr were obtained high-density coating, respectively, amorphous and partially amorphous structures.

EXAMPLE 5

Submicron nanostructured particles of WC/Co supported in a highly dispersed state in the liquid phase after ultrasonic treatment by continuous mechanical agitation. Therefore it was not necessary to obtain a completely stable colloidal suspensions of these powders. The coatings obtained by subsequent direct injection box in the burning zone spray for thermal spraying, similar to the coatings obtained with the use of powder agglomerates as raw materials.

Example 6

The method of direct injection box used for sputtering deposition of nanostructured coatings of yttriastabilized zirconium oxide (YSZ) pre-oxidized substrates from metal-CrAlY. The coating preferably leveled composition to minimize stresses due to mismatch of thermal expansion that is what the ski conditions.

EXAMPLE 7

A new type thermobarrier coating (TBC coatings) can be obtained by introducing a hollow ceramic microspheres in the upper floor of nanostructured YSZ deposited on the binder coating the metal-CrAlY. Alternatively, the ceramic microspheres can be introduced into a binder coating the metal-CrAlY. In this case, to provide high thermal resistance of the coating layer requires a high volume fraction of microspheres.

EXAMPLE 8

With the introduction of a torch or plasma suspended mixture of nanoparticles and hollow microspheres possible selective melting of the nanoparticles at nerasbavlennam microspheres. It was therefore obtained composite coating, in which the hollow ceramic spheres are connected with the substrate through a dense nanostructured ceramic coatings.

thermo-barrier coating of nanostructured YSZ can be obtained either by way of re-processing, either by way of direct injection box. In any case, the finished coating may contain or equiaxial or columnar grain, depending mainly on the deposition rate of particles and the temperature gradient in the deposited coating.

In yet another variant of this is electonica, obtained through the ultrasonic nozzle. This creates an advantage in combining nanoparticle synthesis, melting and quenching in a single operation. According Fig.5 liquid precursor was put in an ultrasonic nozzle 82. The nozzle sprays the resulting aerosol 84 plasma 86 created by passing a plasma-forming gas on the electrodes 88, obtaining nanoparticles 90, which can then be hardened on the substrate. For example, the ORGANOMETALLIC precursor hexamethyldisilazane (HMDS) was sprayed in the air by means of ultrasound and submitted to the exit nozzle of the plasma spray DC. Fast pyrolysis connection predecessor led to the formation of clusters or nanoparticles nanostructured SiCxNythat was opuscules in the form of high-speed beam spray. Of these hot particles colliding and cholesterolic on the surface of the substrate, there was formed a coating.

Nanostructured coatings formed by methods of the present invention, have found wide application in various fields. In particular, nanostructured coatings formed from oxyapatite or Vitallium, have found application in medical devices is one to wear. Unlike powders, mixed, for example, by means of a ball mill or by means of mechanical mixing, the method of the present invention provides the possibility of mixing of the constituent elements of the material at the molecular level. Very short diffusion distance in a variant of direct injection box provides the possibility of very fast reactions between nanoparticles and vapors in the gas stream, for example, reactions carburization, nitriding and Borisovna.

Although in the present description of the depicted and described preferred variants of the present invention, it can be carried out in various modifications and substitutions, without departing from the spirit and scope of the present invention. Accordingly, it should be clear that the present invention is described by way of illustration and is not limited to them.

1. The method of obtaining agglomerated nanostructured particles, comprising: (a) a dispersion of nanostructured material in a liquid medium by means of ultrasound; (b) adding an organic binder to the environment by obtaining a solution; and (C) spray drying the solution to obtain agglomerated nanostructured particles.

2. Cmdiameter.

3. The method according to p. 1, characterized in that the organic binder is chosen from the group comprising polyvinyl alcohols, polyvinylpyrrolidone and carboxymethylcellulose.

4. The method according to p. 1, characterized in that it further carry out the heat treatment agglomerated nanostructured particles in a stream of hydrogen at high temperature, effective to remove absorbed and chemisorbing oxygen and contributing to the partial sintering.

5. The method of direct injection box nanostructured particles in the spray coating machine for coating by thermal spraying, including: (a) ultrasonic dispersion of nanostructured material in a liquid environment, with the formation of a dispersed solution; (b) the injection box mentioned dispersion solution directly into the power for the device for thermal spraying.

6. The method according to p. 5, characterized in that the dispersed solution Inuktitut in the gas supply device for thermal spraying in the form of an aerosol.

7. The method according to p. 5, characterized in that the dispersed solution additionally contains the elements in the form of particles selected from the group comprising ceramic nitemid the e hollow shell.

8. Nanostructured feedstock for thermal spraying of coatings obtained by the method according to p. 1 or 5.

9. Nanostructured feedstock under item 8, characterized in that it is produced from nanostructured material is selected from the group comprising WC/Co, Cr3C2/Ni, Fe3Mo3C/Fe, yttriastabilized zirconium oxide and SiC, Si3N4and MnO2.

10. The method of obtaining nanostructured coatings, including: (a) ultrasonic dispersion of nanostructured material in a liquid medium; (b) adding an organic binder to the said medium to form a solution; (C) spray drying the solution, leaving behind agglomerated nanostructured particles; and (d) coating of agglomerated nanostructured particles on the product with the formation of nanostructured coatings.

11. Nanostructured coating obtained by the method according to p. 10, characterized in that the coating is formed from a sintered material and it contains nanodisperse solid carbide phase enriched in amorphous metal phase.

12. The method of obtaining nanostructured coatings, including: (a) ultrasonic dispergirovannom in power sprayer for thermal spraying; and (C) coating of agglomerated nanostructured particles on the product with the formation of nanostructured coatings.

13. The method according to p. 12, wherein the dispersion solution further comprises elements in the form of particles selected from the group comprising ceramic whiskers, ceramic hollow shell.

14. The method according to p. 10 or 12, characterized in that the step of spraying the coating support effective superheat above the eutectic temperature of nanostructured particles for the formation of porous agglomerated particles that will easily fall for the collision with the product, subject to coating.

15. Nanostructured coating formed by the method according to p. 10 or 12.

16. Nanostructured coating on p. 15, wherein the nanostructured material contains yttriastabilized zirconium oxide, resulting in thermobalance floor.

17. Nanostructured coating on p. 16. characterized in that it contains equiaxial grains.

18. Nanostructured coating on p. 16, characterized in that it comprises columnar grains.

19. Nanostructured coating on p. 15>o3C/Fe, SiC, Si3N4, yttriastabilized Zirconia, hydroxyapatite, Vitallium and MnO2.

20. The method of obtaining nanostructured coatings, including: (a) the formation of a solution of the ORGANOMETALLIC source material; (b) spraying ORGANOMETALLIC solution by ultrasound; and (C) the filing of spray solution at the exit of a nozzle of the plasma spray gun, where it then comes into contact with the product, subject to coating.

21. Nanostructured coating formed by the method according to p. 20.

22. Nanostructured coating on p. 21, characterized in that the ORGANOMETALLIC raw material is hexamethyldisilazane.

 

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