CN111872372B - Coating powder composition and method for preparing coating - Google Patents
Coating powder composition and method for preparing coating Download PDFInfo
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- CN111872372B CN111872372B CN202010773476.4A CN202010773476A CN111872372B CN 111872372 B CN111872372 B CN 111872372B CN 202010773476 A CN202010773476 A CN 202010773476A CN 111872372 B CN111872372 B CN 111872372B
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- 239000000843 powder Substances 0.000 title claims abstract description 114
- 239000011248 coating agent Substances 0.000 title claims abstract description 80
- 238000000576 coating method Methods 0.000 title claims abstract description 80
- 239000000203 mixture Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims description 17
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 229910020968 MoSi2 Inorganic materials 0.000 claims abstract description 4
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 4
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 239000010955 niobium Substances 0.000 claims description 5
- 229910001080 W alloy Inorganic materials 0.000 claims description 4
- GAYPVYLCOOFYAP-UHFFFAOYSA-N [Nb].[W] Chemical compound [Nb].[W] GAYPVYLCOOFYAP-UHFFFAOYSA-N 0.000 claims description 4
- 239000006255 coating slurry Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910007948 ZrB2 Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 2
- 229910001362 Ta alloys Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 1
- 239000000956 alloy Substances 0.000 description 19
- 229910045601 alloy Inorganic materials 0.000 description 19
- 230000003647 oxidation Effects 0.000 description 19
- 238000007254 oxidation reaction Methods 0.000 description 19
- 238000012360 testing method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000012496 blank sample Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910004339 Ti-Si Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910010978 Ti—Si Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000012863 analytical testing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011204 carbon fibre-reinforced silicon carbide Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a coating powder composition comprising: mo powder, W powder, Y2O3Powder, Cr powder, V powder, Ta powder, B powder, ZrB powder2Powder, KF powder, Ir powder, carbide powder, MoSi2Powder, Si powder, wherein carbide is selected from one or more of SiC and NbC; wherein the coating powder composition does not contain Ti and Hf.
Description
Technical Field
The invention belongs to the field of surface treatment, and particularly relates to a coating powder composition and a method for preparing a coating.
Background
The aerospace and aviation aircraft engines, structural members and control functional elements need to be used in a high-temperature oxidation environment, and fasteners which can simultaneously have high melting point, high room-temperature mechanical property, strong oxidation resistance and low density requirements are needed so as to meet the special light and high-strength use requirements of aerospace and aviation. In addition, the industries of steel, chemical industry, metallurgy and the like have a plurality of high-temperature operation processes, and similar fasteners with high-temperature resistance, high room-temperature mechanical property and oxidation resistance are also needed.
At present, the fastening piece materials at home and abroad mostly use titanium, iron, cobalt and nickel-based alloys, and the use temperature of the materials cannot exceed 1200 ℃ due to the limitation of the melting point of the materials. The ceramic material has poor processing performance, insufficient mechanical property at shearing room temperature and extremely limited application. Noble metals have good oxidation resistance, but have high cost and insufficient mechanical properties at high temperature and room temperature, and are greatly limited in practical application.
Tantalum and niobium have the advantages of high melting point, good processing performance and relatively low cost, and have important application in the high-temperature field, and the typical application is that tantalum or niobium is used as connecting pieces such as screws or rivets when a heating body of a high-temperature resistance furnace is manufactured. However, tantalum and niobium have poor oxidation resistance, and therefore, when used at high temperature, vacuum and inert gas protection are required, or a coating is applied on the surface.
When the Cr-Ti-Si series coating is coated on the Nb-752 alloy, the oxygen content in the Nb-752 alloy is reduced, and the mechanical property of the alloy at room temperature is further reduced. When the coating is coated on the surface of a fastener, the mechanical property of the fastener at room temperature is reduced, and the phenomenon of slide-fastening occurs during assembly or use, so that the pretightening force of the fastener is reduced or completely damaged, and the use safety and reliability of the fastener are seriously influenced.
Disclosure of Invention
Through a great deal of research and development work, the inventor discovers a novel coating powder composition, and a coating prepared by using the coating powder composition is coated on a substrate, so that the novel coating powder composition has the advantages of high temperature resistance and oxidation resistance. Moreover, the mechanical properties of the substrate are not reduced by the coating.
In some aspects, the present disclosure provides a coating powder composition comprising, by weight:
3-8.0 parts of Mo powder;
2.0-3.5 parts of W powder;
50-80 parts of Si powder;
0.1-2.5 parts of Ta powder;
2.0-8.5 parts of Cr powder;
Y2O30.1-2.0 parts of powder;
3-6.0 parts of V powder;
0.5-1.5 parts of powder B;
2.7-4 parts of carbide powder;
ZrB20-1.5 parts of powder;
0-1 part of KF powder;
0.5-3 parts of Ir powder;
MoSi26-8 parts of powder; (e.g., 7 parts) and
0.5-3 parts of Ir powder;
wherein the carbide is selected from one or more of SiC and NbC;
wherein the coating powder composition does not contain Ti and Hf.
Based on the technical scheme, the coating powder composition disclosed by the invention contains carbide (such as selected from SiC and NbC), so that the concentration of C in the coating is higher, and the condition that C in a matrix diffuses into the coating to cause the reduction of the room-temperature mechanical property of the alloy is effectively avoided.
Based on the technical scheme, the coating powder composition disclosed by the invention does not contain metal elements such as Ti, Hf and the like which have an absorption effect on strengthening elements (such as C and/or O elements) in the matrix. For example, the coating powder composition does not contain Ti simple substance, alloy or compound, Hf simple substance, alloy or compound. The mechanical property of the substrate is not reduced by coating the coating.
In some embodiments, the carbide powder is SiC powder, and the SiC powder is present in an amount of 3 to 4 parts.
In some embodiments, the carbide powder is a mixture of NiC powder and SiC powder, the SiC powder is present in an amount of 2 to 3 parts, and the NbC powder is present in an amount of 0.5 to 1 part.
In some embodiments, the parts by weight are based on 100 parts of the coating powder composition.
In some embodiments, parts by weight refers to parts by weight percent, parts of each component refers to percent by weight.
In some embodiments, the weight percent of each ingredient in the coating powder composition is a percentage relative to the total weight of the coating powder composition.
In some embodiments, the powder particle size of the coating powder composition is 200 mesh or less. The product can pass through 200 mesh sieve below 200 mesh.
In some aspects, there is provided a coating slurry comprising:
the above coating powder composition;
a binder; and
a liquid carrier;
wherein the weight ratio of the binder to the powder composition is 1.2-5: 100, respectively;
wherein the volume ratio of the liquid carrier to the powder composition is 0.5-2: 1 (e.g., 1: 1);
preferably, the binder is polyethylene glycol having a molecular weight of 5000-.
In some aspects, the present disclosure provides a method of preparing a coating slurry, comprising the steps of:
(1) mixing the coating powder composition of any one of the above with a binder and a liquid carrier;
(2) grinding (such as ball milling) the product obtained in the last step;
preferably, in the step (1), the weight ratio of the binder to the powder composition is 1.2-5: 100, respectively;
preferably, the volume ratio of the liquid carrier to the powder composition is 0.5-2: 1;
preferably, in step (1), the binder is polyethylene glycol with a molecular weight of 5000-.
In the scheme, the grinding has the pre-alloying effect, and the C element with a certain content is uniformly distributed in the coating through pre-alloying, so that the C element is prevented from diffusing from the substrate to the coating.
In some aspects, the present disclosure provides a coating slip prepared by the method of any one of the above.
In some aspects, the present disclosure relates to a method of preparing a coating on a substrate, comprising the steps of:
(1) coating the coating slurry on the surface of a substrate;
(2) and sintering the product of the last step.
In some embodiments, the sintering is performed in a vacuum environment.
In some embodiments, the temperature of sintering is 1500-1600 ℃.
In some embodiments, the coating has a thickness of 50 to 100 μm
In some embodiments, the substrate is a tantalum alloy or a niobium alloy.
In some embodiments, the substrate is a niobium tungsten alloy.
In some embodiments, the niobium tungsten alloy has the following composition: 4.5 to 5.5 wt% of W, 1.7 to 2.3 wt% of Mo, 0.7 to 1.2 wt% of Zr, 0.05 to 0.12 wt% of C, and the balance of Nb and inevitable impurities.
In some aspects, the present disclosure provides a coated component prepared by the method of any one of the above.
In some embodiments, the coating powder composition comprises Mo powder, W powder, Si powder, Ta powder, Cr powder, Y powder2O3Powder, V powder, B powder, carbide powder, ZrB2Powder, KF powder, Ir powder, MoSi2The sum of the weights of the powders is 100% or less of the total weight of the coating powder composition. The coating powder composition may also contain a binder, an additive, an auxiliary material, and the like.
In some embodiments, the sum of the components in the coating powder composition is 100%.
Interpretation of terms
"comprising", "containing" and "containing" have the same meaning, i.e.a content of more than zero, for example ≥ 0.1 wt.%, for example ≥ 1 wt.%, for example ≥ 10 wt.%, for example ≥ 20 wt.%, for example ≥ 30 wt.%, for example ≥ 40 wt.%, for example ≥ 50 wt.%, for example ≥ 60 wt.%, for example ≥ 70 wt.%, for example ≥ 80 wt.%, for example ≥ 90 wt.%, for example 100 wt.%. The meaning of "comprising", "containing" or "containing" is equivalent to "consisting of …" when the content is 100 wt% "
"free" may mean substantially free, e.g., less than 0.1 wt%, e.g., less than 0.01 wt%, e.g., less than 0.001 wt%.
"powder" means particles that pass through an N mesh screen. The value of N may be 10 or more, for example 100 to 1000, for example 200 to 600.
Advantageous effects
(1) The mechanical property of the coating at room temperature of the alloy is basically not influenced, the tightening torque of the coating fastener is almost consistent with that before the coating, and the phenomenon of slipping is avoided;
(2) the coating has oxidation resistance (the oxidation resistance life is more than or equal to 2h at 1600 ℃ and the water-cooling thermal shock performance at 1600-room temperature is more than or equal to 200 times), and can play a good role in oxidation resistance protection for the fastener.
Drawings
FIG. 1 is a schematic view of an embodiment NbW5-1 alloy fastener.
FIG. 2 is a schematic diagram of an assembly-tension test of one embodiment.
Detailed Description
The formulations of the coating powder compositions used in the following examples are shown in Table 1. The particle size of each component powder is 200 meshes.
TABLE 1
COMPARATIVE EXAMPLE 1 (blank)
NbW5-1 alloy fasteners are provided, which are M8 size bolts. FIG. 1 shows a schematic view of an NbW5-1 alloy fastener. The NbW5-1 alloy had a composition of 91.5Nb-4.87W-1.93Mo-0.84Zr-0.064C (wt%).
As shown in fig. 1, the fastener is a bolt 10, the bolt 10 having an external thread 11.
Comparative example 1 also provided a co-fired coupon of the NbW5-1 alloy fastener.
Example 1
1) Coating powder compositions were formulated according to the formulation shown in table 1 and then placed in a container;
2) adding anhydrous ethanol with the volume 1 time that of the powder composition into a container as a carrier;
3) adding polyethylene glycol as a binder in an amount of 1.2 wt% based on the mass of the powder composition into a container;
4) the materials are ball-milled at a high speed to prepare slurry, the ball-milling speed is 150r/min, and the ball-milling time is 10 hours;
5) the fasteners (blank samples) made of the NbW5-1 alloy of the comparative example 1 are all immersed in the slurry for 5s and then taken out, and are dried for 10min in a ventilated environment;
6) and (3) placing the fastener with the slurry coated on the surface into a vacuum resistance furnace, sintering in a high-temperature and vacuum environment (1550 ℃ and below 0.1 Pa), and forming a high-temperature-resistant and oxidation-resistant coating on the surface after sintering. The thickness of the coating is 55 to 68 μm.
The same coating treatment was carried out on test pieces of NbW5-1 alloy fasteners as in the furnace.
Example 2
1) Coating powder compositions were formulated according to the formulation shown in table 1 and then placed in a container;
2) adding anhydrous ethanol with the volume 1 time that of the powder composition into a container as a carrier;
3) adding polyethylene glycol (molecular weight 6000) as a binder in an amount of 5 wt% based on the mass of the above powder composition into a container;
4) the materials are ball-milled at a high speed to prepare slurry, the ball-milling speed is 450r/min, and the ball-milling time is 3.5 h;
5) all the fasteners (blank samples) made of the NbW5-1 alloy of the comparative example 1 are immersed in the slurry for 10s and then taken out, and the fasteners are dried for 45min in a ventilated environment;
6) and (3) placing the fastener with the slurry coated on the surface into a vacuum resistance furnace, sintering in a high-temperature and vacuum environment (1550 ℃ and below 0.1 Pa), and forming a high-temperature-resistant and oxidation-resistant coating on the surface after sintering. The thickness of the coating is 57-65 μm.
The same coating treatment was carried out on test pieces of NbW5-1 alloy fasteners as in the furnace.
Analytical testing
1. Mechanical properties
The NbW5-1 alloy fasteners of comparative example 1, and example 2 were tested for mechanical properties according to the test standard, GJB715.23 "tensile strength of fastener test method", and the results are shown in table 2 below.
TABLE 2
2. Oxidation resistance test
The oxidation resistance test was performed on the same furnace test pieces of examples 1 and 2, and the test piece specification: 70X 8X 1 (mm). The test comprises a static oxidation test at 1600 ℃ and a water-cooling thermal shock test at 1600 ℃ -room temperature, and a high-temperature oxidation tester is adopted for detection according to the industry standard. The test results are shown in table 3 below.
TABLE 3
3. Assembly-tensile test
The coated fasteners of the embodiment 1 and the comparative example 1 are disassembled and assembled at normal temperature with a torque wrench and the matched nut, and the non-brand new fastener is obtained after repeated disassembly and assembly.
The non-new fastener described above is installed into the tension clamp shown in fig. 2. The tension jig includes an upper jig 21 and a lower jig 22, the upper jig 21 fixing the head of the bolt 10, and the lower jig 22 fixing the shank of the bolt 10. The lower clamp 22 is made of a C/SiC composite material. The lower clamp 22 has an internal thread 24, the internal thread 24 cooperating with the external thread 11 of the bolt 10. The arrows in fig. 2 show the load loading direction, pulling the upper clamp 21 and the lower clamp 22 in opposite directions until the external thread 11 slips with the internal thread 24.
The test results are shown in table 4 below:
TABLE 4
The experimental data in tables 2 to 4 show that the coating prepared from the coating powder composition of the present invention is used for preparing a high temperature resistant and oxidation resistant coating, which has the following advantages:
(1) the mechanical property of the coating at room temperature of the alloy is basically not influenced, the tightening torque of the coating fastener is almost consistent with that before the coating, and the phenomenon of slipping is avoided;
(2) the coating has oxidation resistance (the oxidation resistance life is more than or equal to 2 hours at 1600 ℃ and the water-cooling thermal shock performance at 1600-room temperature is more than or equal to 200 times), and can play a good role in oxidation resistance protection for the fastener;
(3) the coating has better durability and still has better tensile property after repeated assembly.
Although embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure, and that such modifications are intended to be within the scope of the invention. The full scope of the invention is given by the appended claims and any equivalents thereof.
Claims (14)
1. A coating powder composition comprising, in parts by weight:
3-8.0 parts of Mo powder;
2.0-3.5 parts of W powder;
50-80 parts of Si powder;
0.1-2.5 parts of Ta powder;
2.0-8.5 parts of Cr powder;
Y2O30.1-2.0 parts of powder;
3-6.0 parts of V powder;
0.5-1.5 parts of powder B;
2.7-4 parts of carbide powder;
ZrB20-1.5 parts of powder;
0-1 part of KF powder;
0.5-3 parts of Ir powder; and
MoSi26-8 parts of powder;
wherein the carbide is selected from one or more of SiC and NbC;
wherein the coating powder composition does not contain Ti and Hf.
2. The coating powder composition of claim 1, wherein:
the carbide powder is SiC powder, and the content of the SiC powder is 3-4 parts by weight; or
The carbide powder is a mixture of NbC powder and SiC powder, and the content of the SiC powder is 2-3 parts by weight and the content of the NbC powder is 0.5-1 part by weight.
3. The coating powder composition according to claim 1, wherein the powder particle size of the coating powder composition is 200 mesh or less.
4. The coating powder composition of claim 1, wherein the parts by weight are based on 100 parts of the coating powder composition.
5. A coating slip comprising:
the coating powder composition of any one of claims 1 to 4;
a binder; and
a liquid carrier;
the weight ratio of the binder to the coating powder composition is 1.2-5: 100, respectively;
the volume ratio of the liquid carrier to the coating powder composition is 0.5-2: 1;
the binder is polyethylene glycol with molecular weight of 5000-10000.
6. A method of preparing a coating slurry comprising the steps of:
(1) mixing the coating powder composition of any one of claims 1 to 4 with a binder and a liquid carrier;
(2) grinding the product obtained in the previous step;
in the step (1), the weight ratio of the binder to the coating powder composition is 1.2-5: 100, respectively;
the volume ratio of the liquid carrier to the coating powder composition is 0.5-2: 1;
in the step (1), the binder is polyethylene glycol with the molecular weight of 5000-10000.
7. The method of claim 6, wherein the milling is ball milling, the rotation speed of the ball milling is more than 100-400 r/min, and the ball milling time is more than 3 h.
8. A coating slip obtained by the process of claim 6 or 7.
9. A method of preparing a coating on a substrate comprising the steps of:
(1) applying the coating slip of claim 5 or 8 to a substrate surface;
(2) and sintering the product of the last step.
10. The method of claim 9, characterized by one or more of the following:
-said sintering is carried out in a vacuum environment;
-the temperature of the sintering is 1500-1600 ℃;
the thickness of the coating is 50-100 μm.
11. The method of claim 9, wherein the substrate is a tantalum alloy or a niobium alloy.
12. The method of claim 11, wherein the substrate is a niobium tungsten alloy.
13. The method of claim 12, the niobium tungsten alloy having the following composition: 4.5 to 5.5 wt% of W, 1.7 to 2.3 wt% of Mo, 0.7 to 1.2 wt% of Zr, 0.05 to 0.12 wt% of C, and the balance of Nb and inevitable impurities.
14. A coated component produced by the method of any one of claims 9 to 13.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0238758A2 (en) * | 1986-03-28 | 1987-09-30 | Martin Marietta Corporation | Welding using metal-ceramic composites |
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| US20160023951A1 (en) * | 2013-01-07 | 2016-01-28 | Vince Alessi | Thermoset ceramic compositions, inorganic polymer coatings, inorganic polymer mold tooling, inorganic polymer hydraulic fracking proppants, methods of preparation and applications therefore |
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| EP0238758A2 (en) * | 1986-03-28 | 1987-09-30 | Martin Marietta Corporation | Welding using metal-ceramic composites |
| CN1105918A (en) * | 1993-10-27 | 1995-08-02 | H·C·施塔克公司 | Method for producing metal and ceramic sintered bodies and coatings |
| JP2004107558A (en) * | 2002-09-20 | 2004-04-08 | Nekken Kagaku Kogyo Kk | Heat-resistant and anticorrosive coating and heat-resistant and anticorrosive coating film |
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