CN114015961A - Bimetal oxide lubricating composite coating and preparation method thereof - Google Patents
Bimetal oxide lubricating composite coating and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 238000000576 coating method Methods 0.000 title claims abstract description 61
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 230000007704 transition Effects 0.000 claims abstract description 47
- 229910000943 NiAl Inorganic materials 0.000 claims abstract description 38
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical group [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000010410 layer Substances 0.000 claims abstract description 37
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002344 surface layer Substances 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 20
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011224 oxide ceramic Substances 0.000 claims abstract description 19
- 229910052574 oxide ceramic Inorganic materials 0.000 claims abstract description 19
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 14
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 36
- 238000007750 plasma spraying Methods 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000498 ball milling Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 229910000816 inconels 718 Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000000643 oven drying Methods 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- 229910002900 Bi2MoO6 Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910005809 NiMoO4 Inorganic materials 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a bimetal oxide lubricating composite coating and a preparation method thereof, and the bimetal oxide lubricating composite coating comprises a substrate, a transition layer covered on the substrate and a surface layer covered on the transition layer, wherein the transition layer is a NiAl phase, the surface layer comprises a NiAl transition phase and an oxide ceramic phase, and the oxide ceramic phase comprises MoO3And Bi2O3. The invention greatly improves the friction performance of the coating at the medium temperature, avoids the problem of serious abrasion of the binary metal oxide coating under the medium-temperature working condition, and can meet the actual requirement.
Description
Technical Field
The invention belongs to the technical field of thermal spraying materials and coatings, and particularly relates to a bimetallic oxide lubricating composite coating and a preparation method thereof.
Background
With the continuous development of high-tech fields such as aviation, aerospace and the like, the lubrication and the wear reduction of materials in high-temperature structural components are more and more emphasized. Because the service temperature of the lubricating grease is below 400 ℃, the high-temperature structural part improves the service life of the base material by virtue of the solid lubricating coating with good self-lubricating property; however, conventional solid lubricants (graphite, molybdenum disulfide and lead) are severely oxidatively decomposed or volatilized above 400 ℃. Therefore, the development of a novel solid lubricant for improving the high temperature self-lubricating property of the protective coating is urgently required.
Metal oxides have high melting points and excellent high temperature chemical stability and are therefore ideal lubricating phases for high temperature solid lubricating coatings. The results show that CuO/MoO3The metal oxides are designed as a second phase of the protective coating, and the binary metal oxides such as molybdate and the like generated by the tribochemical reaction have an easily-sheared crystal microstructure under the induction of high-temperature frictional heat-force coupling, so that the lubricating performance of the coating can be obviously improved. Plasma spray deposited MoO3the/CuO composite coating shows low friction coefficient and wear rate at a high temperature of 800 ℃, but the friction performance of the coating at a medium temperature (400-600 ℃) is poor, so that the binary metal oxide coating is seriously worn under the medium temperature working condition, and actual requirements are difficult to meet.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a bimetal oxide lubricating composite coating and a preparation method thereof, which greatly improve the friction performance of the coating at medium temperature, avoid the problem of serious abrasion of the bimetal oxide coating under the medium-temperature working condition and can meet the actual requirement.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a dual metal oxide lubricating composite coating comprises a substrate, a transition layer covering the substrate and a transition layer covering the transition layerThe transition layer is a NiAl phase, the surface layer comprises a NiAl transition phase and an oxide ceramic phase, and the oxide ceramic phase comprises MoO3And Bi2O3。
Furthermore, in the surface layer, the NiAl transition phase accounts for 70 wt% -80 wt%, and the oxide ceramic phase accounts for 20 wt% -30 wt% by mass percentage.
Furthermore, the thickness of the transition layer is 40-50 μm, and the thickness of the surface layer is 180-200 μm.
Further, the MoO3And said Bi2O3The mass ratio of (1-2): 1.
further, the substrate is a nickel-based superalloy.
A method of preparing a bimetallic oxide lubricating composite coating, comprising:
adding MoO3And Bi2O3Dissolving in deionized water, uniformly mixing, and drying to obtain first composite powder;
uniformly mixing the first composite powder and the NiAl powder to obtain second composite powder;
spraying a NiAl phase on a substrate by a plasma spraying technology to form a transition layer;
and spraying the second composite powder on the transition layer by a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, so as to obtain the bimetal oxide lubricating composite coating.
Further, the MoO is added3And Bi2O3When dissolved in deionized water, the MoO is calculated by mass percent3And Bi2O330-60% of deionized water and 40-70% of deionized water.
Further, the drying temperature is 60-80 ℃.
Further, when the first composite powder and the NiAl powder are mixed, the first composite powder accounts for 20-30% by mass, and the NiAl powder accounts for 70-80% by mass.
Compared with the prior artCompared with the prior art, the invention has at least the following beneficial effects: the invention provides a bimetal oxide lubricating composite coating, which comprises a substrate, a transition layer and a surface layer, wherein the transition layer covers the substrate, the surface layer covers the transition layer, the transition layer is a NiAl phase, the transition layer provides a good bonding layer for the surface layer and the substrate, the surface layer is a NiAl phase and an oxide ceramic phase, and the oxide ceramic phase comprises MoO3And Bi2O3The surface layer is provided with oxide ceramic phase and NiAl phase, which can be well matched with the transition layer to improve the binding force, and is composed of MoO3And Bi2O3Improving the high temperature and wear resistance of the facing, specifically based on MoO with a close melting point3(795 ℃ C.) and Bi2O3The (825 deg.C) powder is used as raw material, it can be softened at 0.4-0.7 Tm (about 320-560 deg.C), and can be formed into Bi with easy-shearing structure by friction chemical reaction at above 400 deg.C2MoO6、Bi2Mo3O12、NiMoO4The lubricating glaze film composed of ternary metal oxide can greatly improve the medium-temperature tribological property of the coating, and meanwhile, the Ni content in the NiAl transition phase is large, so that the high-temperature resistance of the transition phase can be greatly improved.
In other words, MoO with similar melting points3And Bi2O3The NiAl composite coating is a high-temperature lubricant and prepared by plasma spraying, and the composite coating shows excellent tribological performance. Particularly, the friction coefficient and the wear rate are obviously reduced within the range of 400-800 ℃, and MoO is generated on the worn surface through the friction chemical reaction3、Bi2O3NiMoO formed together with NiO4And Bi2Mo3O12、Bi2MoO6The synergistic lubrication effect of the two components enables a continuous lubricating layer to be formed on the surface, and the high-temperature tribological performance of the composite coating is further improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is the cross-sectional morphology and elemental distribution of the composite coating of example 2.
FIG. 2 shows the friction coefficient of the composite coating of example 2 at 27-800 ℃.
FIG. 3 shows the wear rate of the composite coating of example 2 at 27-800 ℃.
FIG. 4 is a Raman plot of the 400 ℃ wear scar surface of the composite coating of example 2.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment of the present invention, the bimetallic oxide lubricating composite coating comprises a substrate, a transition layer covering the substrate, and a surface layer covering the transition layer, wherein the thickness of the transition layer is 40 μm to 50 μm, and the thickness of the surface layer is 180 μm to 200 μm.
Wherein:
the transition layer is NiAl phase;
the surface layer comprises 70 wt% -80 wt% of NiAl transition phase and 20 wt% -30 wt% of oxide ceramic phase according to mass percentage;
the oxide ceramic phase comprises MoO3And Bi2O3；
The substrate is nickel-based superalloy.
The invention relates to a preparation method of a bimetal oxide lubricating composite coating, which comprises the following steps:
wherein, MoO3And Bi2O3The mass ratio of (1-2): 1;
step 2, putting 20-30% of first composite powder and 70-80% of NiAl powder into a three-dimensional mixing instrument to be mixed for 5-10 hours according to mass percent, uniformly mixing, and then putting into a 60-90 ℃ oven to obtain second composite powder;
and 3, spraying the NiAl phase on the substrate by using a plasma spraying technology, namely depositing the NiAl phase on the Inconel718 high-temperature alloy by using the plasma spraying technology
Forming a transition layer;
and 4, spraying the second composite powder on the transition layer by a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, namely obtaining NiAl-MoO with a compact structure3/Bi2O3Composite coatings, i.e., bimetallic oxide lubricating composite coatings.
Example 1
And 2, putting 20% of the first composite powder and 80% of NiAl powder into a three-dimensional mixing instrument to be mixed for 5 hours, and then putting the mixture into a 60 ℃ oven to be dried to obtain second composite powder.
Step 3, depositing a NiAl phase on the Inconel718 high-temperature alloy on the substrate by a plasma spraying technology
And forming a transition layer with the thickness of 40 μm.
And 4, spraying the second composite powder on the transition layer by using a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, wherein the thickness of the surface layer is 200 mu m, and thus the bimetal oxide lubricating composite coating is obtained.
And (3) detecting the performance of the obtained bimetallic oxide lubricating composite coating: the surface hardness of the coating is 167.8 +/-18.2 Hv0.5; the bonding strength is 45.7 +/-4.9 MPa; high-temperature friction test (27-800 ℃, ball-disk contact, dual-ball material zirconium oxide, rotation radius of 5mm, rotation speed of 200r/min, load of 10N): the friction coefficient is 0.22-0.45, and the wear rate is as follows: 3.279-28.6 x 10-5mm3N-1m-1。
Example 2
And 2, putting 25% of the first composite powder and 75% of NiAl powder into a three-dimensional mixing instrument to mix for 7 hours, and then putting the mixture into an oven at 80 ℃ to dry to obtain second composite powder.
Step 3, depositing a NiAl phase on the Inconel718 high-temperature alloy on the substrate by a plasma spraying technology
And forming a transition layer with the thickness of 45 μm.
And 4, spraying the second composite powder on the transition layer by using a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, wherein the thickness of the surface layer is 190 microns, and thus obtaining the bimetal oxide lubricating composite coating.
And (3) detecting the performance of the obtained bimetallic oxide lubricating composite coating: the surface hardness of the coating is 185.4 +/-15.9 Hv0.5, the bonding strength is 49.8 +/-5.5 Mpa, the sectional morphology of the coating is in a typical layered structure and is accompanied by a small amount of cracks as seen from the sectional morphology and the element distribution of the composite coating in figure 1, and oxides are uniformly distributed among the layers of the layered structure of the coating, so that the continuous and uniform lubrication of the coating in the friction process is facilitated.
High-temperature friction test (27-800 ℃, ball-disk contact, dual-ball material zirconium oxide, rotation radius of 5mm, rotation speed of 200r/min, load of 10N): the change trend of the friction coefficient of the composite coating at 27-800 ℃ can be seen by combining with fig. 2, and the reduction range of the friction coefficient of the composite coating is gradually reduced along with the increase of the experimental temperature to 400 ℃, namely, after the temperature exceeds 400 ℃, a glaze film with lubricating property is gradually generated on the surface of a grinding mark, and the composite coating is gradually softened. This is mainly due to MoO3And Bi2O3The melting points are 795 ℃ and 825 ℃ respectively, and brittle-plastic transformation occurs at 0.4-0.7 Tm (about 320-560 ℃). It can be seen from FIG. 3 that the wear rate reached a minimum of 2.1X 10 at 600 deg.C-5mm3N-1m-1The main reason for this is that the composite coating is formed by the soft metal oxide Bi at room temperature to 200 DEG C2O3It tends to adhere to the mating surfaces during rubbing, resulting in an increased wear rate. When the temperature reaches 400 ℃, NiMoO gradually forms inside the grinding crack as shown in figure 44And Bi2Mo3O12、Bi2MoO6The formed lubricating glaze film reduces the wear rate of the coating, and ternary oxide is not generated inside the wear scar. At 800 ℃, the friction surface had a lubricating glaze film but the low melting point of MoO3And Bi2O3Metal oxides, undergo severe plastic deformation, resulting in a re-increase in wear rate. But the friction coefficient and the wear rate are relatively low between 400 and 600 ℃, which shows that the NiAl-MoO alloy is low in temperature3/Bi2O3The composite coating has good frictional wear performance.
Example 3
And 2, putting 30% of the first composite powder and 70% of NiAl powder into a three-dimensional mixing instrument to be mixed for 10 hours, and then putting the mixture into a 90 ℃ oven to be dried to obtain second composite powder.
Step 3, depositing a NiAl phase on the Inconel718 high-temperature alloy on the substrate by a plasma spraying technology
And forming a transition layer with the thickness of 50 μm.
And 4, spraying the second composite powder on the transition layer by using a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, wherein the thickness of the surface layer is 180 mu m, and thus the bimetal oxide lubricating composite coating is obtained.
And (3) detecting the performance of the obtained bimetallic oxide lubricating composite coating: the surface hardness of the coating is 200.5 +/-21.2 Hv0.5, the bonding strength is 52.3 +/-6.4 Mpa, and the high-temperature friction test (27-800 ℃, ball-disk contact, dual-ball material zirconium oxide, rotation radius is 5mm, rotation speed is 200r/min, and load is 10N): the friction coefficient is 0.18-0.65, and the wear rate is as follows: 4.919-20.9388 x 10-5mm3N-1m-1。
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The bimetallic oxide lubricating composite coating is characterized by comprising a substrate, a transition layer covered on the substrate and a surface layer covered on the transition layer, wherein the transition layer is a NiAl phase, the surface layer comprises a NiAl phase and an oxide ceramic phase, and the oxide ceramic phase comprises MoO3And Bi2O3。
2. The dual metal oxide lubricating composite coating according to claim 1, wherein the NiAl transition phase is 70 wt% to 80 wt% and the oxide ceramic phase is 20 wt% to 30 wt% of the surface layer by mass percent.
3. The dual metal oxide lubricating composite coating of claim 1, wherein the transition layer has a thickness of 40 μm to 50 μm and the top layer has a thickness of 180 μm to 200 μm.
4. The dual metal oxide lubricating composite coating of claim 1, wherein the MoO is3And said Bi2O3The mass ratio of (1-2): 1.
5. the dual metal oxide lubricating composite coating of claim 1, wherein the substrate is a nickel-based superalloy.
6. The method of preparing a dual metal oxide lubricating composite coating as claimed in any one of claims 1 to 5, comprising:
adding MoO3And Bi2O3Dissolving in deionized water, uniformly mixing, and drying to obtain first composite powder;
uniformly mixing the first composite powder and the NiAl powder to obtain second composite powder;
spraying a NiAl phase on a substrate by a plasma spraying technology to form a transition layer;
and spraying the second composite powder on the transition layer by a plasma spraying technology to form a surface layer containing a NiAl transition phase and an oxide ceramic phase, so as to obtain the bimetal oxide lubricating composite coating.
7. The method of claim 6, wherein the MoO is added to the lubricating composite coating3And Bi2O3When dissolved in deionized water, the MoO is calculated by mass percent3And Bi2O330-60% of deionized water and 40-70% of deionized water.
8. The method for preparing the bimetal oxide lubricating composite coating according to claim 6, wherein the drying temperature is 60-80 ℃.
9. The method of claim 6, wherein the first composite powder is 20-30% and the NiAl powder is 70-80% by weight when the first composite powder and the NiAl powder are mixed.
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| CN114703441A (en) * | 2022-03-29 | 2022-07-05 | 中国科学院兰州化学物理研究所 | Preparation method of high-low temperature solid lubricating phase self-adaptive regeneration tribological coating |
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| CN110983234A (en) * | 2019-12-25 | 2020-04-10 | 陕西科技大学 | NiAl-based bimetal oxide high-temperature lubricating wear-resistant composite coating and preparation method thereof |
| CN112808160A (en) * | 2020-12-23 | 2021-05-18 | 陕西科技大学 | Preparation method of double-oxide nano-agglomeration spraying composite powder |
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|---|---|---|---|---|
| US20150017409A1 (en) * | 2011-12-26 | 2015-01-15 | Hitachi, Ltd. | Composite member |
| CN110983234A (en) * | 2019-12-25 | 2020-04-10 | 陕西科技大学 | NiAl-based bimetal oxide high-temperature lubricating wear-resistant composite coating and preparation method thereof |
| CN112808160A (en) * | 2020-12-23 | 2021-05-18 | 陕西科技大学 | Preparation method of double-oxide nano-agglomeration spraying composite powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703441A (en) * | 2022-03-29 | 2022-07-05 | 中国科学院兰州化学物理研究所 | Preparation method of high-low temperature solid lubricating phase self-adaptive regeneration tribological coating |
| CN114703441B (en) * | 2022-03-29 | 2023-01-10 | 中国科学院兰州化学物理研究所 | Preparation method of high-low temperature solid lubricating phase self-adaptive regeneration tribological coating |
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