CN109402549A - A kind of high temperature resistance oxide covering and preparation method thereof - Google Patents
A kind of high temperature resistance oxide covering and preparation method thereof Download PDFInfo
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- CN109402549A CN109402549A CN201811635633.4A CN201811635633A CN109402549A CN 109402549 A CN109402549 A CN 109402549A CN 201811635633 A CN201811635633 A CN 201811635633A CN 109402549 A CN109402549 A CN 109402549A
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
-
- 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
Abstract
The invention discloses a kind of high temperature resistance oxide covering and preparation method thereof, which is formed by following material composition and content melting: Ni 10-18wt%, CeO27-15wt%, V 10-20wt%, ZrO25-10wt%, MOSi28-18wt%, B 3-10wt%, surplus Mo.Anchoring strength of coating prepared by the present invention is high, and good with matrix thermal matching, thermal shock resistance is strong, has excellent high-temperature oxidation resistance, has wide practical use.
Description
Technical field
The invention belongs to coating material preparation fields, and in particular to a kind of high temperature resistance oxide coating alloy powder and its
Preparation method.
Background technique
Molybdenum and molybdenum alloy are a kind of important high-temperature structural materials, are had excellent high temperature strength and high temperature hardness, well
Thermal shock resistance, heat-resistant anti-fatigue performance the advantages that, be widely used in Aeronautics and Astronautics and nuclear industry field.But molybdenum inoxidizability
Can be very poor, 600 DEG C or so will occur vigorous oxidation, seriously constrain its engineer application under high temperature aerobic environment.It is another
Aspect, Aeronautics and Astronautics and nuclear industry make remarkable progress again in recent years, all kinds of aircraft speeds continuous improvements, rocket engine
Dynamical system constantly enhance and nuclear reactor on crucial molybdenum alloy component service temperature gradually rise, part molybdenum alloy component needs
Will 1700 DEG C several minutes of short-term operation to a few hours, this proposes growing new demand to molybdenum alloy material and component.
Therefore, development is higher using temperature, can bear high temperature and high-speed flow washes away and the simple antioxidant coating of preparation process becomes
Molybdenum and its research hotspot of alloy high-temp protection at present.
The preparation of the high-temperature oxidation resistant coating of existing molybdenum or molybdenum alloy is all made of packet infiltration method or slurry packet seeps method, is expanded by solid phase
It dissipates and forms protective coating, see " high-temperature oxidation resistant coating " (High Temperature Oxidation- of the works such as G.M.Pound
Resistant Coatings) book.Packet infiltration method is will to be equipped in the magazine of metal feed powder by the molybdenum part embedment for the system of seeping
12-24 hours are undergone at a high temperature of 982~1200 DEG C or even the longer time is repeatedly heat-treated, in molybdenum part surface and metal
Solid-state diffusion is generated between feed powder and forms coating.It is before part is embedded to magazine, on piece surface that slurry packet, which seeps method also,
Layered material slurry is first applied, and other techniques and packet infiltration method are identical.As it can be seen that both techniques are all more complicated, and need huge
Magazine and a large amount of feed powder, so that part is embedded in wherein, both methods seep system time is all very tediously long, power consumption is big, at
This height.And for complex-shaped big component, the uniformity of coating layer thickness is not easy to guarantee, antioxygenic property is unstable.
And in molybdenum alloy protective coating system, the heat-resisting alloys coating such as Ni-based and cobalt-based can effective protection at 1100 DEG C
100~500 hours, but protect temperature restriction in 1300 DEG C hereinafter, and can cause to take off because of counterdiffusion and thermal expansion coefficient mismatch
Skin phenomenon；Coat of aluminide preparation process is simple, mature, and the influence degenerated to matrix mechanical performance is small, can be at 1500 DEG C or less
Temperature effective protection, but it is unsuitable for thermal shock environments and 1600 DEG C of temperatures above；Oxide coating potentiality are prominent, can be 1920
℃(Al2O3) and 2200 DEG C of (ZrO2) in short-term, single for molybdenum alloy provide effective oxidation protection, but pure-oxide coating heat is swollen
Swollen coefficient and molybdenum alloy mismatch, and easy to crack to fall off, composite oxide coating complex process, technology are still immature；Noble metal applies
Layer superior performance, rhenium/iridium engine that NASA is developed have been successfully applied to spacecraft, domestic Kunming Institute of Precious Metals etc.
Mechanism is prepared for noble coatings of good performance on refractory metal, but noble coatings preparation cost is expensive, technique and sets
It is standby to require height；Silicide coating is the most common protective coating system of current molybdenum alloy, preparation process relative maturity, coating performance
Reliably and there is good high temperature self-reparing capability, the companies such as external Chromizing, Pfaudler, Rattelle have developed not
With trade mark silicide coating, domestic space material research institute, silicate research institute, the Chinese Academy of Sciences, Ningxia east Tan Ye Co., Ltd,
Large quantities of scientific research institutions such as Central South University have carried out molybdenum alloy silicide coating development work, but pure silicide coating is difficult to completely
1700 DEG C of temperatures above of foot, the use environment for having airflow scouring, are often modified processing to silicide coating at present to improve it
Thermal protective performance.
In current research, Zhang Houan etc. (Authorization Notice No. CN 102534469,2013.11.27) is in situ using three steps
Synthetic method is prepared for the Mo-N-Si-B coating of dense uniform on molybdenum alloy, and effective protection temperature is up to 1600 DEG C；Zhou little Jun etc.
(application publication number CN 104498941 A, 2015.04.08) is molten using slurry using Si, Al, Ni, elements such as w powder as raw material
Burning method is prepared for the silicide coating of complicated component on molybdenum alloy, and static oxidation resistance temperature is up to 1600 DEG C, 1500 DEG C of heat resistanceheat resistants
Number is shaken up to 4000 times；Joachim Disam etc. (US patent, US005776550A, 1998.07.07) melts burning using slurry
Method and plasma spraying method are prepared for B-C-Si antioxidant coating in molybdenum alloy surface, pass through and introduce B and C and improve silicide coating
Antioxygenic property；Zhang Cunmo etc. (Authorization Notice No. CN86103384,1987.11.18) is using infiltration preparation method in molybdenum alloy surface system
Standby Si-Cr-Fe, Si-Cr-Ti, Si-Cr-V coating, can at 1400 DEG C -1500 DEG C long duration protection, at 1600 DEG C -1700
It is protected in short-term at DEG C, and registration coating can not be protected for a long time at 1700 DEG C at present.
Summary of the invention
The purpose of the present invention is obtain a kind of new high temperature resistance oxygen by design alloy formula and its specific preparation process
Change coating alloy raw material and preparation method thereof, the coating and substrate combinating strength that coating material of the present invention obtains are high, while
There is good antioxygenic property at 1700 DEG C.
In order to achieve the object of the present invention, by a large number of experiments research and unremitting effort, following technical solution is finally obtained:
A kind of alloy powder of high temperature resistance oxide covering, is formed by following material composition and content melting: Ni 10-18wt%,
CeO27-15wt%, V 10-20wt%, ZrO25-10wt%, MOSi28-18wt%, B 3-10wt%, surplus Mo.
Preferably, the alloy powder of high temperature resistance oxide covering as described above, by following material composition and content melting
At: Ni 14-17wt%, CeO210-12wt%, V 13-16wt%, ZrO25-8wt%, MoSi212-16wt%, B 4-
7wt%, surplus Mo.
Preferably, the alloy powder of high temperature resistance oxide covering as described above, by following material composition and content melting
At: Ni 15wt%, CeO212wt%, V 15wt%, ZrO27wt%, MoSi214wt%, B 6wt%, surplus Mo.
Preferably, the alloy powder of high temperature resistance oxide covering as described above, content of impurities≤0.005wt%.
In addition, the present invention also provides the preparation methods of the alloy powder of above-mentioned high temperature resistance oxide covering, including walk as follows
It is rapid:
(1) each raw material powder is weighed in proportion, is put it into planetary ball mill, is carried out under inert gas protection mechanical
Alloying；
(2) under protective atmosphere, high temperature sintering, heat temperature raising program are carried out to alloy powder are as follows: first with 50-80 DEG C/min
Rate is warming up to 1200-1350 DEG C, keeps the temperature 30-45min, then be warming up to 1550-1700 DEG C with 15-30 DEG C/min rate, heat preservation
15-30min；
(3) alloy powder after sintering is subjected to ball milling again, after low temperature drying, filters out the conjunction that granularity is 30-80 microns
Bronze material.
It is further preferred that the preparation method of the alloy powder of high temperature resistance oxide covering as described above, ball in step (1)
Powder absolute alcohol is sealed and vacuumized when mill, is filled with argon gas later, suction-qi of chong channel ascending adversely 3-4 times, carries out ball milling later repeatedly,
Ball-milling Time 20-28h.
It is further preferred that the preparation method of the alloy powder of high temperature resistance oxide covering as described above, after ball milling,
The mixture of gained alcohol and powder is placed in a vacuum drying oven carry out low temperature drying.
High temperature resistance oxide covering is prepared the present invention also provides the alloy powder using above-mentioned high temperature resistance oxide covering
Method includes the following steps:
(1) substrate preheating is handled；
(2) alloy powder is sprayed to by matrix surface using plasma spraying method under protective atmosphere, forms coating.
It is further preferred that the method for preparing high temperature resistance oxide coating as described above, step (1) is preceding to matrix surface
It is cleaned, scale removal and each pollutant, Substrate Surface Roughness Ra=0.8-2.0.
It is further preferred that the method for preparing high temperature resistance oxide coating as described above, when step (2) plasma spraying
Powder feeding rate is 20-30g/min, spraying rate 15-30mm/min, spray distance 140-170mm.
It is further preferred that the method for preparing high temperature resistance oxide coating as described above, described matrix is that molybdenum or molybdenum close
Gold.
The present invention compared with the existing technology, has the following technical effect that
(1) the present invention provides a kind of new coating material prescription, which can be used as molybdenum or molybdenum alloy surface high temperature
Antioxidant coating has wide practical use in high temperature protection field；
(2) coating and matrix that the present invention obtains form metallurgical bonding, and bond strength is high, reaches 41-52MPa；
(3) coating is good with matrix thermal matching, and thermal shock resistance is strong, and air-cooled thermal shock number reaches 384-457 times；
(4) there is excellent high-temperature oxidation resistance, 1600 DEG C of static state anti-oxidant service life reach 46-53h, 1700 DEG C of static state
The anti-oxidant service life reaches 21-28h.
(5) coating material of the present invention is prepared simple and easy, can be mass-produced.
Specific embodiment
Technical solution of the present invention is clearly and completely described below with reference to embodiment, the following example is only used for
Illustrate the present invention, and is not construed as limiting the scope of protection of the present invention.In addition, particular technique operating procedure is not specified in embodiment
Or condition person, described technology or conditions or carried out according to the literature in the art according to product description.Examination used
Production firm person is not specified in agent or instrument, and being can be with conventional products that are commercially available.
Embodiment 1
The preparation of high temperature resistance oxide covering alloy raw material:
Step 1: pressing Ni 10wt%, CeO27wt%, V 10wt%, ZrO25wt%, MOSi28wt%, B 3wt%, surplus
Each total 500kg of raw material powder is weighed for the ratio of Mo, is put it into planetary ball mill, is carried out under inert gas protection mechanical
Powder absolute alcohol is sealed and is vacuumized by alloying, when ball milling, is filled with argon gas later, repeatedly suction-qi of chong channel ascending adversely 3-4 times, later
Ball milling is carried out, the mixture of gained alcohol and powder after ball milling, is placed in a vacuum drying oven progress by Ball-milling Time 20h
Low temperature drying；
Step 2: under protective atmosphere, high temperature sintering, heat temperature raising program being carried out to alloy powder are as follows: first with 50 DEG C/min
Rate is warming up to 1350 DEG C, keeps the temperature 30min, then be warming up to 1700 DEG C with 30 DEG C/min rate, keeps the temperature 15min, obtain molten metal；
Step 3: after alloy powder after sintering is repeated mechanical milling process described in step 1 and low temperature drying, filtering out grain
The alloy powder that degree is 30-80 microns.
Embodiment 2
The preparation of high temperature resistance oxide covering alloy raw material:
Step 1: pressing Ni 14wt%, CeO210wt%, V 13wt%, ZrO25wt%, MoSi2It is 12wt%, B 4wt%, remaining
The ratio that amount is Mo weighs each total 200kg of raw material powder, puts it into planetary ball mill, carries out machine under inert gas protection
Powder absolute alcohol is sealed and is vacuumized by tool alloying, when ball milling, is filled with argon gas later, repeatedly suction-qi of chong channel ascending adversely 3-4 times, it
After carry out ball milling, Ball-milling Time 25h, after ball milling, by the mixture of gained alcohol and powder be placed in a vacuum drying oven into
Row low temperature drying；
Step 2: under protective atmosphere, high temperature sintering, heat temperature raising program being carried out to alloy powder are as follows: first with 80 DEG C/min
Rate is warming up to 1200 DEG C, keeps the temperature 45min, then be warming up to 1600 DEG C with 15 DEG C/min rate, keeps the temperature 20min；
Step 3: after alloy powder after sintering is repeated mechanical milling process described in step 1 and low temperature drying, filtering out grain
The alloy powder that degree is 30-80 microns.
Embodiment 3
The preparation of high temperature resistance oxide covering alloy raw material:
Step 1: pressing Ni 15wt%, CeO212wt%, V 15wt%, ZrO27wt%, MoSi2It is 14wt%, B 6wt%, remaining
The ratio that amount is Mo weighs each total 600kg of raw material powder, puts it into planetary ball mill, carries out machine under inert gas protection
Powder absolute alcohol is sealed and is vacuumized by tool alloying, when ball milling, is filled with argon gas later, repeatedly suction-qi of chong channel ascending adversely 3-4 times, it
After carry out ball milling, Ball-milling Time 28h, after ball milling, by the mixture of gained alcohol and powder be placed in a vacuum drying oven into
Row low temperature drying；
Step 2: under protective atmosphere, high temperature sintering, heat temperature raising program being carried out to alloy powder are as follows: first with 60 DEG C/min
Rate is warming up to 1300 DEG C, keeps the temperature 40min, then be warming up to 1650 DEG C with 20 DEG C/min rate, keeps the temperature 25min；
Step 3: after alloy powder after sintering is repeated mechanical milling process described in step 1 and low temperature drying, filtering out grain
The alloy powder that degree is 30-80 microns.
Embodiment 4
The preparation of high temperature resistance oxide covering alloy raw material:
Step 1: pressing Ni 17wt%, CeO212wt%, V 16wt%, ZrO28wt%, MoSi2It is 16wt%, B 7wt%, remaining
The ratio that amount is Mo weighs each total 500kg of raw material powder, puts it into planetary ball mill, carries out machine under inert gas protection
Powder absolute alcohol is sealed and is vacuumized by tool alloying, when ball milling, is filled with argon gas later, repeatedly suction-qi of chong channel ascending adversely 3-4 times, it
After carry out ball milling, Ball-milling Time 28h, after ball milling, by the mixture of gained alcohol and powder be placed in a vacuum drying oven into
Row low temperature drying；
Step 2: under protective atmosphere, high temperature sintering, heat temperature raising program being carried out to alloy powder are as follows: first with 70 DEG C/min
Rate is warming up to 1350 DEG C, keeps the temperature 340min, then be warming up to 1700 DEG C with 20 DEG C/min rate, keeps the temperature 15min；
Step 3: after alloy powder after sintering is repeated mechanical milling process described in step 1 and low temperature drying, filtering out grain
The alloy powder that degree is 30-80 microns.
Embodiment 5
The preparation of high temperature resistance oxide covering alloy raw material:
Step 1: pressing Ni 18wt%, CeO215wt%, V 20wt%, ZrO210wt%, MOSi218wt%, B 10wt%,
The ratio that surplus is Mo weighs each raw material powder 400kg, puts it into planetary ball mill, carries out machine under inert gas protection
Powder absolute alcohol is sealed and is vacuumized by tool alloying, when ball milling, is filled with argon gas later, repeatedly suction-qi of chong channel ascending adversely 3-4 times, it
After carry out ball milling, Ball-milling Time 22h, after ball milling, by the mixture of gained alcohol and powder be placed in a vacuum drying oven into
Row low temperature drying；
Step 2: under protective atmosphere, high temperature sintering, heat temperature raising program being carried out to alloy powder are as follows: first with 50 DEG C/min
Rate is warming up to 1350 DEG C, keeps the temperature 30min, then be warming up to 1700 DEG C with 20 DEG C/min rate, keeps the temperature 20min；
Step 3: after alloy powder after sintering is repeated mechanical milling process described in step 1 and low temperature drying, filtering out grain
The alloy powder that degree is 30-80 microns.
Embodiment 6
Using molybdenum alloy plate as matrix, its surface scale is mechanically removed, then be cleaned by ultrasonic with dehydrated alcohol,
Surface roughness Ra=1.5, the alloy powder being prepared using embodiment 1-5 are placed in spray as spraying raw material, by matrix after cleaning
It applies station and matrix is first preheated into 50min at 400 DEG C under protection of argon gas, then carry out plasma spraying, plasma spraying
When powder feeding rate be 30g/min, spraying rate 25mm/min, spray distance 160mm, it is naturally cold in air after spraying
But to room temperature, high temperature resistance oxide covering is obtained.
Above-mentioned five sample coatings surfaces are observed, coating dense uniform, surfacing is found, detects respective results of property such as
Shown in following table.
Comparative example 1
On the basis of embodiment 5, other parameters are constant, only feed change powder proportions are as follows: (1) Ni 8wt%,
CeO25wt%, V 8wt%, ZrO24wt%, MOSi26wt%, B 3wt%, surplus Mo；(2) Ni 20wt%,
CeO220wt%, V 30wt%, ZrO215wt%, MOSi220wt%, B 15wt%, surplus Mo；Respectively obtain coating alloy
Powder, then as coating material, the molybdenum alloy sample of the coating containing same thickness is obtained according to 6 the method for embodiment, it detects
It was found that it is 35MPa that respective performance, which is (1) floating coat bond strength, air-cooled thermal shock number (1600 DEG C of heat preservation 30min- room temperatures) 224,
The anti-oxidant service life 32h of 1600 DEG C of static state, the anti-oxidant service life 13h of 1700 DEG C of static state；(2) floating coat bond strength 43MPa, air-cooled heat
Shake number (1600 DEG C of heat preservation 30min- room temperatures) 327,1600 DEG C of anti-oxidant service life 45h of static state, 1700 DEG C of static state anti-oxidant service life
22h。
Comparative example 2
Preparation process and parameter are identical as embodiment 1, are different in by Ni 10wt%, CeO27wt%, V
10wt%, ZrO25wt%, Si 15wt%, B 7wt%, Hf 25wt%, the ratio that surplus is Mo weigh each raw material powder, obtain
It to alloy powder, then sprays to obtain the molybdenum alloy sample of the coating containing same thickness according to 6 method of embodiment as raw material, detect
It was found that anchoring strength of coating is 34MPa, 289,1600 DEG C of air-cooled thermal shock number (1600 DEG C of heat preservation 30min- room temperatures) static antioxygens
Change service life 38h, the anti-oxidant service life 17h of 1700 DEG C of static state.
Comparative example 3
Each raw material is weighed according to the material rate of embodiment 1, is put it into planetary ball mill, under inert gas protection
Wet ball grinding is carried out, ball-milling medium is dehydrated alcohol, Ball-milling Time 20h, revolving speed 300r/min, after ball milling that slurry is uniform
Coated in molybdenum alloy surface, the coating embryo material with a thickness of 300-500 microns is formed, is subsequently placed in baking oven drying, drying is placed on
Vacuum sintering furnace is sintered, and is first warming up to 1200 DEG C with 10 DEG C/min heating rate when vacuum-sintering, keeps the temperature 45min, then with
20 DEG C/min heating rate is warming up to 1650 DEG C, obtains molybdenum alloy surface coating.
Detection discovery anchoring strength of coating be 33MPa, air-cooled thermal shock number (1600 DEG C of heat preservation 30min- room temperatures) 184,
The anti-oxidant service life 23h of 1600 DEG C of static state, the anti-oxidant service life 9h of 1700 DEG C of static state.
Comparative example 4
On that basis of example 1, alloy powder step 1 obtained is directly as plasma spraying raw material, according still further to reality
It applies 6 process of example to be sprayed, obtains sample, detection discovery anchoring strength of coating is 35MPa, air-cooled thermal shock number (1600 DEG C of guarantors
Warm 30min- room temperature) 167,1600 DEG C of anti-oxidant service life 21h of static state, the anti-oxidant service life 8h of 1700 DEG C of static state.
Claims (9)
1. a kind of high temperature resistance oxide covering alloy powder, it is characterised in that formed by following material composition and content melting: Ni
10-18wt%, CeO27-15wt%, V 10-20wt%, ZrO25-10wt%, MOSi2It is 8-18wt%, B 3-10wt%, remaining
Amount is Mo.
2. high temperature resistance oxide covering alloy powder according to claim 1, it is characterised in that by following material composition and contain
Amount melting forms: Ni 14-17wt%, CeO210-12wt%, V 13-16wt%, ZrO25-8wt%, MoSi2 12-
16wt%, B 4-7wt%, surplus Mo.
3. high temperature resistance oxide covering alloy powder according to claim 2, it is characterised in that by following material composition and contain
Amount melting forms: Ni 15wt%, CeO212wt%, V 15wt%, ZrO27wt%, MoSi214wt%, B 6wt%, surplus
For Mo.
4. a kind of preparation method of the high temperature resistance oxide covering alloy powder as described in claims 1 or 2 or 3, it is characterised in that
Include the following steps:
(1) each raw material powder is weighed in proportion, is put it into planetary ball mill, carries out mechanical alloy under inert gas protection
Change；
(2) under protective atmosphere, high temperature sintering, heat temperature raising program are carried out to alloy powder are as follows: first with 50-80 DEG C/min rate
It is warming up to 1200-1350 DEG C, 30-45min is kept the temperature, then be warming up to 1550-1700 DEG C with 15-30 DEG C/min rate, keeps the temperature 15-
30min；
(3) alloy powder after sintering is subjected to ball milling again, after low temperature drying, filters out the alloyed powder that granularity is 30-80 microns
Material.
5. the preparation method of high temperature resistance oxide covering alloy powder according to claim 4, it is characterised in that: step (1)
Powder absolute alcohol is sealed and vacuumized when middle ball milling, is filled with argon gas later, suction-qi of chong channel ascending adversely 3-4 times, carries out ball later repeatedly
Mill, Ball-milling Time 20-28h.
6. the preparation method of high temperature resistance oxide covering alloy powder according to claim 5, it is characterised in that: ball milling terminates
Afterwards, the mixture of gained alcohol and powder is placed in a vacuum drying oven carry out low temperature drying.
7. a kind of prepare high temperature resistance oxide covering using the high temperature resistance oxide covering alloy powder of claims 1 or 22 or 3
Method, it is characterised in that include the following steps:
(1) substrate preheating is handled；
(2) alloy powder is sprayed to by matrix surface using plasma spraying method under protective atmosphere, forms coating.
8. preparing the method for high temperature resistance oxide covering according to claim 7, it is characterised in that: to matrix before step (1)
Surface is cleaned, scale removal and each pollutant, Substrate Surface Roughness Ra=0.8-2.0.
9. preparing the method for high temperature resistance oxide covering according to claim 7, it is characterised in that: step (2) plasma spray
Powder feeding rate is 20-30g/min, spraying rate 15-30mm/min, spray distance 140-170mm when painting.
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| CN111172530A (en) * | 2020-01-17 | 2020-05-19 | 江苏理工学院 | Method for repairing silicide coating on surface of Mo alloy sheet |
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| CN102041499A (en) * | 2009-10-18 | 2011-05-04 | 中国科学院上海硅酸盐研究所 | Molybdenum disilicide composite coating and preparation method thereof |
| CN102828137A (en) * | 2012-08-31 | 2012-12-19 | 华南理工大学 | High-temperature alloy surface nanometer composite coating and preparation method thereof |
| CN106119829A (en) * | 2016-07-22 | 2016-11-16 | 中南大学 | A kind of molybdenum alloy high-temperature oxidation resistant Mo Hf Si coating and preparation method thereof |
| CN107904544A (en) * | 2017-11-08 | 2018-04-13 | 宝鸡文理学院 | A kind of preparation method of refractory metal surfaces antioxidant coating |
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