CN104099608B - The method of Cu-Ag-Zn abradable seal coating is prepared in a kind of cold spraying - Google Patents
The method of Cu-Ag-Zn abradable seal coating is prepared in a kind of cold spraying Download PDFInfo
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- CN104099608B CN104099608B CN201310123242.5A CN201310123242A CN104099608B CN 104099608 B CN104099608 B CN 104099608B CN 201310123242 A CN201310123242 A CN 201310123242A CN 104099608 B CN104099608 B CN 104099608B
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- 238000000576 coating method Methods 0.000 title claims abstract description 85
- 239000011248 coating agent Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010288 cold spraying Methods 0.000 title claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 59
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000011159 matrix material Substances 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 28
- 239000003570 air Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- -1 and during spraying Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000005422 blasting Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000007751 thermal spraying Methods 0.000 abstract description 4
- 238000005275 alloying Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract description 2
- 230000008439 repair process Effects 0.000 abstract description 2
- 229910000881 Cu alloy Inorganic materials 0.000 abstract 1
- 239000012159 carrier gas Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 10
- 229910017944 Ag—Cu Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of method that Cu Ag Zn abradable seal coating is prepared in cold spraying, belong to high-temperature alloy protecting coating preparing technical field.Cu Ag Zn alloy powder after the method uses cold spray apparatus to dry sprays to surface on the high temperature alloy DZ445 matrix of blasting treatment, thus the Cu Ag Zn abradable seal coating obtaining stable components, being well combined.Result shows, cold spraying is a kind of effective ways preparing Ag Cu alloy abradable seal coating, compare compared with existing thermal spraying Ag Cu alloying technology and not only there is the features such as coating layer thickness is big, fine and close and base material adhesion is strong, protection effect is good, the most also there is coating and be substantially not present oxidation and carry out the advantages such as field repair for coating local shedding.Coating of the present invention plays the effect of obturaging of middle low temperature, and design temperature is about 400 DEG C.
Description
Technical field
The present invention relates to high-temperature alloy protecting coating technical field, be specifically related to a kind of cold spraying and prepare Cu-Ag-Zn
The method of abradable seal coating.
Background technology
For improving the efficiency of aero-engine, reducing oil consumption.Compressor, turbine tip and machine should be reduced as far as possible
Gap between casket.The gas circuit technology of obturaging is to improve the important means one of engine performance.Abradable seal coating
Owing to its production technology is easy, it is easy with tuning performance to reprocess, obturages effective and be applied.Seal coating
Mostly it is made up of a certain proportion of metal phase and the nonmetallic composite with self-lubricating function, wherein also has
More hole.Requiring that coating is softer, make blade tip easy scraping coating and not damaged blade, i.e. had grinds
Consumption;The most also require that coating has certain hardness.Electromotor high speed air-flow and solids thereof can be resisted
Wash away, i.e. require the erosion wear resistance having had;It is also required that the bond strength that coating has had.It is typically employed in
Armature spindle, drum letter, axle, moving blade blade tip, obturaging between compressor and turbine fill surface, between controlling
Gap, reduces leakage.External existing nearly 20 kinds of abradable seal coating powders for electromotor different parts.
Domestic spraying by the technological parameter provided mainly from external import powder, quality control index is only hardness.
Therefore, it is necessary to coating powder, spraying coating process and coating performance are carried out systematic study.Have studied several herein
Middle low temperature abradable seal coating powder, technique and key property.
Cold spraying (also known as cold air power spraying and coating) is to make it under complete solid-state with compressed gas-driven metallic
With high velocity collision substrate, make particle that violent plastic deformation to occur and the one of formation of deposits coating is novel
Spraying technology.Cold spraying has the feature of solid deposited under low temperature, can significantly reduce and even completely eliminate tradition
In thermal spraying, oxidation, phase transformation, segregation, residual tension and crystal grain such as are grown up at the adverse effect.
In recent years, flame-spraying and plasma spraying are prepared Ag-Cu alloy and are obturaged painting to have had thermal spraying to include
The report of layer, but coating quality is the highest, and there is obvious hole with the interface of matrix in coating, coating itself is the most not
Fine and close.And this Ag-Cu alloy seal coating is only applicable to the dish axle below 400 DEG C and obturages ring.
Summary of the invention
It is an object of the invention to provide a kind of method that cold spray technique prepares Cu-Ag-Zn seal coating, solve existing
Prepare, with the presence of plasma spray technology, the problem that coating quality during Ag-Cu alloy seal coating is poor, open up a kind of new
The effective way preparing Ag-Cu alloy seal coating, to obtaining actual application early.
Technical solution of the present invention is as follows:
The method of Cu-Ag-Zn abradable seal coating is prepared in a kind of cold spraying, and the method is with Cu-Ag-Zn alloy
Powder is raw material, uses cold spray technique to prepare Cu-Ag-Zn abradable seal on high temperature alloy DZ445 matrix
Coating.
During described employing cold spray technique prepares Cu-Ag-Zn abradable seal coating, use with gas
The cold spray apparatus of heater, during spraying, gas heating-up temperature is 200~550 DEG C, spray gas can use air,
Nitrogen or argon, during spraying, gas pressure is 1.5~2.5MPa, and spray distance is 10~30mm.
Described its chemical composition of Cu-Ag-Zn alloy powder is by weight percentage: Cu:40%~60%, Ag:
10~30%, Zn: surplus;Described Cu-Ag-Zn alloy powder is prepared by gas-atomized powder method.
Described Cu-Ag-Zn alloy powder, its granularity requirements is: granularity < its quality hundred of the alloy powder of 35 μm
Divide content less than < 10%, its weight/mass percentage composition of the alloy powder of granularity 35 μm~45 μm is more than 90%, surplus
For granularity > alloy powder of 45 μm.
The composition of described high temperature alloy DZ445 is by weight percentage: C :~0.07%, Cr :~12.96%, Co:
~9.83%, W :~4.55%, Mo :~1.75%, Al :~4.11%, Ti :~2.29%, Ta :~4.82%, Mn: < 0.05%,
Si: < 0.10%, P: < 0.005%, S: < 0.003%, Fe: < 0.05%, Cu: < 0.02%, remaining is trace.
The thickness of described Cu-Ag-Zn abradable seal coating is 50~500 μm.
The said method cold spray apparatus with gas heater used includes gas heater, powder feeder, spray gun
And control system;Wherein: utilize compressed air powder feeding and powder is accelerated, driving gas and carrier gas to be pressed by maximum
The air compressor machine of power 3.0MPa provides, and carrier gas is heated by described gas heater, and the carrier gas after heating is in spray
In rifle, the powder with powder feeder conveying mixes mutually, can pre-heating powder and carrier gas expansion acceleration, spray gun in spray gun
It is vertically fixed on support;Sample is the motion of relative spray gun on X-Y two-dimension moving platform.
Design principle of the present invention is as follows:
The coating that defect to be obtained is few, quality is high needs to formulate a whole set of rational technological parameter.Although to carrier gas
Body adds heat energy makes the speed of particle increase, thus increases the kinetic energy of particle to such an extent as to be more prone to tie with matrix
Close, but the too high meeting of carrier gas temperature causes the crystal grain within powder particle to be grown up, deteriorate the performance of sprayed particle;With
Time, spraying particle can be made to melt in spray gun, block spray gun.Certainly, gas temperature can not be the lowest,
Otherwise it is unfavorable for the acceleration of sprayed particle.In the case of gas temperature reduces, spraying particle to be made deposits,
Need to increase gas pressure, and gas pressure is limited to the ability of equipment.
The deposition of coating of the present invention is to complete on the cold spray apparatus with gas heater.Equipment is operationally
It still is based on aerodynamic principle, utilizes gases at high pressure (He, N2, mixed gas or air) carry powder
Produce supersonic speed two-phase flow after the scaled pipe of granule, under complete solid-state, clash into matrix, by bigger plasticity stream
Dynamic deformation and be deposited on matrix surface formation coating.Spray gun utilizes Laval nozzle principle design.Spraying
During, when the speed of particle exceedes its corresponding critical velocity, after particle encounter, it is deposited on matrix surface,
Form coating;Otherwise, erosion phenomenon will occur.
Advantages of the present invention and having the beneficial effect that:
1, the present invention is in order to improve the quality of coating, obtains the coating being tightly combined and itself is fine and close with matrix,
Have employed the cold spray apparatus with gas heater, powder feeder Cu-Ag-Zn alloyed powder out is added
Heat, to reach to soften powder, increases the ability of its plastic deformation, obturages obtaining high-quality Cu-Ag-Zn
Coating.Use cold spraying one step to be obtained with high-quality coating, eliminate follow-up heat treatment, i.e. save
Operation reduces again cost, has a wide range of applications.
2, the inventive method can be prevented effectively from the oxidation of Cu-Ag-Zn alloy powder in spraying process, to material
Material organizational structure impact is little, remains composition and the structure of original dusty spray, does not produce impurity phase.Cold spraying
Cu-Ag-Zn alloy powder used can realize reclaiming completely substantially, substantial saving in spraying powder.Result
Showing, cold spraying is a kind of effective ways preparing Cu-Ag-Zn abradable seal coating.
3, cold spraying Cu-Ag-Zn coating process of the present invention more existing thermal spraying Ag-Cu alloying technology is compared not only
There is the features such as coating layer thickness is big, fine and close and base material adhesion is strong, protection effect is good, the most also there is coating
Be substantially not present oxidation and the local shedding phenomenon that is likely to occur for coating to carry out field repair etc. excellent
4, Cu-Ag-Zn abradable seal coating prepared by the present invention plays the effect of obturaging of middle low temperature, design point temperature
Being about 400 DEG C, washed away and blade scraping casing vibrations stress by pneumatic, working media is air.The present invention
Fill up technological gap, there is the most preferably technique effect.
Accompanying drawing explanation
Fig. 1 is cold spray apparatus schematic diagram used by the present invention;In figure: 1-control system, 2-gas heater,
3-workbench, 4-de Lavel spray gun, 5-powder feeder.
Fig. 2 is the stereoscan photograph of cold spraying Cu-Ag-Zn seal coating of the present invention;In figure: (a) sprays temperature
The Cross Section Morphology of coating when degree is 300 DEG C, spray pressure is 1.5MPa;B () spraying temperature is 350 DEG C, spray
It is coated with the Cross Section Morphology of coating when pressure is 1.5MPa;C () spraying temperature is 400 DEG C, spray pressure is 1.8MPa
Time coating Cross Section Morphology;The cross section shape of coating when d () spraying temperature is 450 DEG C, spray pressure is 1.8MPa
Looks;The Cross Section Morphology of coating when e () spraying temperature is 500 DEG C, spray pressure is 2.0MPa;(f) spraying temperature
Be 550 DEG C, spray pressure Cross Section Morphology of coating when being 2.1MPa.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment describe in detail the present invention.
As it is shown in figure 1, the cold spraying system with gas heater includes gas heater 2, powder feeder 5, spray
Rifle 4 and control system 1;Utilize compressed air powder feeding and powder is accelerated, driving gas and carrier gas to be pressed by maximum
The air compressor machine of power 3.0MPa provides, and carrier gas is heated by described gas heater 2, and the carrier gas after heating exists
In spray gun 4, the powder with powder feeder 5 conveying mixes mutually, can pre-heating powder and carrier gas expansion add in spray gun 4
Speed, spray gun is vertically fixed on support;Sample is at the upper relative spray gun of X-Y two-dimension moving platform (workbench 3)
Motion.
In the present invention, spraying raw material selects Cu-Ag-Zn alloyed powder, and spraying base material is high temperature alloy DZ445.
Spraying equipment is the above-mentioned cold spraying system with gas heater.Concrete technology parameter is as follows: carrier gas preheating temperature
Degree is 200~550 DEG C, and spray distance is 10~30mm, and spray pressure is 1.5~2.5MPa.Before spraying, matrix
Should first use acetone, ethanol oil removing, then carry out sandblasting roughening treatment with the white fused alumina of 24 mesh.
The Cu-Ag-Zn alloyed powder that spraying raw material is selected, its chemical composition is by weight percentage: Cu:
40%~60%, Ag:10~30%, Zn: surplus;This alloy powder is prepared by gas-atomized powder method.
Described Cu-Ag-Zn alloy powder, its granularity requirements is: granularity < its quality hundred of the alloy powder of 35 μm
Divide content<10%, its weight/mass percentage composition of the alloy powder of granularity 35 μm~45 μm>90%, granularity>45 μm
Alloy powder be surplus.
Embodiment 1
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:45%, Ag:28%,
Zn:27%;Selecting compressed air as blasting medium, spray pressure is 2.0MPa, and spraying temperature is 250 DEG C,
Spray distance is 25mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
The porosity of standby Cu-Ag-Zn coating is shown in Table 1, and Vickers hardness is shown in Table 2, is shown in Table with the adhesion intensity of matrix
3。
Embodiment 2
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:50%, Ag:25%,
Zn:25%;Selecting compressed air as blasting medium, spray pressure is 1.5MPa, and spraying temperature is 300 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (a), coating porosity is shown in Table 1, Vickers
Hardness is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
Embodiment 3
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:50%, Ag:25%,
Zn:25%;Selecting compressed air as blasting medium, spray pressure is 1.5MPa, and spraying temperature is 350 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (b), coating porosity is shown in Table 1, Vickers
Hardness is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
Embodiment 4
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:50%, Ag:25%,
Zn:25%;Selecting compressed air as blasting medium, spray pressure is 1.8MPa, and spraying temperature is 400 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (c), coating porosity is shown in Table 1, Vickers
Hardness is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
Embodiment 5
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:50%, Ag:25%,
Zn:25%;Selecting compressed air as blasting medium, spray pressure is 1.8MPa, and spraying temperature is 450 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (d), coating porosity is shown in Table 1, Vickers
Hardness is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
Embodiment 6
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:50%, Ag:25%,
Zn:25%;Selecting compressed air as blasting medium, spray pressure is 2.0MPa, and spraying temperature is 500 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (e), coating porosity is shown in Table 1, Vickers
Hardness is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
Embodiment 7
Spraying raw material Cu-Ag-Zn alloyed powder, its chemical composition is by weight percentage: Cu:42%, Ag:25%,
Zn:33%;Selecting compressed air as blasting medium, spray pressure is 2.1MPa, and spraying temperature is 550 DEG C,
Spray distance is 20mm, uses cold spraying to prepare Cu-Ag-Zn seal coating on DZ445 matrix.Made
In the stereoscan photograph such as Fig. 2 of standby Cu-Ag-Zn coating shown in (f), coating porosity is shown in Table 1, and Vickers is hard
Degree is shown in Table 2, is shown in Table 3 with the adhesion intensity of matrix.
The porosity contrast of Cu-Ag-Zn seal coating under the different cold spray process of table 1
The Vickers hardness of Cu-Ag-Zn seal coating under the different cold spray process of table 2
Cu-Ag-Zn seal coating and the bond strength of matrix under the different cold spray process of table 3
Claims (3)
1. the method that Cu-Ag-Zn abradable seal coating is prepared in a cold spraying, it is characterised in that: the method
It is with Cu-Ag-Zn alloy powder as raw material, uses cold spray technique to prepare on high temperature alloy DZ445 matrix
Cu-Ag-Zn abradable seal coating;Cold spray technique is used to prepare the mistake of Cu-Ag-Zn abradable seal coating
Cheng Zhong, uses the cold spray apparatus with gas heater, and during spraying, gas heating-up temperature is 200~550 DEG C,
Spray gas uses air, nitrogen or argon, and during spraying, gas pressure is 1.5~2.5MPa, and spray distance is
10~30mm;
Described its chemical composition of Cu-Ag-Zn alloy powder is by weight percentage: Cu:40%~60%, Ag:
10~30%, Zn: surplus.
2. want the method preparing Cu-Ag-Zn abradable seal coating described in 1 according to right, it is characterised in that:
Described Cu-Ag-Zn alloy powder, its granularity requirements is: < its percent mass of the alloy powder of 35 μm contains granularity
Amount is less than 10%, and its weight/mass percentage composition of the alloy powder of granularity 35 μm~45 μm is more than 90%, and surplus is grain
Degree > alloy powder of 45 μm.
The method preparing Cu-Ag-Zn abradable seal coating the most according to claim 1, its feature exists
In: the thickness of described Cu-Ag-Zn abradable seal coating is 50~500 μm.
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CN108078363B (en) * | 2016-11-22 | 2021-06-15 | 佛山市顺德区美的电热电器制造有限公司 | Method for shielding cold spraying of cookware, cookware prepared by method and cooking utensil |
CN107761092B (en) * | 2017-11-08 | 2019-03-22 | 新疆亚中易德环保科技有限公司 | A kind of aerodynamic force spraying copper alloy coating intensifying method |
CN112157269B (en) * | 2020-09-24 | 2021-11-26 | 四川大学 | Preparation method of cold spray coating based on heat treatment of aluminum alloy powder |
CN113201733B (en) * | 2021-04-25 | 2022-11-15 | 西安建筑科技大学 | Composite material with abradable seal coating and preparation method thereof |
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CN1781644A (en) * | 2004-11-30 | 2006-06-07 | 宝山钢铁股份有限公司 | Repairing method for thin belt continuous casting crystallining roller |
CN101698364A (en) * | 2009-11-03 | 2010-04-28 | 西安交通大学 | Thermal barrier coating and preparation technology thereof |
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US20080078268A1 (en) * | 2006-10-03 | 2008-04-03 | H.C. Starck Inc. | Process for preparing metal powders having low oxygen content, powders so-produced and uses thereof |
US20080286459A1 (en) * | 2007-05-17 | 2008-11-20 | Pratt & Whitney Canada Corp. | Method for applying abradable coating |
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CN1781644A (en) * | 2004-11-30 | 2006-06-07 | 宝山钢铁股份有限公司 | Repairing method for thin belt continuous casting crystallining roller |
CN101698364A (en) * | 2009-11-03 | 2010-04-28 | 西安交通大学 | Thermal barrier coating and preparation technology thereof |
Non-Patent Citations (1)
Title |
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真空雾化制备Ag-Zn-Cu粉末的性能研究;于世连 等;《矿冶》;20100331;第19卷(第1期);第70-72页 * |
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