CN1306097A - Process for preparing coated alimina-base layer of ceramics by reactive spray - Google Patents
Process for preparing coated alimina-base layer of ceramics by reactive spray Download PDFInfo
- Publication number
- CN1306097A CN1306097A CN00100504A CN00100504A CN1306097A CN 1306097 A CN1306097 A CN 1306097A CN 00100504 A CN00100504 A CN 00100504A CN 00100504 A CN00100504 A CN 00100504A CN 1306097 A CN1306097 A CN 1306097A
- Authority
- CN
- China
- Prior art keywords
- powder
- diaspore
- spraying
- gram
- flame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims description 21
- 239000000919 ceramic Substances 0.000 title description 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000843 powder Substances 0.000 claims abstract description 40
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000005507 spraying Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000005524 ceramic coating Methods 0.000 claims abstract description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011247 coating layer Substances 0.000 claims abstract description 10
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims abstract description 7
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910001648 diaspore Inorganic materials 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 13
- 239000011812 mixed powder Substances 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 238000005480 shot peening Methods 0.000 claims description 8
- 229910002706 AlOOH Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 229910017119 AlPO Inorganic materials 0.000 claims description 4
- 229910000989 Alclad Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 7
- 229940001007 aluminium phosphate Drugs 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 229940098458 powder spray Drugs 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000237502 Ostreidae Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000007516 brønsted-lowry acids Chemical class 0.000 description 1
- 150000007528 brønsted-lowry bases Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
A process for spraying the alumina-based ceramic coating layer on the surface of metal or its alloy features that the sprayed coating powder contains monohydrargillite powder and one or more of TiO2 CeO2 and aluminium phosphate, and the flame powder spray method is used. Its advantaegs include simple process and high performance of coated layer.
Description
The invention belongs to technical field of surface, particularly a kind of technology is simple relatively, cost is relatively low, the ceramic coating technology of preparing of applied range.
The surface ceramic coat technology is being brought into play effect day by day significantly aspect the high-performance surface providing to have.Aluminum oxide is the oxide ceramic coating material of using always.The kind of aluminum oxide has a variety of, wherein with α-Al
2O
3Over-all properties the best.α-Al
2O
3Claiming corundum again, is inert compound, has the firmest and the finest and close lattice, and Mohs' hardness reaches 9, and its chemical property is also the most stable, even at high temperature also be difficult to and the bronsted lowry acids and bases bronsted lowry reaction, thereby excellent anti-corrosion performance.α-Al
2O
3More rare at nature, the final product when it is the heating of various hydrated aluminas.Because α-Al
2O
3The fusing point height of pottery, chemical stability is good, and has good performance such as wear-resisting, high temperature resistant, anti-corrosion, and it is of wide application, but α-Al
2O
3Cost higher.
Present existing preparation α-Al
2O
3The method of aluminium oxide ceramic coating layer mainly is a hot-spraying techniques, and wherein using more is plasma spraying technology and flame powder spraying technology.Plasma spraying technology is that the plasma that produces with arc-over is as thermal source, gun nozzle can obtain 18000 degrees centigrade high temperature usually, make dusty spray fusing or softening, and under plasma flame flow is quickened, blow to workpiece surface formation and the good coating of matrix bond.Plasma spray coating process equipment and auxiliary facility are expensive complicated, coating preparation cost height, and also also very high to operator's requirement.Flame powder spraying be with certain inflammable gas as thermal source, after the powder heating, under action of high-speed airflow, powder spraying is formed coating in workpiece surface, gun nozzle can obtain the high temperature about 3000 degrees centigrade usually.Compare with plasma spraying technology, the alumina ceramic coating over-all properties that the flame powder spraying obtains is relatively poor, but because equipment and technology are simple relatively, the spraying cost is low, and might be implemented in on-site preparation alumina ceramic coating under the actual working conditions, thereby also has suitable wide applications.
The objective of the invention is for overcoming the weak point of prior art, utilize flame powder reactive spray method, adopting main component is that the mixed powder of diaspore is as spray material, on metallic matrix, prepare aluminium oxide ceramic coating layer, make it have equipment and technology is simple relatively, the spraying cost is low, spray material wide material sources, cheap advantage.
A kind of method of utilizing reactive spray to prepare aluminium oxide ceramic coating layer that the present invention proposes, it is characterized in that: adopt the diaspore powder as spray material, utilize the method for flame powder spraying, prepare aluminium oxide ceramic coating layer at metal and alloy surface thereof.
Said diaspore powder can adopt diaspore ore to make powder through crushing screening, clean to remove impurity with acid solution again, and dries in stove and make.
Said spray material also is in addition one or more mixed powders for batching in titanium dioxide, cerium dioxide, the aluminum phosphate of main component with the diaspore, and the composition range of wherein said mixed powder is: to prepare 1000 gram mixed powders is example
Titanium dioxide TiO
2The 0-150 gram
Cerium dioxide CeO
2The 0-20 gram
Aluminum phosphate AlPO
4The 0-30 gram
Diaspore β-AlOOH supplies surplus.
Method of the present invention can specifically may further comprise the steps:
1) the metal or alloy workpiece surface to required spraying carries out shot peening;
2) method with the flame powder spraying sprays one deck nickel alclad bottom at the workpiece surface after shot peening, and thickness is less than 0.1mm;
3) method of above-mentioned spray material with the flame powder spraying is sprayed on the workpiece surface, thickness is less than 0.7mm.
Principle of the present invention is to utilize the pyrolysis of diaspore under the certain temperature condition, the preparation aluminium oxide ceramic coating layer.(β-AlOOH) is common hydrated alumina to diaspore, and in the explored bauxite reserves of China, the diaspore type bauxite reserves account for 98.46% of national total reserves, thereby raw material easily gets, and cheap.When diaspore is heated to 400 ℃ in atmosphere, can directly be decomposed into α-Al
2O
3In various hydrated aluminas, diaspore is to α-Al
2O
3Transition temperature minimum.During the roasting diaspore, generate the bad α-Al of crystallization at a lower temperature
2O
3, its lattice is in a kind of imperfect as yet transition state, and chemically reactive is than general α-Al
2O
3Much higher with the diaspore before the roasting.But along with the raising of maturing temperature and the prolongation of time, α-Al
2O
3Lattice heal and become perfect, its chemically reactive sharply reduces.The mixed powder that mainly contains diaspore as spray material, is utilized the method for flame powder spraying, and the diaspore decomposes generates with α-Al in spraying process
2O
3Be main alumina material, form aluminium oxide ceramic coating layer at workpiece surface.
Characteristics of the present invention are:
1, it is simple relatively to have kept flame powder spraying method equipment and technology, the low characteristics of spraying cost;
2, (β-AlOOH) powder is as spraying raw material, and cost is lower than conventional direct employing α-Al to adopt diaspore
2O
3The flame powder spraying coating process of powder;
3, diaspore has experienced following process in spraying process:
Diaspore (chemically reactive the is low) → bad α-Al of generation crystallization
2O
3(character is imperfect, the chemically reactive height) → α-Al
2O
3Lattice become perfect (chemically reactive sharply reduces).
Because dusty spray has experienced a stage that chemically reactive is high, will form more good binding between the powder particle and between powder and the body material, so coating performance will obtain also to improve.
Embodiment 1
1, the diaspore ore crushing screening is made powder;
2, above-mentioned diaspore powder is cleaned removal impurity with hydrochloric acid soln, and in stove, dry;
3, according to following ratio preparation mixed powder:
Titanium dioxide TiO
2120 grams
Cerium dioxide CeO
25 grams
Aluminum phosphate AlPO
410 grams
Diaspore β-AlOOH 865 grams
4, shot peening is carried out on the steel 45 test specimen surfaces of required spraying;
5, the method with the oxy-acetylene flame powder spraying sprays one deck nickel alclad bottom at the workpiece surface after shot peening, and thickness is 0.1mm;
6, the mixed powder of the above-mentioned preparation method with the oxy-acetylene flame powder spraying is sprayed on the workpiece surface, the gained coat-thickness is 0.5mm, and appearance color is a lead, and the X-ray diffraction result shows that the coating main component is an aluminum oxide.
Embodiment 2
1, the diaspore ore crushing screening is made powder;
2, above-mentioned diaspore powder is cleaned removal impurity with hydrochloric acid soln, and in stove, dry;
3, according to following ratio preparation mixed powder:
Cerium dioxide CeO
21 gram
Aluminum phosphate AlPO
42 grams
Diaspore β-AlOOH 997 grams
4, shot peening is carried out on the steel 45 test specimen surfaces of required spraying;
5, the method with the oxy-acetylene flame powder spraying sprays one deck nickel alclad bottom at the workpiece surface after shot peening, and thickness is 0.1mm; Spray parameters is:
6, the mixed powder of the above-mentioned preparation method with the oxy-acetylene flame powder spraying is sprayed on the workpiece surface, the gained coat-thickness is 0.2mm, and appearance color is a light oyster white, and the X-ray diffraction result shows that the coating main component is an aluminum oxide.
Embodiment 3
1, the diaspore ore crushing screening is made powder;
2, above-mentioned diaspore powder is cleaned removal impurity with hydrochloric acid soln, and in stove, dry;
3, the mixed powder of the above-mentioned preparation method with the oxy-acetylene flame powder spraying is sprayed on the workpiece surface, the gained coat-thickness is 0.4mm, and the gained appearance color is the powder of white, and the X-ray diffraction result shows that powder is an aluminum oxide.
Claims (4)
1, a kind of method of utilizing reactive spray to prepare aluminium oxide ceramic coating layer is characterized in that: adopt the diaspore powder as spray material, utilize the method for flame powder spraying, prepare aluminium oxide ceramic coating layer at metal and alloy surface thereof.
According to the method for claim 1, it is characterized in that 2, said diaspore powder is to adopt diaspore ore to make powder through crushing screening, clean with acid solution again and remove impurity, and in stove, dry and make.
3, according to the method for claim 1, it is characterized in that, said spray material is to be in addition one or more mixed powders for batching in titanium dioxide, cerium dioxide, the aluminum phosphate of main component with the diaspore, and the composition range of wherein said mixed powder is: to prepare 1000 gram mixed powders is example
Titanium dioxide TiO
2The 0-150 gram
Cerium dioxide CeO
2The 0-20 gram
Aluminum phosphate AlPO
4The 0-30 gram
Diaspore β-AlOOH supplies surplus.
4, according to claim l, 2 or 3 method, it is characterized in that, specifically may further comprise the steps:
1) the metal or alloy workpiece surface to required spraying carries out shot peening;
2) method with the flame powder spraying sprays one deck nickel alclad bottom at the workpiece surface after shot peening, and thickness is less than 0.1mm;
3) method of said spray material with the flame powder spraying is sprayed on the workpiece surface, thickness is less than 0.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00100504A CN1131337C (en) | 2000-01-20 | 2000-01-20 | Process for preparing coated alimina-base layer of ceramics by reactive spray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00100504A CN1131337C (en) | 2000-01-20 | 2000-01-20 | Process for preparing coated alimina-base layer of ceramics by reactive spray |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1306097A true CN1306097A (en) | 2001-08-01 |
| CN1131337C CN1131337C (en) | 2003-12-17 |
Family
ID=4575491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00100504A Expired - Fee Related CN1131337C (en) | 2000-01-20 | 2000-01-20 | Process for preparing coated alimina-base layer of ceramics by reactive spray |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1131337C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015042982A1 (en) * | 2013-09-30 | 2015-04-02 | Hewlett-Packard Development Company,L.P. | Coatings of metal surfaces |
| US20180119323A1 (en) * | 2015-05-08 | 2018-05-03 | Thies Gmbh & Co. Kg | Method for the treatment of a textile substrate, and devices for carrying out said method |
-
2000
- 2000-01-20 CN CN00100504A patent/CN1131337C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015042982A1 (en) * | 2013-09-30 | 2015-04-02 | Hewlett-Packard Development Company,L.P. | Coatings of metal surfaces |
| US20180119323A1 (en) * | 2015-05-08 | 2018-05-03 | Thies Gmbh & Co. Kg | Method for the treatment of a textile substrate, and devices for carrying out said method |
| US10895031B2 (en) * | 2015-05-08 | 2021-01-19 | Thies Gmbh & Co. Kg | Method for the treatment of a textile substrate, and devices for carrying out said method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1131337C (en) | 2003-12-17 |
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