CN101280405B - Lanthanum oxide-aluminum oxide composite coating prepared by plasma spraying method - Google Patents
Lanthanum oxide-aluminum oxide composite coating prepared by plasma spraying method Download PDFInfo
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- CN101280405B CN101280405B CN2008100368874A CN200810036887A CN101280405B CN 101280405 B CN101280405 B CN 101280405B CN 2008100368874 A CN2008100368874 A CN 2008100368874A CN 200810036887 A CN200810036887 A CN 200810036887A CN 101280405 B CN101280405 B CN 101280405B
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Abstract
The present invention relates to a lanthanum oxide and aluminum oxide composite coating layer which are prepared by adopting a plasma spraying method and the preparation method thereof, which belongs to the abrasion proof ceramic coating layer field. Aluminum oxide power and lanthanum oxide power are weighed as per the 3/97 to 10/90 proportion of lanthanum oxide and aluminum oxide and then are mixed by ball milling; composite power is deposited on the cleaned and blasted metal basis material by adopting the plasma spraying process. The microstructure analysis of the lanthanum oxide and aluminum oxide composite coating layer prepared by the invention shows that the lanthanum element is uniformly dispersed on the basal body of the aluminum oxide, compared with the spraying pure Al2O3 coating layer, a plasma spraying Al2O3-La2O3 coating layer has higher deposition efficiency, and the wear resistant of the plasma spraying coating layer is effectively improved.
Description
Technical field
The present invention relates to lanthanum trioxide-aluminum oxide compound coating of plasma spraying method preparation and preparation method thereof, belong to the abrasion-proof ceramic coat field.
Background technology
The plasma spraying aluminum oxide coating layer has acquired better application as a kind of good wear-resistant coating in fields such as machinery, chemical industry, papermaking.But on the one hand, the inherent fragility of stupalith and the process characteristic of hot-spraying techniques have determined the low deposition efficient and the porous constitutional features of aluminum oxide coating layer to have restricted the further application of coating in wear-resisting field to a great extent; On the other hand, along with high-speed development of science and technology, the applied environment of coated material is had higher requirement again.Therefore, how improving plasma spraying aluminum oxide coating layer structure and wear resisting property is the problem that is worth research.
The approach that domestic and foreign literature report is used to improve plasma spraying aluminium oxide structure and mechanical property mainly contains: process parameter optimizing, powder structure and composition design, aftertreatment etc.Because the plasma spraying Effect Factors for Sythetic Technology reaches more than 50 and influences each other again, makes that the test work amount is big and is difficult to obtain optimize technology.Though adopt aftertreatment means such as dipping sealing, laser remolten can reduce void content effectively, improve coating density and calorifics, mechanical property (M.Vippola, S.Ahmaniemi, J.Keranen, et al., Mater.Sci.Eng.A, 2002,32:1-8), but make that also preparation technology of coating is complicated simultaneously, the coating preparation cost improves.The plasma spraying coating general process is fusion powder high-speed impact base material, sprawls, cools off, solidifies and pile up the formation coating, sprays the structure of powder and structure and the performance that component characteristic directly has influence on melt granules flight characteristics and deposited coatings as can be seen.Therefore, the composition and the structure design of spraying powder have become the important means that improves the plasma sprayed aluminum coating wear resistance.As preparing Al by alloyage
2O
3-TiO
2, Al
2O
3-Cr
2O
3Composite powder, plasma spraying prepared coating, its wear resisting property is with respect to pure Al
2O
3Coating all have some improvement (V.Fervel, B.Normand, C.Coddet, Wear, 1999,230:70-77).In recent years, investigators are still constantly exploring new compound coating system.
Summary of the invention
The present invention is on the basis of conventional art, adopts mechanically mixing prepared Al
2O
3-La
2O
3Composite powder utilizes atmospheric plasma spraying technology on metal base, depositing Al
2O
3-La
2O
3Compound coating.
Specific embodiment of the present invention is as follows:
(1) be 3/97～10/90 to take by weighing aluminum oxide and lanthanum trioxide powder by lanthanum trioxide and alumina ration, ball milling mixes;
(2) using plasma spraying coating process, the composite granule that step (1) is made are deposited on the metal base that cleans with sandblasting.
Preferred abrading-ball is 1/3～1/2 with the powder quality ratio.
The process parameters range of preferred control is:
600～700 amperes in electric current
Plasma gas H
27～20 standard liter/min
Plasma gas Ar 40～55 standard liter/min
Powder carrier gas Ar 3.5～4.2 standard liter/min
Spray distance 80～120mm
Preferred metal base is a stainless steel substrate.
The lanthanum trioxide that the present invention makes-aluminum oxide compound coating microstructure analysis show lanthanum element be evenly dispersed in alumina substrate mutually in (Fig. 3), XRD figure spectrum shows that the coating crystalline phase consists of: γ-Al
2O
3, α-Al
2O
3, La
2O
3, La (OH)
3(Fig. 4).
Than the pure Al of spraying
2O
3Coating, plasma spraying Al
2O
3-La
2O
3Coating has higher sedimentation effect (Fig. 5), improves the wear resisting property (Fig. 6) of plasma spraying coating effectively.
Description of drawings
Fig. 1 is Al
2O
3-5wt.%La
2O
3The surface topography of composite powder: La as can be seen
2O
3Powder disperses preferably.
Fig. 2 is different content lanthanum oxide doping Al
2O
3-La
2O
3Composite powder X ray diffracting spectrum: because Al
2O
3-La
2O
3Easy water-absorbent in air, the XRD figure spectrum has La (OH)
3The peak.
Fig. 3 is Al
2O
3-5wt.%La
2O
3The cross section pattern and the composition analysis of compound coating: composition analysis demonstration earth La is disperseed more uniformly in coating inside.
Fig. 4 is different content lanthanum oxide doping Al
2O
3-La
2O
3The X ray diffracting spectrum of compound coating: the coating principal crystalline phase is γ-Al
2O
3, be attended by a certain amount of α-Al
2O
3, La
2O
3, La (OH)
3Phase.
Fig. 5 is lanthanum oxide doping article on plasma body spraying Al
2O
3The influence of coating sedimentation effect: as can be seen, La
2O
3Interpolation improved Al
2O
3The sedimentation effect of coating.
Fig. 6 and Fig. 7 lanthanum oxide doping article on plasma body spraying Al
2O
3The influence of coating wear resistance: as can be seen, La
2O
3Interpolation reduced wear rate, improved Al effectively
2O
3The abrasion property energy.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited only to the present invention.
By lanthanum trioxide quality percentage composition is 3% to take by weighing aluminum oxide and lanthanum oxide powder, be 1/3 to take by weighing the zirconia ball that diameter is 3mm by ball powder ratio again, pack into together in the ball milling bottle, on ball mill, do and mixed 2 hours, make lanthanum trioxide quality percentage composition and be 3%, 5% and 10% Al
2O
3-La
2O
3Composite powder.Adopt atmospheric plasma spraying technology, press table 1 control process parameters, be of a size of stainless steel friction disc surface spraying compound coating and the pure alumina coating of Φ 50 * Φ 6.5 * 8mm through cleaning and sandblast pretreatment.As seen from Figure 5, under the same processing condition, the relative pure alumina coating of the thickness of the compound coating after lanthanum trioxide is rear-earth-doped has 20～35% raising, and the raising of deposited coatings thickness reflects that the interpolation of rare earth lanthanum oxide has improved the sedimentation effect of aluminum oxide coating layer greatly.
By lanthanum trioxide quality percentage composition is 5% to take by weighing aluminum oxide and lanthanum oxide powder, be 1/3 to take by weighing the zirconia ball that diameter is 3mm by ball powder ratio again, pack into together in the ball milling bottle, on ball mill, do and mixed 2 hours, make lanthanum trioxide quality percentage composition and be 3%, 5% and 10% Al
2O
3-La
2O
3Composite powder.Adopt atmospheric plasma spraying technology, press table 1 control process parameters, be of a size of stainless steel friction disc surface spraying compound coating and the pure alumina coating of Φ 50 * Φ 6.5 * 8mm through cleaning and sandblast pretreatment.As seen from Figure 5, under the same processing condition, the relative pure alumina coating of the thickness of the compound coating after lanthanum trioxide is rear-earth-doped has 20～35% raising, and the raising of deposited coatings thickness reflects that the interpolation of rare earth lanthanum oxide has improved the sedimentation effect of aluminum oxide coating layer greatly.
By lanthanum trioxide quality percentage composition is 10%
Taking by weighing aluminum oxide and lanthanum oxide powder, is 1/3 to take by weighing the zirconia ball that diameter is 3mm by ball powder ratio again, in the ball milling bottle of packing into together, does on ball mill and mixes 2 hours, makes lanthanum trioxide quality percentage composition and be 3%, 5% and 10% Al
2O
3-La
2O
3Composite powder.Adopt atmospheric plasma spraying technology, press table 1 control process parameters, be of a size of stainless steel friction disc surface spraying compound coating and the pure alumina coating of Φ 50 * Φ 6.5 * 8mm through cleaning and sandblast pretreatment.As seen from Figure 5, under the same processing condition, the relative pure alumina coating of the thickness of the compound coating after lanthanum trioxide is rear-earth-doped has 20～35% raising, and the raising of deposited coatings thickness reflects that the interpolation of rare earth lanthanum oxide has improved the sedimentation effect of aluminum oxide coating layer greatly.
Adopt the prepared cated friction disc of spraying of embodiment 1,2,3, through (about surfaceness 0.5 μ m) after certain grinding and polishing light technology, with Φ 9.5mm Stainless Steel Ball with ball-dish (Ball-on-disc) way of contact to grinding.Friction device is the UMT-3 multifunction friction wear tester of U.S. CE TR.The frictional experiment condition is: load 15N, and rotating speed and friction radius are respectively 1000rpm and 15mm (the about 1.7m/s of linear velocity), and fraction time is 10min.The frictional wear result contrasts as can be seen the rear-earth-doped abrasion property energy that improved effectively from frictional coefficient and wear rate as shown in Figure 5.
Table 1
| Electric current | 660 amperes |
| |
12 standard liter/min |
| Plasma gas Ar | 49 standard liter/min |
| Powder carrier gas Ar | 4.0 standard liter/min |
| Spray distance | 110mm |
Claims (4)
1. plasma spraying method prepares the method for lanthanum trioxide-aluminum oxide compound coating, it is characterized in that comprising the steps:
(1) be 3/97～10/90 to take by weighing aluminum oxide and lanthanum trioxide powder by lanthanum trioxide and alumina ration, ball milling mixes;
(2) using plasma spraying coating process, the composite granule that step (1) is made are deposited on the metal base that cleans with sandblasting,
The parameter of plasma spraying technology is:
。
2. the method for preparing lanthanum trioxide-aluminum oxide compound coating by the described plasma spraying method of claim 1 is characterized in that described metal base is a stainless steel substrate.
3. the method for preparing lanthanum trioxide-aluminum oxide compound coating by the described plasma spraying method of claim 1 is characterized in that described abrading-ball and powder quality ratio are 1/3～1/2.
4. lanthanum trioxide-aluminum oxide the compound coating for preparing the method preparation of lanthanum trioxide-aluminum oxide compound coating by claim 1 or 2 or 3 described plasma spraying methods.
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| CN102553596B (en) * | 2010-12-10 | 2013-07-31 | 中国石油天然气股份有限公司 | Method for preparing catalyst coating on metal substrate |
| CN102296264B (en) * | 2011-06-30 | 2012-12-26 | 燕山大学 | Thermal spraying ceramic soft wire |
| CN102398126A (en) * | 2011-11-16 | 2012-04-04 | 燕山大学 | Alumina ceramic thermal spraying flux-cored wire |
| CN102491639A (en) * | 2011-12-01 | 2012-06-13 | 安徽禹恒材料技术有限公司 | Nanometer aluminum oxide composite ceramic coating layer and preparation method thereof |
| CN102409280A (en) * | 2011-12-01 | 2012-04-11 | 安徽禹恒材料技术有限公司 | Aluminum oxide ceramic coating with nano crystal structure and preparation method thereof |
| CN103194715B (en) * | 2012-01-05 | 2015-07-01 | 中国科学院微电子研究所 | Preparation of amorphous Y by atmospheric plasma spraying technology3Al5O12Method for coating |
| CN105239356A (en) * | 2015-09-05 | 2016-01-13 | 苏州宏久航空防热材料科技有限公司 | Composite ceramic coating for surface of SiC fiber and preparation method thereof |
| CN105648386B (en) * | 2016-02-18 | 2018-12-07 | 中国科学院上海硅酸盐研究所 | Thermal spraying aluminium oxide-yttrium oxide composite ceramic coat and preparation method thereof |
| CN108968701B (en) * | 2017-06-01 | 2022-04-05 | 佛山市顺德区美的电热电器制造有限公司 | Non-stick coating, preparation method thereof, pot and cooking equipment |
| CN115305433B (en) * | 2022-07-25 | 2024-01-09 | 广东羚光新材料股份有限公司 | Nickel screen and preparation method and application thereof |
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