Micro-Crystalline Coatings of Co-Cr Dispersed with Y2O3 Deposited by Series Electro-Pulse Discharge
来源期刊：JOURNAL OF RARE EARTHS2003年第1期
论文作者：李正伟 王德仁 何业东 高唯 徐强 齐慧滨
Key words：metal meterials; series electro-pulse discharge; micro-crystalline coatings dispersed by rare earth oxide; high-temperature oxidation; rare earths;
Abstract: A new technique-series electro-pulse discharge (SEPD)-was developed as a kind of surface coating process. In this technique, both positive and negative poles of a pulse power were used as the depositing electrodes with the substrate alloy as an induction electrode. Micro-crystalline Co-Cr and Co-Cr dispersed with Y2O3 coatings were deposited on Fe-18Cr-8Ni stainless steel surface by using Co30Cr alloy as the depositing electrodes. Oxidation at 950 ℃ in ambient air shows that these coatings greatly improve the oxidation resistance of the steel. The addition of dispersed Y2O3 nano-particles into the alloy coatings was found to further reduce the scaling rate and enhance the adhesion of oxide scales.
李正伟1，王德仁2，何业东2，高唯1，徐强2，齐慧滨2
(1.Department of Chemical and Material Engineering, The University of Auckland, New Zealand;
2.Beijing Key Laboratory of Corrosion, Erosion and Surface Technology, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:A new technique-series electro-pulse discharge (SEPD)-was developed as a kind of surface coating process. In this technique, both positive and negative poles of a pulse power were used as the depositing electrodes with the substrate alloy as an induction electrode. Micro-crystalline Co-Cr and Co-Cr dispersed with Y2O3 coatings were deposited on Fe-18Cr-8Ni stainless steel surface by using Co30Cr alloy as the depositing electrodes. Oxidation at 950 ℃ in ambient air shows that these coatings greatly improve the oxidation resistance of the steel. The addition of dispersed Y2O3 nano-particles into the alloy coatings was found to further reduce the scaling rate and enhance the adhesion of oxide scales.
Key words:metal meterials; series electro-pulse discharge; micro-crystalline coatings dispersed by rare earth oxide; high-temperature oxidation; rare earths;
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