Effect of 伪-Al₂O₃ coatings on the interface of Ni/SiC composites prepared by electrodeposition

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• 作者：Zhong Wu ; Bin Shen ; Lei Liu ; ^{anodic@sjtu.edu.cn}
• 关键词：伪-Al2O3 coating ; Sol&ndash ; gel ; Interface ; Ni/SiC composite ; Electrodeposition
• 刊名：Surface and Coatings Technology
• 出版年：2012
• 期刊代码：106_02578972
• 类别：ms
• 出版时间：15 March, 2012
• 卷：206
• 期：14
• 页码：3173-3178
• 文件大小：1991 K

摘要

This paper describes an investigation on the effect of 伪-Al₂O₃ coating on the interface between nickel and SiC particle. Uniform, dense and well-adhered 伪-Al₂O₃ coatings were obtained on the surface of SiC particles by sol-gel technology. The nickel-based composites reinforced with 伪-Al₂O₃-coated SiC particles (CS_p) or uncoated SiC particles (UCS_p) prepared by composite electrodeposition were heated at 600 掳C to study the reactivity and the resulting interfaces. The results showed that the Ni/CS_p composites presented excellent thermal stability without interfacial reaction, while nickel silicide formed in the Ni/UCS_p composites. It indicated that high-temperature interfacial reaction between SiC particles and nickel matrix was efficiently inhibited by the 伪-Al₂O₃ coatings. Moreover, great differences of the local mechanical properties of interfaces were observed by the nanoindentation characterization.