二硅化钼对镍铝涂层显微组织和性能的影响
Effect of Molybdenum Disilicide on Microstructure and Properties of Nickel-Aluminum Coating
摘 要
在镍包铝粉体中添加MoSi2, 采用等离子喷涂方法制备了镍铝涂层, 研究了MoSi2对镍铝涂层的组织、显微硬度和摩擦磨损性能的影响, 并分析了涂层的磨损机理。结果表明: 加入MoSi2后, 镍铝涂层主要由Ni3Al、NiAl、MoSi2和Mo5Si3相组成; 随着MoSi2含量的增加, 涂层中孔隙、微裂纹的数量及尺寸增加, 显微硬度也逐渐增大; 加入质量分数为20%的MoSi2后涂层的耐磨性最好; 纯镍铝涂层的磨损机理为磨粒造成的犁削, 加入20%MoSi2后涂层的磨损机理为碾压作用和少量的脆性断裂, 加入50%MoSi2后涂层主要为脆性断裂。
二硅化钼
显微组织
性能
nickel-aluminum coating
molybdenum dislicide
microstructure
property
Abstract
MoSi2 was added to nickel-aluminum powders to prepare nickel-aluminum coatings by using plasma spraying, the effect of MoSi2 on microstructure, microhardness and friction and wear property of nickel-aluminum coatings was studied, and the wear mechanism of the coating was analyzed. The results show that the nickel-aluminum coating mainly composed of Ni3Al, NiAl, MoSi2 and Mo5Si3 phases after adding MoSi2, the number and size of porosity and the microcracks in the coating and the microhardness of coating increased with the increase of the content of MoSi2. The wear resistance of the coating with 20wt% MoSi2 was the best. The wear mechanism of pure nickel-aluminum coating was ploughing caused by abrasive particles, the wear mechanism of the coating with 20wt% MoSi2 was mainly pressing and a small number brittle fracture, and the wear mechanism of the coating with 50wt% MoSi2 was brittle fracture.
中图分类号 TG115.5
所属栏目 材料性能及其应用
基金项目 湖南省自然科学基金资助项目(11JJ3063); 湖南省教育厅资助项目(11B047, 11C0513); 湖南省科技厅计划资助项目(2010GK3144)
收稿日期 2011/7/14
修改稿日期 2012/1/3
网络出版日期
作者单位点击查看
备注颜建辉(1973-), 男, 江西莲花人, 副教授, 博士。
引用该论文: YAN Jian-hui,MA Su-juan,TANG Si-wen,WU Hai-jiang,HUANG Luo. Effect of Molybdenum Disilicide on Microstructure and Properties of Nickel-Aluminum Coating[J]. Materials for mechancial engineering, 2012, 36(7): 56～59
颜建辉,马素娟,唐思文,吴海江,黄洛. 二硅化钼对镍铝涂层显微组织和性能的影响[J]. 机械工程材料, 2012, 36(7): 56～59
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参考文献
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【2】COURTRIGHT E L. A comparison of MoSi2 matrix composites with other silicon-base composite systems [J].Material Science and Engineering A, 1999, 261(1/2):53-63.
【3】HAWK J A, ALMAN D E. A comparative study of the abrasive wear behavior of MoSi2[J].Scripta Metallurgica et Materialia, 1995, 32(5):725-730.
【4】张厚安, 古思勇, 严迪科, 等.MoSi2高温磨损行为的配副特性研究[J].摩擦学学报, 2010, 30(2):174-178.
【5】张厚安, 唐思文, 时存, 等.温度对MoSi2/Si3N4高温摩擦磨损行为的影响[J].中国机械工程, 2009, 20(21):2624-2627.
【6】胡小平, 颜建辉, 黄之初, 等. 1100℃下MoSi2涂层的高温摩擦磨损性能研究[J].中国机械工程, 2010, 21(19):2364-2368.
【7】颜建辉, 唐思文, 张厚安.二硅化钼喷涂粉末的制备及其涂层组织结构[J]. 无机材料学报, 2011, 26(2):203-208.
【8】DOAN C P, HAWK J A.Role of composition and microstructure in the abrasive wear of high-alumina ceramics[J]. Wear, 1999, 225/229(2):1050-1058.
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