等离子喷涂纳米复合Ag/SnO_2电触头材料放电性能研究  

Electrical Property of Nanocomposite Ag/SnO_2 Electrical Contact Material Prepared by Plasma Spraying

作　　者：姜凤阳[1,2] 王俊勃[1] 付翀[1] 杨敏鸽[1] 贺辛亥[1] 苏晓磊[1] 丁秉钧[3] 刘江南[1,2] 

机构地区：[1]西安工程大学,陕西西安710048 [2]西北工业大学,陕西西安710072 [3]西安交通大学,陕西西安710049

出　　处：《稀有金属材料与工程》2012年第8期1443-1446,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50834003);西安市产学促进工程工业应用技术研发项目(CXY08001);陕西省教育厅专项科研计划项目(09JK446;11JK0808)

摘　　要：采用化学共沉淀法和高能球磨法制备纳米Ag-12%SnO2混合粉末,用等离子喷涂法将混合粉喷涂在Cu基表面,制备纳米复合Ag/SnO2涂层。测试涂层的物理性能和真空条件下的电性能,利用SEM观察分析放电后的表面组织结构。结果表明,纳米复合Ag/SnO2涂层越厚,密度越小,电阻率越大,而硬度与SnO2分布状况有关;涂层表面平整度影响耐电压强度值的分布;纳米复合Ag/SnO2涂层的分散电弧性能好,电弧烧蚀速率小。Nanocomposite Ag/SnO2 coating was prepared on pure Cu-surface by plasma spraying using the Ag-12%SnO2 mixed powder fabricated by chemical coprecipitation and high-energy ball milling.The physical property and electrical property were tested in vacuum the surface structure was observed and analyzed by SEM.The results show that the thicker nanocomposite Ag/SnO2 coating is,the smaller density is,the larger resistivity is,the higher the breakdown strength is.The hardness is related to the distribution of SnO2.The distribution of breakdown strength values is connected with coating surface roughness.The arc of nanocomposite Ag/SnO2 coating is dispersive and the arc erosion rate is low.

关 键 词：等离子喷涂 纳米复合Ag/SnO2 耐电压强度 电弧侵蚀 

分 类 号：TG174.44[金属学及工艺—金属表面处理]