反应合成银氧化锡电接触材料抗熔蚀性研究  

INVESTIGATION IN EROSION RESISTANCE OF SILVER TIN OXIDE ELECTRICAL CONTACT MATERIALS FABRICATED BY REACTIVE SYNTHESIS

作　　者：陈敬超[1] 孙加林[2] 杜焰[1] 周晓龙[1] 甘国友[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院云南省新材料制备与加工重点实验室,昆明650093 [2]昆明贵金属研究所,昆明650221

出　　处：《理化检验（物理分册）》2003年第8期387-391,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家科技攻关 ( 2 0 0 1BA3 2 6C);云南省科技攻关( 2 0 0 0B 0 3 )联合资助

摘　　要：采用反应合成技术和传统粉末冶金技术制备银氧化锡 (AgSnO2 )电接触材料 ,利用千瓦级CO2 激光器模仿电弧作用在试样表面产生局部熔化。对AgSnO2 块体材料进行抗熔蚀性测试 ,对块体材料及冷拉拔的AgSnO2 线材进行显微组织分析 (扫描电镜、透射电镜 )。研究结果表明 ,采用反应合成技术可以在银基体中合成尺寸细小、界面新鲜的SnO2 颗粒 ,制备AgSnO2 电接触材料 ;用反应合成法制备的AgSnO2 材料中 ,微米级的SnO2 颗粒系由纳米级的SnO2 颗粒聚集而成 ;用反应合成法制备的AgSnO2 电接触材料由于改变了银和SnO2 的结合状态使材料的抗熔蚀性得到改善和提高。Silver tin oxide (AgSnO 2) were fabricated both in conventional powder metallurgy (PM) and reactive synthesis (RS) method. The local melt on AgSnO 2 sintered body surface was carried out by CO 2 Laser to simulate the current arc. The erosion resistance analysis was done to bulk AgSnO 2, and the microstructure of bulk AgSnO 2 and cold drawn wire were determined through scanning electron microscope (SEM) and transmission electron microscope (TEM). The results shown that SnO 2 particles with finer size, fresh interface can be formed in silver matrix, and then the AgSnO 2 electrical contact materials can be fabricated by reactive synthesis. The tin oxide particles in micrometer dimension were assembled from nanometer particles in RS process. For the reason that the combination status of silver and tin oxide had been changed, the erosion resistance was enhanced in AgSnO 2 electrical contact materials fabricated by RS process.

关 键 词：银氧化锡 电接触材料 抗熔蚀性 粉末冶金 反应合成技术 显微组织 显微组织分析 

分 类 号：TB34[一般工业技术—材料科学与工程]