低温烧结纳米掺杂Ag-SnO_2电接触合金放电性能研究  

Study on discharging performance of doping nanocomposite Ag-SnO_2 contacts at low temperature sintering

作　　者：王俊勃[1,2] 刘松涛[1] 杨敏鸽[1] 贺辛亥[1] 付翀[1] 丁秉钧[2] 

机构地区：[1]西安工程大学,西安710048 [2]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《功能材料》2014年第24期24064-24069,共6页Journal of Functional Materials

基　　金：国家自然科学基金重点资助项目(50834003);西安市工业应用技术研发资助项目(CXY08001.4);陕西省教育厅科学研究计划自然科学专项资助项目(14JK1314)

摘　　要：利用化学共沉淀、高能球磨技术及热压烧结等方法制备出Fe掺杂纳米复合Ag-SnO2电接触合金,测定了纳米复合电接触合金密度、硬度、电阻率、耐电压强度、耐烧蚀性等基本物理性能,运用扫描电镜(SEM)对电性能测试前后组织进行观察分析。结果发现,Fe元素的加入,细化了纳米SnO2;Fe掺杂含量越多,纳米氧化物粒度越小,纳米复合电接触合金组织也越细小均匀,纳米复合电接触材料硬度、电阻率、平均耐电压强度和电弧寿命上升,截流值降低;且Fe掺杂对纳米复合电接触合金电弧烧蚀速率有明显影响。The Fe-doped nanocomposite Ag-SnO2 contact alloys were prepared by chemical co-precipitation method,high-energy ball milling,hot pressing and sintering technique.The density,hardness,resistivity, brakdown strength and electrical arc erosion of alloys were measured,and the microstructures of the nanocom-posite contact alloys were analyzed by field emission scanning electron microscopy (FESEM).Results show that the nanosized of SnO2 particles were refined doped with Fe,when Fe concentration increases,the size of oxide particles in nanocomposite Ag-SnO2 contact decreases further,and the microstructures of alloys are more ho-mogenous and fine.Meanwhile the hardness,resistivity,average filed strength and arcing life of nanocomposite Ag-SnO2 contact increase,but its the current chopping value decrease.While the Fe-doping concentration has obviously influence on the arc ablation rate of nanocomposite electrical contact alloys.

关 键 词：化学共沉淀 FE掺杂 纳米SNO2 Ag基电接触材料 放电性能 

分 类 号：TM201[一般工业技术—材料科学与工程] TG146.3[电气工程—电工理论与新技术]