烧结制备Ag-Al电接触材料的组织和性能研究  

Study on the microstructure and properties of sintered Ag-Al electrical contact materials

作　　者：朱海澄 刘绍宏 周利民[2] 闻明[2] 刘满门[2] 崔浩[2] 陈家林[2] 刘捷 ZHU Hai-cheng;LIU Shao-hong;ZHOU Li-min;WEN Ming;LIU Man-men;CUI Hao;CHEN Jia-lin;LIU Jie(Northeastern University,School of Materials Science and Engineering,Shenyang 110819,China;Kunming Institute of Precious Metals,Kunming 650106,China;Kunming Metallurgy College,Kunming 650033)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819 [2]昆明贵金属研究所,昆明650106 [3]昆明冶金高等专科学校,昆明650033

出　　处：《贵金属》2021年第2期1-8,14,共9页Precious Metals

基　　金：国家自然科学基金项目(51977027,51967008);云南省重大科技专项计划项目(2018ZE001);教育部基本科研业务费项目(N2002007);昆明贵研新材料科技有限公司R&D基金(2020040604)。

摘　　要：分别用粉末冶金无压烧结和热压烧结技术制备了Ag-Al电接触材料,并通过场发射扫描电镜(FE-SEM)分析了其显微组织及成分分布,探讨了两种制备工艺及含铝量对Ag-Al电接触材料密度、硬度、电导率和耐压强度的影响。结果表明,热压烧结样品力学、电学性能均优于无压烧结样品,且热压样品随着含铝量增加,硬度、耐压强度升高,电导率下降;耐压强度主要受含铝量影响;烧结方式影响Ag-Al电接触材料显微组织,进而影响电弧侵蚀后Ag-Al电接触材料表面形貌和成分分布。Ag-Al electrical contact materials were prepared by pressureless sintering and hot-pressing sintering methods.Their microstructure and element distributions were studied by field emission scanning electron microscope(FE-SEM).The influence of sintering methods and Al contents on density,hardness,conductivity,and breakdown strength was investigated.The results showed that hot-pressing sintered samples exhibited better electrical and mechanical properties than pressureless sintering samples.The hardness and compressive strength of the hot-pressed sample increased with aluminum content,while its electrical conductivity decreased.The breakdown strength was mainly affected by Al contents.Sintering methods influenced the microstructure,surface morphology and composition distribution of Ag-Al electrical contact materialsafter arc erosion.

关 键 词：电接触材料 Ag-Al 烧结 电学性能 力学性能 

分 类 号：TG146.3[一般工业技术—材料科学与工程]