文章摘要
热等静压制备AgZnO电触头材料的组织和性能研究
Microstructure and Property Research on AgZnO Electrical Contact Materials Prepared by Hot Isostatic Pressing (HIP)
投稿时间:2018-08-31  
DOI:
中文关键词: 电接触材料  AgZnO  热等静压  电弧侵蚀
英文关键词: electric contact material  AgZnO  HIP  arc erosion
基金项目:国家重点研发计划(2017YFB0305700);云南省青年基金(2018FD142);国家自然科学基金(NSFC-云南联合基金)(U1602275、U1602271);云南省重大科技专项(2018ZE011、2018ZE012、2018ZE022、2018ZE026);云南省面上项目(2018FB088、2017FB144、2018FB094)。
作者单位E-mail
李爱坤 昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室昆明 650106 lak@ipm.com.cn 
聂宝鑫 贵研中希上海新材料科技有限公司上海 201600 niebaoxin@longsun.cc 
谢明 昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室昆明 650106  
王松 昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室昆明 650106  
陈赟 昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室昆明 650106  
朱云飞 贵研中希上海新材料科技有限公司上海 201600  
陈永泰 昆明贵金属研究所 稀贵金属综合利用新技术国家重点实验室昆明 650106  
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中文摘要:
      利用热等静压技术,采用混粉法制备高含量ZnO的AgZnO(12)电接触材料,研究了材料的显微组织,测试了电接触性能。利用扫面电镜(SEM)、金相显微镜(OA)表征了材料的微观形貌和电弧作用后的触点表面形貌。结果表明,热等静压技术能够有效的提高AgZnO(12)的烧结坯致密度;热等静压制备的AgZnO(12)丝材软态抗拉强度达到292 MPa,延伸率达到16%,比同状态下常规烧结的丝材分别提升了5.4%和28%,显微硬度值为80.3,没有明显的变化;AgZnO(12)加工硬化率高,随加工变形延伸率急剧下降;在直流阻性负载下的电弧作用后阳极形貌平整,材料侵蚀以喷溅为主,阴极形貌有富银的凝固凸点,周边形成金属凝固铺层;材料转移为阳极往阴极转移,接触电阻低而稳定,有很好的应用前景。
英文摘要:
      AgZnO(12) electrical contact materials with high content of ZnO were prepared by mixing powder method by using HIP technology. Surface scanning electron microscopy (SEM) and metallographic microscope (OA) were used to characterize the micro morphology of the materials and the surface morphology of contacts after arc erosion. The results show that the heat isostatic pressure technology can effectively improve AgZnO(12) sintering density. The tensile strength of AgZnO(12) filaments prepared by hot isostatic pressure reached 292MPa and the elongation reached 16%. Compared with conventional sintered filaments in the same state, AgZnO(12) was increased by 5.4% and 28%, and the microhardness value was 80.3, without significant changes. AgZnO(12) has a high work hardening rate and decreases sharply with the process deformation elongation. After the arc erosion under the DC resistance load, the anode had a flat appearance, the material erosion was dominated by spillage, the cathode had Ag solidification protrusion, and metal solidification layer was formed around it. The material is transferred from anode to cathode, and the contact resistance is low and stable. AgZnO(12) were prepared by HIP has a good application prospect.
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