新型AgZrB_(2)触头材料的制备及电气性能  

Preparation and Electrical Characteristics of Novel AgZrB_(2)Contact Materials

作　　者：邱艳茹 王献辉[1] 梁燕[1] 倪菁艺 刘继拓 李航宇 陈秋羽 Qiu Yanru;Wang Xianhui;Liang Yan;Ni Jingyi;Liu Jituo;Li Hangyu;Chen Qiuyu(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《稀有金属材料与工程》2022年第11期4031-4038,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51971173)。

摘　　要：采用超声、球磨和放电等离子烧结相结合的方法制备了不同ZrB_(2)含量(3%,5%,7%,质量分数)的新型AgZrB_(2)触头材料,并通过电接触试验研究了触头材料的电弧侵蚀和材料转移行为。结果表明,ZrB_(2)含量显著影响AgZrB_(2)触头材料的耐电弧侵蚀性能。Ag-3%ZrB_(2)触头材料具有稳定的闭合/分断燃弧能量和持续时间,表现出较好的耐电弧侵蚀性能。但是,过多的ZrB_(2)会导致更高的闭合燃弧能量和更长的闭合燃弧时间,并且分断燃弧能量和时间会产生较大的波动,电弧侵蚀较为严重,这说明过量的ZrB_(2)不利于提高触头材料的耐电弧侵蚀性能。此外,Ag-3%ZrB_(2)和Ag-5%ZrB_(2)触头材料具有相同的材料转移模式——从阳极向阴极转移,而Ag-7%ZrB_(2)触头材料则呈现出相反的转移模式——从阴极向阳极转移。The novel AgZrB_(2)electrical contact materials with different ZrB_(2)contents were prepared by the combination method of ultrasonication,ball milling,and spark plasma sintering,and the arc erosion and material transfer behavior were investigated by the electrical contact tests.The results show that the ZrB_(2)content significantly affects the arc erosion resistance of AgZrB_(2)electrical contact materials.The Ag-3wt%ZrB_(2)contact material presents the stable make/break-arc energy and duration,indicating the excellent arc erosion resistance.However,the increased ZrB_(2)content results in higher make-arc energy and longer make-arc duration with large fluctuations of break arc energy and duration,leading to the severe arc erosion.This result suggests that the excessive ZrB_(2)is not beneficial to the enhancement of arc erosion resistance.Moreover,it is found that the Ag-3wt%ZrB_(2)and Ag-5wt%ZrB_(2)contact materials have the same material transfer mode from anode to cathode,whereas the Ag-7wt%ZrB_(2)contact material has the opposite transfer mode from cathode to anode.

关 键 词：银基电触头 ZrB_(2) 电弧侵蚀 材料转移 

分 类 号：TB30[一般工业技术—材料科学与工程] TM503.5[电气工程—电器]