Yang Rui, Liu Shaohong, Cui Hao, Yang Hongwei, Zeng Yiming, Liu Manmen, Chen Jialin, Wen Ming, Wang Wei, Luo Zhengtang, Sun Xudong
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming 650106, China.
Materials (Basel). 2022 Mar 26;15(7):2450. doi: 10.3390/ma15072450.
Ag/YO has excellent potential to replace Ag/CdO as the environmentally friendly electrical contact material. Using spherical YO as the starting material, Ag/YO contacts with a quasi-continuous network structure were successfully fabricated by a low-energy ball milling treatment. The mean size of YO used ranged from 243 to 980 nm. Due to the differences in the size of YO, Ag/YO contacts had different primitive microstructures, thereby exhibiting distinctive anti-arc-erosion capabilities. Ag/YO contact prepared using 243 nm YO showed the best anti-arc-erosion capability and the most outstanding electrical performance measures, such as low contact resistance, less mass transfer, and no failure up to 10 cycle times. The quasi-continuous network structure formed in the micro-scale was responsible for the excellent electrical performance. The short distance between YO particles in the network promoted the cathode arc motion, and thus alleviated the localized erosion. The results obtained herein may inspire further attempts to design electrical contacts rationally.
Ag/YO作为环境友好型电接触材料具有取代Ag/CdO的巨大潜力。以球形YO为原料，通过低能球磨处理成功制备了具有准连续网络结构的Ag/YO触头。所用YO的平均尺寸在243至980纳米之间。由于YO尺寸不同，Ag/YO触头具有不同的原始微观结构，从而表现出独特的抗电弧侵蚀能力。使用243纳米YO制备的Ag/YO触头表现出最佳的抗电弧侵蚀能力和最出色的电气性能指标，如低接触电阻、较少的质量转移以及在10个循环周期内无失效现象。微观尺度上形成的准连续网络结构造就了优异的电气性能。网络中YO颗粒之间的短距离促进了阴极电弧运动，从而减轻了局部侵蚀。本文所得结果可能会激发人们进一步尝试合理设计电接触材料。
