High-speed imaging observation on molten bridges of AgNi10 electrical contact material  

作　　者：Jing-Hong Chen Song Chen Ming Xie Jie-Qiong Hu Sai-Bei Wang 

机构地区：[1]State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metal,Kunming Institute of Precious Metals,Kunming,650106,China

出　　处：《Rare Metals》2023年第1期336-345,共10页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51461023, 51267007,51164015,U1302272,515070575 and U1602275);the Natural Science Foundation of Yunnan Province (Nos.2010CD126, 2012FB195 and 2015FA042);the Yunnan Applied Basic Research Projects (No.2014FB164);the Innovation Team of Yunnan Province (No.2012HC027);the Technology innovation talents of Yunnan Province (No.2015HB024);the Fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (No.SKL-SPM-201526)。

摘　　要：The electrical contact-high-speed imaging experimental system was developed to investigate the molten bridge phenomena of AgNi10 electrical contact material.The dimension of molten bridges was measured along with the measurement of waveforms in the contact voltage under the load of direct current(DC) 6 V(8-20 A)and breaking speed of 50.0 mm·s^(-1).A part of the observed results was presented as well as surface morphology of the contacts after electrical contact behavior,which shows some interesting and new phenomena.Molten bridges and arc could exist simultaneously.The stable molten bridge looks like cylindrical shape and then becomes needle tip at its rupture,the diameter and length of molten bridges both increase with the increase in current and the growth gradient of the diameter is larger than that of the length.The morphology and elemental distribution of the contact surface are changed by the behavior of electrical contact.

关 键 词：Molten bridge High-speed imaging ARC AgNi10 electrical contact material 

分 类 号：TG146.4[一般工业技术—材料科学与工程]