AgSnO_2电接触材料熔桥行为的高速摄像研究（英文）  

High Speed Imaging Observation on Molten Bridge of AgSnO_2 Electrical Contact Material

作　　者：陈静洪[1] 陈松[1] 李幕阳 谢明[1] 任县利 

机构地区：[1]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,云南昆明650106

出　　处：《稀有金属材料与工程》2017年第12期3613-3620,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51267007,51461023,51164015,U1302272);Innovation Team of Yunnan Province(2012HC027);Natural Science Foundation of Yunnan Province(2010CD126,2012FB195,2015FA042)

摘　　要：以AgSnO_2电接触材料为研究对象,借助高速摄像技术并与电接触试验机组成电接触-高速摄像试验体系,观测触头熔桥行为的基本特征和规律,并进行定量测量,同时通过扫描电镜(SEM)和能谱(EDS)分析对熔桥行为后触头表面的微观结构和元素分布进行分析。结果表明,AgSnO_2触头熔桥演化行为可分为接触区域熔化、熔桥稳定存在和熔桥失稳及断开3个阶段,熔桥和电弧现象可以同时存在,并且存在一定的协同和竞争关系,AgSnO_2触头材料的熔桥尺寸为微米级,熔桥直径随电流的增大而增大,熔桥长度随电流的增大而减小。熔桥演化行为过程中熔桥形状依次表现为墩粗型、圆柱型和哑铃型,熔桥行为会改变触头的表面形貌和元素分布。An electrical contact-high speed imaging experimental system was developed to study the basic characteristics and laws of molten bridges of AgSnO2 electrical contact material.On the one hand,the quantitative measurements were investigated by high speed imaging technology.On the other hand,the microstructure and element distribution on the surface of contacts were analyzed by SEM and EDS after molten bridges behavior.Results indicate that the evolution behavior of molten bridges of AgSnO2 contacts can be divided into three regimes：the initial melting period,a stable period and an unstable period during which it eventually ruptures.Molten bridges and arc can exist simultaneously in which there is some cooperation and competition relationship.The dimension of molten bridges of AgSnO2 contact material is micron scale,the diameter of molten bridges increases with the increase of current and the length decreases with the increase of current.In the process of the evolution behavior of molten bridges,the feature of molten bridges can be divided into three types：the pier,follow by the cylindrical and the dumbbell.The morphology and element distribution of the contacts surface are changed by the behavior of molten bridges.

关 键 词：熔桥 高速摄像 电弧 AgSnO2电接触材料 

分 类 号：TG146.32[一般工业技术—材料科学与工程]