第二相氧化物对银基触头材料熔池影响的模拟分析  

Simulation analysis of effect of second metal-oxide phase on molten pool in Ag-based electrical contact

作　　者：徐坚[1] 熊惟皓[1] 傅江华[1] 李震彪[2] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《中国有色金属学报》2008年第7期1323-1329,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50477044)

摘　　要：采用有限体积法计算电弧作用下AgMeO触头材料温度场,深入分析第二相MeO颗粒的密度、比热容、热导率、分解温度和分解焓等物性参数对熔池接触面积的影响,详细说明MeO含量(体积分数)对熔池接触面积和熔焊力的影响,着重讨论电弧输入触头的能量、燃弧时间和燃弧半径对熔池接触面积的影响。结果表明:与第二相MeO的密度、热导率及体积分数等物性参数对熔池接触面积的影响相比,电弧输入能量的影响才是最主要的。Based on the calculation results of the temperature field in AgMeO contact materials after arc by finite volume method（FVM）, the effects of density, heat capacity, thermal conductivity, decomposition temperature and decomposition enthalpy of MeO phase on the contact area of the molten pool （CAMP） were analyzed. The effect of the density of MeO （volume fraction, %） on the contact area of the molten pool and fusion force was discussed in details. Finally, the input energy of the arc, the arc duration and the arc radius were considered to affect the contact area of molten pool as well. Comparing with the effects of MeO phase density, thermal conductivity and volume fraction etc on the contact area of the molten pool, the input energy of the arc in contact materials is the most important factor. Therefore, reducing the input energy in materials as much as possible is crucial to the research of AgMeO contact materials.

关 键 词：银一氧化物触头 温度场 电弧参数 氧化物性质 熔池接触面积 

分 类 号：TM201[一般工业技术—材料科学与工程]