CAJ | 학술논문

采用放电等离子烧结(SPS)技术制备了Ag-10%SnO2电接触材料。对材料的微观结构，断口形貌，电弧侵蚀表面形貌和烧结过程进行了研究。实验结果表明，Ag-10%SnO2电接触材料的 SPS过程由3个基本阶段构成。在SPS过程中，颗粒的形状和尺寸随晶界的形成而发生变化。所得材料显微组织显示，SnO2颗粒弥散分布于Ag基体中，无颗粒聚集现象。SPS技术烧结的Ag-10%SnO2材料由于晶粒细小而具有较高的强度与较好的塑性。在800℃/5 min的烧结条件下，材料的拉伸断口形貌出现较多大而深的韧窝，韧窝中包含氧化物颗粒。Ag-10%SnO2电接触材料的断裂模式为微孔缩聚塑性断裂。材料的电弧侵蚀表面显示出大量的浆糊状凝固物和气泡。
채용방전등리자소결(SPS)기술제비료Ag-10%SnO2전접촉재료。대재료적미관결구，단구형모，전호침식표면형모화소결과정진행료연구。실험결과표명，Ag-10%SnO2전접촉재료적 SPS과정유3개기본계단구성。재SPS과정중，과립적형상화척촌수정계적형성이발생변화。소득재료현미조직현시，SnO2과립미산분포우Ag기체중，무과립취집현상。SPS기술소결적Ag-10%SnO2재료유우정립세소이구유교고적강도여교호적소성。재800℃/5 min적소결조건하，재료적랍신단구형모출현교다대이심적인와，인와중포함양화물과립。Ag-10%SnO2전접촉재료적단렬모식위미공축취소성단렬。재료적전호침식표면현시출대량적장호상응고물화기포。
Ag-10%SnO2 electrical contact material was prepared by spark plasma sintering. The microstructures, fracture appearances, arc erosion surfaces and sintering process of the material were investigated. The experimental results showed that there are three basic stages in the spark plasma sintering process. During the sintering process, the shape and size of each particle changed with the formation of grain boundaries. The SnO2 particles distribute diffusely in Ag matrix, and there is no particles gathering together in the matrix. The Ag-10%SnO2 material thus prepared could keep the grains fine and has high strength and good ductility due to fine grain strengthening. The tensile fracture morphology of the material heated by SPS at 800℃for 5 min shows a great number of large and deep dimples, in which the oxide particles exist. The fracture mode of the Ag-10%SnO2 material is the microporous polycondensation plastic fracture. The arc erosion surfaces of the material show a large number of paste-like coagulum and bubbles.