反应合成与大塑性变形制备AgMeO电接触材料的组织形貌特征

Microstructures of AgMeO Electric Contact Materials by Reactive Synthesis and Severe Plastic Deformation

采用反应合成制备技术与大塑性变形加工技术,研究了银氧化锡(AgSnO2)、银氧化铜(AgCuO)、银氧化钇(AgY2O3)3种电接触复合材料的组织均匀化。结果表明,在相同工艺条件下,通过反应合成技术所制备的3种电接触复合材料具有不同的显微组织形貌。产生这种现象的原因主要是合金体系中元素性质不同,使得反应合成制备中元素的扩散机制不同所造成的。通过大塑性变形加工,能够对不同显微组织形貌复合材料的显微组织进行均匀化处理,只是对于不同的材料体系,对大塑性变形强度有不同的要求。

The microstructure homogenizations of AgSnO2, AgCuO and AgY2O3 electric contact materials prepared by reactive synthesis process and severe plastic deformation process were investigated. The result showed that the microstructures of the three electric contact materials were different under the same process conditions. The main reason of the above mentioned results is attributed to different diffusion mechanisms which are caused by different element natures in the alloy system. The microstructures of the three electric contact materials can be homogenized by severe plastic deformation, Fore the different electric contact material systems, different plastic deformation degrees are required.