Investigation on microstructure and performance of Ag/ZnO contact material
Investigation on microstructure and performance of Ag/ZnO contact material
复制标题
DOI：
10.1016/j.jallcom.2007.03.099
复制
发表时间：
2008-06
影响因子：
6.2
通讯作者：
Chong-hu Wu;D. Yi;Junlin Li;L. Xiao;Bin Wang;F. Zheng
中科院分区：
文献类型：
--
作者：
Chong-hu Wu;D. Yi;Junlin Li;L. Xiao;Bin Wang;F. Zheng
采用气体雾化内氧化锻造技术制备了Ag/ZnO触头材料。研究了气体雾化Ag/Zn合金粉末的粒度、形貌和成分，利用X射线衍射仪（XRD）、光学显微镜（OM）和扫描电镜（SEM）分析了粉末的相组成、显微结构和物理性能。此外，还对银基合金的氧化机理进行了探讨。结果表明：82%的雾化Ag/Zn合金粉末粒径小于125μm，形状不规则;显微组织均匀，接触电阻为2.10μΩcm，相对密度为98%，硬度为102.8HV。其性能明显优于传统的粉末冶金方法。银基合金的氧化过程受氧扩散控制。
Ag/ZnO contact material was prepared by gas atomization internal oxidation forging technology (AIOF technology). The granularity, morphology and component of gas atomized Ag/Zn alloy powder were studied; the phase constitution, microstructure and physical performance were analyzed by X-ray diffraction (XRD), optical microscope (OM) and scanning electron microscope (SEM), respectively. Furthermore, the oxidation mechanism of Ag-based alloy was also discussed. The results showed that 82% gas atomized Ag/Zn alloy powders were less than 125μm in diameter of irregular shape. The microstructure was homogeneous with electrical contact resistance equal to 2.10μΩcm and of 98% relative density and hardness of 102.8HV. The performance was much better than that prepared by conventional powder metallurgy method. The oxidation of Ag-based alloy was considered to be controlled by oxygen diffusion.