在原子扩散理论分析基础上,通过热浸镀锡作为扩散过渡层的方法制备了高强界面的ZCh Sn Sb11-6/30Cr Mn Si复合材料.采用扫描电子显微镜(SEM),能谱仪(EDS)表征了ZCh Sn Sb11-6在热浸镀锌30Cr Mn Si钢表面形成的界面过渡区形貌及其元素分...在原子扩散理论分析基础上,通过热浸镀锡作为扩散过渡层的方法制备了高强界面的ZCh Sn Sb11-6/30Cr Mn Si复合材料.采用扫描电子显微镜(SEM),能谱仪(EDS)表征了ZCh Sn Sb11-6在热浸镀锌30Cr Mn Si钢表面形成的界面过渡区形貌及其元素分布,并对界面硬度和结合强度进行了表征.结果表明,通过热浸镀锡作为中间层的方法可以制备出巴氏合金/钢双金属复合材料;30Cr Mn Si钢基体与中间层金属锡形成一层互相扩散的过渡区,厚度随镀锡温度的升高而显著增加;过渡区硬度明显高于两侧基体;界面结合强度随镀锡温度的升高逐渐上升,在900℃时结合强度达到60.6 MPa.展开更多
To clarify the effect of SnO2 particle size on the arc erosion behavior of AgSnO2 contact material, Ag?4%SnO2 (mass fraction) contact materials with different sizes of SnO2 particles were fabricated by powder metallur...To clarify the effect of SnO2 particle size on the arc erosion behavior of AgSnO2 contact material, Ag?4%SnO2 (mass fraction) contact materials with different sizes of SnO2 particles were fabricated by powder metallurgy. The microstructure of Ag?4%SnO2 contact materials was characterized, and the relative density, hardness and electrical conductivity were measured. The arc erosion of Ag?4%SnO2 contact materials was tested, the arc duration and mass loss before and after arc erosion were determined, the surface morphologies and compositions of Ag?4%SnO2 contact materials after arc erosion were characterized, and the arc erosion mechanism of AgSnO2 contact materials was discussed. The results show that fine SnO2 particle is beneficial for the improvement of the relative density and hardness, but decreases the electrical conductivity. With the decrease of SnO2 particle size, Ag?4%SnO2contact material presents shorter arc duration, less mass loss, larger erosion area and shallower arc erosion pits.展开更多
基金Project(51274163)supported by the National Natural Science Foundation of ChinaProject(13JS076)supported by the Key Laboratory Research Program of Shaanxi Province,China+1 种基金Project(2012KCT-25)supported by the Pivot Innovation Team of Shaanxi Electrical Materials and Infiltration Technique,ChinaProject(2011HBSZS009)supported by the Special Foundation of Key Disciplines,China
文摘To clarify the effect of SnO2 particle size on the arc erosion behavior of AgSnO2 contact material, Ag?4%SnO2 (mass fraction) contact materials with different sizes of SnO2 particles were fabricated by powder metallurgy. The microstructure of Ag?4%SnO2 contact materials was characterized, and the relative density, hardness and electrical conductivity were measured. The arc erosion of Ag?4%SnO2 contact materials was tested, the arc duration and mass loss before and after arc erosion were determined, the surface morphologies and compositions of Ag?4%SnO2 contact materials after arc erosion were characterized, and the arc erosion mechanism of AgSnO2 contact materials was discussed. The results show that fine SnO2 particle is beneficial for the improvement of the relative density and hardness, but decreases the electrical conductivity. With the decrease of SnO2 particle size, Ag?4%SnO2contact material presents shorter arc duration, less mass loss, larger erosion area and shallower arc erosion pits.
