中文摘要：

研究了银氧化锡电触头材料的反应合成制备以及制备的银氧化锡电触头材料在大塑性变形加工条件下的组织均匀化过程。XRD、SEM、TEM和能谱分析结果表明，反应合成制备的银氧化锡电触头材料的显微组织为纳米氧化锡团聚颗粒生长在银基体颗粒的周围形成大基体、小颗粒的环状。通过对反应合成银氧化锡电触头材料在真应变为4和12大塑性变形条件下显微组织的研究，发现经过大塑性变形加工技术能够对银氧化锡电触头材料显微组织起到均匀化和弥散化作用，且真应变为12的AgSnO2触头材料的组织均匀化程度与抗拉强度都好于真应变为4的AgSnO2触头材料的。

英文摘要：

The fabrication of silver tin oxide by reactive synthesis and the mierostrueture homogenization of reactive synthesis silver tin oxide in the severe plastic deformation were researched. The results of XRD, SEM, TEM and EDX analysis show that the mierostrueture character of the silver tin oxide is ring shape with bigger matrix and smaller oxide particle formed through the nano-partiele of tin oxide accumulating around silver matrix particle. The mierostrueture change in the severe plastic deformation was researched. The results show that the mierostrueture can be homogenized by severe plastic deformation, and the homogenization degree and tensile strength under true strain 12 are better than that under true strain 4.