中文摘要：

采用反应合成法制备出Ag—Y2O3复合粉体，研究了大挤压比挤压工艺对Ag—Y2O3（Y2O3质量分数为8％）复合材料显微组织、力学和电学性能的影响。结果表明：通过反应合成技术可以在Ag基体中形成尺寸细小的Y2O3颗粒；大塑性变形加工能够对Ag—Y2O3复合材料的显微组织起到均匀化和弥散化作用；Ag—Y2O3复合材料的显微组织为Ag基体中分布着细小Y2O3颗粒的复相组织；Ag—Y2O3复合材料的抗拉强度、电阻率等随真应变的增加而降低，延伸率随真应变的增加而提高。

英文摘要：

The Ag-Y2O3 composites were prepared by reaction synthesis processing, and the effect of severe plastic deformation on the microstructure, mechanical and electrical properties of Ag-Y2O3 composites were also studied. The results show that the fist, some tiny AgY2O3 in the Ag-matrix can be formed during reactive synthesis： The second, cumulative plastic deformation can make the size of Y2O3 clusters to decrease and make the Y2O3 clusters distributed in the Ag matrix, finally, with the increase of true strain, the tensile strength as well as electrical resistivity are reduced, while the elongation is increased.