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采用反应合成法制备Ag-CeO2复合材料,研究了Ag-CeO2复合材料的物相,在大塑性变形加工条件下的组织均匀化过程,以及Ag-CeO2复合材料的显微组织和物理性能的演变。XRD、SEM及能谱分析结果表明:通过反应合成法可以在Ag基体中合成尺寸细小的Ag-CeO2复合材料,其显微组织为Ag基体中分布着细小CeO2颗粒的团聚物。经过累积大塑性变形加工能够对Ag-CeO2复合材料的显微组织起到均匀化和弥散化作用。Ag-CeO2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。
The Ag-CeO2 composites were prepared by reaction synthesis. The phase of Ag-CeO2 composites, the homogenization of the composites under the condition of large plastic deformation and the evolution of the microstructure and physical properties of Ag-CeO2 composites were studied. . The results of XRD, SEM and EDS showed that Ag-CeO2 composites with small size could be synthesized by Ag reaction. The microstructure of Ag-CeO2 composites was the agglomerates with fine CeO2 particles dispersed in Ag matrix. After a large plastic deformation processing can Ag-CeO2 composite microstructure play a role in homogenization and dispersion. The tensile strength and electrical resistivity of Ag-CeO2 composites decrease with the increase of true strain, and the elongation increases with the increase of true strain.