Processing and microstructure of Ti_3SiC_2/M (M=Ni or Co) composites

摘要

Ti_3SiC_2/M (M=Ni or Co) composites were synthesized through powder metallurgy technology. It was found that the metal atoms tended to aggregate towards the sample surface. As a result, layered microstructures were formed. The outer layer was composed of exuded metal/ alloy, wrapped Ti_3SiC_2 and TiC particles. The porous transition layers consisted of continuous metal nets and ceramic inclusions while loose Ti_3SiC_2and TiC particles were located in the inner layers. The above microstructural features were attributed to the poor wettability between Ti_3SiC_2 and Ni or Co under the present processing conditions.