Compression Properties and Work-Hardening Behavior of the Nial Matrix Composite Reinforced with in Situ Tac Ceramic Particulates

A comprehensive analysis of the microstructure, compression performance and work hardening capacity of an in situ ceramic-reinforced NiAl matrix composite through the integration of combustion synthesis and hot pressing was investigated. The results showed that the grain size of the composite containing 5 vol% TaC ceramic particles was refined by 64%. Meanwhile, there was a small lattice mismatch between NiAl matrix and TaC ceramic particles, which also means that the low-energy interface between the NiAl and TaC contributed to the stability of the interface combination. Furthermore, the yield strength, maximum compression stress and strength ductility balance of the composite were increased by 31%, 26% and 15%, respectively. This paper focuses on the mechanical properties and mechanism of a NiAl matrix composite with 5 vol% in situ TaC ceramic particles at room temperature.