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Production of Metal - Ceramic FGM with High Resistance to Impacts

A shortcoming of modern metal-ceramic hard alloys is low shock viscosity, limiting their application. Novel materials, based on TiC-Ni and TiC-Cr 3 C 2 -Ni with asymmetrical gradient Ni distribution through thickness have been produced by application of SHS pressing. Plates with dimensions of 70×70×7 mm have been synthesized. Production modes have been optimized and structure and properties have been investigated. It is shown that the structure and components of the plates are true to FGM type, with one plate surface having high hardness and wear-resistance and the other consisting of pure Ni with Ni content varying gradually into the plate. Resistance to impact has been studied with conventional equipment at various impact velocities. Plates made of corresponding homogeneous alloys served as control. According to the results of experiments, it is confirmed that resistance to impacts of the metal-ceramic FGM is 30-40% higher than that of homogeneous alloys.