Study on the phase evolution, microstructure and densification behavior of (Ti,M)(C,N)-based cermets

• Published in: Materials chemistry and physics Vol. 240; p. 122249
• Main Authors: Xiong, Zhengzhuo, Ye, Jinwen, Liu, Ying, Yang, Xiaojiao, Cao, Qian
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.01.2020; Elsevier BV
• Subjects: Cermets; Creep rupture strength; Densification; Densification behavior; Deoxidizing; Evolution; Liquid phases; Microstructure; Phase evolution; Sintering; Solid phases; Ti,M)(C,N)-based cermets; Vacuum sintering; Weak core/rim structure; Phase evolution; Densification behavior; Microstructure; Weak core/rim structure; Ti,M)(C,N)-based cermets
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2019.122249

(Ti,M)(C,N)-Based Cermets were synthesized from (Ti,M)(C,N)-Ni-Co composite powders by vacuum sintering. The material phase evolution, microstructure and densification behavior were investigated under different sintering temperature from 800 °C to 1400 °C. Results showed that deoxidation occurred and solid phase diffusion observed below 1200 °C. The solid phase liquidization appeared from 1200 °C to 1350 °C, resulting in decrease of pores in the material. Above 1350 °C, the liquid phase fully melted to fill the pores of material, and the cermets approach densification lead to the maximum value of its transverse rupture strength and hardness. (Ti,M)(C,N)-based cermets prepared by vacuum sintering have a hard phase of “weak core/rim structure". •(Ti,M)(C,N)-based cermet with"weak core/rim structure"was prepared by vacuum sintering.•Both the core and rim phase were (Ti,M)(C,N) solid solution with similar composition.•Cermet reached densification by vacuum sintering.•Low-pressure sintering could improve the mechanical properties of cermet.