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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 6    December 2003

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Microstructural evolution and characteristics during sintering of submicron Ti(C,N)-based cermet
ZHENG Yong(郑 勇)1,2, XIONG Wei-hao(熊惟皓)2
YOU Min(游 敏)1, LIU Wen-jun(刘文俊)1

1. College of Mechanical and Materials Science, 
China Three Gorges University, Yichang 443002, China;
2. College of Materials Science and Engineering, 
Huazhong University of Science and Technology, Wuhan 430074, China

Abstract:Ti(C,N)-based cermets were prepared with submicron powders. The microstructure evolution and characteristics during the sintering of cermet were studied by TEM, SEM, EDX and XRD. The forming mechanism of the structures was also studied. There exist inner rim and outer rim between the hard cores and the binder. The inner rim is enriched in Mo and W compared with the outer rim, and is formed during the solid sintering by counter diffusion of TiC, Mo2C and WC. The outer rim is formed during the liquid sintering by Ostwald ripening mechanism.

 

Key words: submicron Ti(C,N)-based cermet; microstructure; evolution; forming mechanism

ISSN 1672-7029
CN 43-1423/U

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