TiCN-Based Cermets Strengthened with SiC Nano-Whiskers by Spark Plasma Sintering

TiCN-based cermets with different amounts of SiC nano-whiskers were prepared by spark plasma sintering. The microstructure and mechanical properties of the as-prepared cermets were investigated. X-ray diffraction revealed that there were no SiC peaks detected, turning out some peaks of new carbide a...

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Bibliographic Details
Published in:Key engineering materials 2012-06, Vol.512-515, p.932-935
Main Authors: Wang, Cheng Biao, Peng, Zhi Jian, Fu, Zhi Qiang, Ren, Xiao Yong, Miao, He Zhuo, Qi, Long Hao, Peng, Ying, Rong, Hui Yong
Format: Article
Language:English
Subjects:
Cermets
Flexural strength
Fracture mechanics
Hardness
Modulus of rupture in bending
Nanostructure
Silicon carbide
Spark plasma sintering
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Summary:TiCN-based cermets with different amounts of SiC nano-whiskers were prepared by spark plasma sintering. The microstructure and mechanical properties of the as-prepared cermets were investigated. X-ray diffraction revealed that there were no SiC peaks detected, turning out some peaks of new carbide and silicate hard phases. Scanning electron microscopy indicated that there were more and more pores in the cermets with increasing amount of SiC whisker added, and the fracture mechanism of the cermets was mainly inter-granular fracture. With increasing addition amount of nano-SiC whisker, the hardness and flexural strength of the cermets increased first and decreased then, presenting the highest hardness (2170 HV) and flexural strength (750 MPa), respectively, when the addition content of nano-whiskers is 2.5 wt%.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.512-515.932