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

Abstract:

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%.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 932-935
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.932
• Online since: June 2012
• Authors: Ying Peng, Zhi Jian Peng, Xiao Yong Ren, Hui Yong Rong, Cheng Biao Wang, Zhi Qiang Fu, Long Hao Qi, He Zhuo Miao
• Keywords: SiC Nano-Whisker, Spark Plasma Sintering (SPS), TiCN Cermet

References

[1] P. Ettmayer, H. Kolaska, W. Lengauer, Ti(C,N) cermets—metallurgy and properties, J. Int. J. Refract. Met. Hard Mater. 13 (1995) 343-351.

DOI: 10.1016/0263-4368(95)00027-g

[2] H.A. Zhang, J.Y. Yi, S.Y. Gu, Mechanical properties and microstructure of Ti(C,N) based cermets reinforced by nano-Si3N4 particles, J. Int. J. Refract. Met. Hard Mater. 29 (2011) 158-162.

DOI: 10.1016/j.ijrmhm.2010.09.010

[3] A. Bellosi, R. Calzavarini, M.G. Faga, Characterisation and application of titanium carbonitride-based cutting tools, J. Mater. Process. Tech. 143-144 (2003) 527-532.

DOI: 10.1016/s0924-0136(03)00339-x

[4] J. Qu, W.H. Xiong, Y.L. Ke, Microstructure and mechanical properties nano-SiC whisker reinforced Ti(C,N)-based cermets, Materials for Mechanical Engineering. 33 (2009) 62-65.

[5] W. Peng, Y. Zheng, Y.L. Zhao, Effect of SiC whisker addition on the microstructures and mechanical properties of Ti(C, N)-based cermets, Mater. Design 32 (2011) 951-956.

DOI: 10.1016/j.matdes.2010.07.028

[6] Y.H. Xia, P. Feng, Y.B. Hu, Ti(C,N)-based cermet fabricated by spark plasma sintering, Materials for Mechanical Engineering 28 (2004) 29-31.

[7] X.T. Pan, H.Z. Miao, J.H. Gong, Influence of metallic binder content on the microhardness of TiCN-based cermet, J. Rare Metal Mater. Eng. 33 (2004) 1069-1071.