Synergistic Effect of Sic Particles and Whiskers on the Microstructures and Mechanical Properties of Ti(C,N)-Based Cermets

Dunlei Yan; Guangtao Xu; Zhenhua Yao; Huachen Liu; Yikun Chen

doi:10.3390/ma15062080

Synergistic Effect of Sic Particles and Whiskers on the Microstructures and Mechanical Properties of Ti(C,N)-Based Cermets

Materials (Basel). 2022 Mar 11;15(6):2080. doi: 10.3390/ma15062080.

Authors

Dunlei Yan¹, Guangtao Xu¹, Zhenhua Yao¹, Huachen Liu², Yikun Chen²

Affiliations

¹ School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
² New Tobacco Products Engineering Center, China Tobacco Hubei Industrial Co., Ltd., Wuhan 430070, China.

Abstract

The microstructure and mechanical properties of Ti(C,N)-based cermets with the addition of the SiC particles (SiC_p) and SiC whiskers (SiC_w), were systematically studied in this work. Firstly, the effect of SiC_p on the cermets was investigated independently to determine the considerable total amounts of additives, and the results showed that 2.0 wt.% SiC_p would lead to optimal properties of the cermet. Then, the influence of SiC_p and SiC_w additions with the variable ratio on the cermets was studied. The results indicated that when 1.5 wt.% SiC_p and 0.5 wt.% SiC_w were added; the cermets appeared with the best comprehensive properties, and the transverse rupture strength, hardness, and the fracture toughness of the cermets reached 2520.8 MPa, 88.0 HRA, and 16.56 MPa·m^1/2, respectively. This was due to the synergistic strengthening and toughening effect afforded by the reasonable SiC_p and SiC_w addition, from which the smallest grain size, as well as the most uniform, and completed core-rim structure of the cermets, were achieved.

Keywords: SiC particles; SiC whiskers; Ti(C,N)-based cermet; synergistic strengthening and toughening.