Enhanced Interface Structure and Properties of Titanium Carbonitride-Based Cermets with the Extra Solid Phase Reaction

Nan Lin; Yuehui He; Xiyue Kang

doi:10.3390/ma10091090

Enhanced Interface Structure and Properties of Titanium Carbonitride-Based Cermets with the Extra Solid Phase Reaction

Materials (Basel). 2017 Sep 15;10(9):1090. doi: 10.3390/ma10091090.

Authors

Nan Lin¹, Yuehui He², Xiyue Kang³

Affiliations

¹ College of Materials Science and Engineering, Hunan University, Changsha 410082, China. linnan@csu.edu.cn.
² State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China. yuehui@csu.edu.cn.
³ State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China. xiyuekang@csu.edu.cn.

Abstract

In this paper, the influence of the extra solid phase reaction on the interface structure and mechanical properties of titanium carbonitride-based cermets were investigated. The extra solid phase reaction in the preparation process of cermets could induce the formation of a core/rim/binder interface with the coherent structure and reinforce the interface bonding strength in cermets. The existence of a coherent structure interface can inhibit crack spread and improve the toughness and abrasion resistance of titanium carbonitride-based cermets significantly. Cermets can exhibit the high hardness Rockwell Hardness A (HRA) 92.3, fracture toughness of 11.6 MPa·m^1/2, and transverse rupture strength of 2810 MPa.

Keywords: abrasion resistance; cermets; interface structure; mechanical properties; transmission electron microscopy.