Study on Interfacial Bonding of TiB 2 Ceramic/Cr15 Matrix Composites

Author of the article:ZHENG Qiaoling 1 , LI Yefei 1 , WANG Guoliang 2 , CHEN Zhi 1 , GAO Yimin 1 , ZHAO Siyong 3

Author's Workplace：1. State Key Laboratory for Mechanical Behavior of Materials, Xi ’ an Jiaotong University, Xi ’ an 710049, China, 2. Rocket Force University of Engineering, Xi ’ an 710025, China, 3. Guangxi Great Wall Machinaries, Hezhou 542699, China

Key Words：TiB 2 ceramic; metal matrix composites; interface; metallurgical bonding

Abstract：The 3D connected TiB 2 ceramic preforms were prepared by the precursor method, and the 3D connected TiB 2
ceramic reinforced Cr15 matrix composites were successfully prepared by the casting and infiltration process. The interface
reaction problem was studied by using electron probe and thermodynamic calculation combined with XRD test. The results
show that the Cr15 matrix combines well with TiB 2 reinforcement, and there are no obvious pores or cracks. In the
transition zone, diffusion and interfacial reactions of Ti, B, Fe, Cr, C and other elements occur between the ceramic
reinforcement and the matrix. In the process of casting, under the action of high temperature and oxygen, the interface
reaction takes place, and the chemical reaction takes place at the interface of the composite material to form the transition
layer phase such as Ti 3 B 4 , Fe 2 Ti and TiC, and the interface shows metallurgical bonding.