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Title:: Research progress on joining of ceramic reinforced titanium matrix composites

Author(s):: XU Wenlong12; ZHANG Xiangzhao1; YANG Luyao1; LIU Guiwu1; (1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China)
(2. Research Institute of Precision Casting Forging Industry, Xinghua 225714, China)

Keywords:: ceramic-reinforced titanium matrix composites; fusion welding; brazing; diffusion bonding; interfacial behavior; mechanical properties

Abstract:: Ceramic reinforced titanium matrix composites (CTMCs) possess high specific strength and stiffness, good wear and high temperature oxidation resistances. The effective joining of CTMCs can contribute to their applications in the fields of aerospace, machinery, electronics, medical apparatus, and instruments, etc. In this paper, the research progresses on fusion welding, brazing and solid phase diffusion bonding of CTMCs are reviewed. The distribution characteristics of reinforcement in the fusion welding seam, the interfacial behavior of brazing filler/base material interface, the relationship between the void ratio at the diffusion-bonding interface and joints mechanical properties are emphatically concerned. Moreover, the influences of processing parameters (such as fusion welding electrode moving speed, joining temperature and holding time of brazing and diffusion bonding) on the interfacial behavior and joint mechanical properties are summarized by combining with the respective joining processes. Finally, we consider that the related investigations on joining of CTMCs, thermodynamics, and dynamics of formation of interfacial reaction layer, the relationship between interfacial microstructures and joint performances (strength and high temperature resistance) need to be strengthened.