Hot Shock Welding Applications for Layered Composite Consisting of Non-oxide Ceramics and Metal


 
Ryuichi Tomoshigea, Kanako Sonodaa, Takumi Nakamuraa, Takuma Tanakaa, Seiichiro Iib, Yasuhiro Morizonoc
aSojo University, Ikeda, Nishi-ku, Kumamoto, Japan
bNational Institute for Materials Science, Tsukuba, Ibaraki, Japan
cNational Institute of Technology, Kurume College, Kurume, Fukuoka, Japan
(8 pages)

https://doi.org/10.29272/cmt.2018.0013

Abstract

A novel technique on hot explosive welding has been developed for fabricating layered composites consisting of ceramics and metal. The technique uses a simple processing which combines shock loading and combustion synthesis. The two types of trilayer composites which consisted of TiB2+TiN ceramics, TiNi and steel, or TiB2 ceramics, TiNi and steel, were fabricated by the hot explosive welding with a cohesive and strongly joined interface. Optimum fabrication conditions such as flying method of flyer plate, the amount of explosive, time window and buffer materials were investigated. Consequently, time window and the quantity of explosive affected their welding states significantly. After thermal shock test of the specimens at temperature of 500 °C into water, no exfoliation at the interfaces of the composite were shown. It was suggested that pseudo elasticity of TiNi intermetallic layer was effective for relaxation of thermal stress operated between ceramics and steel at elevated temperatures.
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