Hot Dynamic Densification of Materials by Utilizing Underwater Shock Wave

Abstract:

Hot dynamic densification method was developed by combining self-propagating high temperature synthesis (SHS) with explosively shock powder compaction technique. This method is extremely short time processing. The main purpose in this study is to perform from synthesis to densification of TiB₂-TiN system high temperature ceramic composites and TiB₂-TiNi-Cu system functionally graded materials (FGMs) in one step. In TiN-TiB₂ ceramic composites, they showed up to 95% of relative density. It was appeared by TEM observations that both the two phases joined tightly each other. The FGMs also were produced by the same technique. They indicated no interlayer exfoliation and no macro cracks after thermal shock tests from 973 K to room temperature. It was shown that thermoelastic property of intermetallic TiNi phase as intermediate layer between ceramics and metal layers operated effectively.

• Periodical: Materials Science Forum (Volumes 706-709)
• Pages: 793-798
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.793
• Online since: January 2012
• Authors: Ryuichi Tomoshige, Seiichiro Ii, Masahiro Fujita, Akira Chiba
• Keywords: Ceramic Composite, Densification, FGM, Shock Wave, SHS

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