Fabrication of titanium-based composites with intermetallics using shock-induced reaction for mixed element powders

摘要

The process of shock-induced reaction for a mixture of element powders is investigated using underwater shock wave assembly. The critical condition for the reaction of Ti and Si powder mixture to synthesize Ti{sub}5Si{sub}3, which has a high melting temperature (2403 K), is clearly suggested, but the recovered sample shows many pores due to excessive reaction heat. To improve the conditions for recovery, nonreactive powder is admixed with the mixture of Ti and Si, and the nonreactive powder is effective in releasing the excessive heat of reaction. Some composites such as Ti{sub}5Si{sub}3/Ti and Ti{sub}5Si{sub}3/TiAl are fabricated and show a good microstructure without defects.