Abstract
Bonding of titanium silicon carbide Ti3SiC2 by using slurry spin coating and reactive sintering techniques was investigated. Ti, Si and TiC powders were blended at a molar ratio of Ti:Si:TiC=2:2:3, from which highly pure Ti3SiC2 can be synthesized, and suspended in ethanol to prepare slurry. Test pieces of Ti3SiC2 were spin coated with the slurry at various conditions and the composition of coated layer was analyzed by EDX. The coated layer had Si-rich and Ti-poor composition compared with the slurry. The test pieces coated with the slurry were superimposed one on the other and sintered by a hot press at various temperatures. During sintering, the powder blend in the coated layer was reacted and sintered, and the pieces were bonded. The bonding layer was 20 or 30 micrometers in thickness and showed finer grain size than the test pieces. The layer had pores in spots and the number of pores tended to decrease with increasing bonding temperature. The composition of bonding layer tended to move toward the composition of test pieces with increasing bonding temperature, which suggests the diffusion of Si and C between the bonding layer and test pieces.
