Abstract
Silicon nitride containing various compositions of as-received TiC and TiN-coated TiC, were hot pressed at 1800°C for 1 h in a nitrogen atmosphere. In TiN-coated TiC/Si3N4 composites, TiC reacted first with the TiN coating to form a titanium carbonitride interlayer at 1450°C, which essentially reduced further reactions between TiC and Si3N4 and enhanced densification. TiN-coated TiC/Si3N4 composites exhibited better densification, hardness, flexural strength and fracture toughness than those of as-received TiC/Si3N4. The toughening mechanisms for as-received TiC/Si3N4 and TiN-coated TiC/Si3N4 composite were attributed to crack deflection, load transfer and crack impedence by the compressive thermal residual stress.
Original language | English |
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Pages (from-to) | 4899-4906 |
Number of pages | 8 |
Journal | Journal of Materials Science |
Volume | 31 |
Issue number | 18 |
DOIs | |
Publication status | Published - 1996 Jan 1 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering