Abstract
TiB-TiB2 ceramic composites are in situ synthesized by spark plasma sintering technique under a pressure of 50 MPa, with sintering temperature ranging from 800°C to 1700°C and a heating rate of 150°C/min, using Ti and TiB2 powders. Microstructures and mechanical properties of the composites sintered at different temperatures were investigated. According to the microstructure evolution of the composites, the description of the sintering process can be divided into 3 stages: splashing of metal Ti under the discharge effect, reaction of the molten Ti with TiB2, and rapid densification of the composites due to the rapid solid-state diffusion and large plastic deformation result from the Joule heating effect and pressure loading effect.
| Original language | English |
|---|---|
| Pages (from-to) | 492-495 |
| Number of pages | 4 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 30 |
| Issue number | 4 |
| Publication status | Published - Apr 2010 |
Keywords
- Densification mechanism
- Spark plasma sintering
- TiB-TiB ceramic composites