Abstract
βSiAlON-cubic boron nitride (cBN) composite was prepared by spark plasma sintering (SPS) using β-SiAlON and cBN powders as starting materials, and the effect of holding time on densification, phase transformation and hardness of the composite was investigated. The βSiAlON-cBN composite containing 20 vol% cBN sintered at 1650°C for 60s was densified to >97% of theoretical density. cBN phase transformed to hexagonal boron nitride (hBN) in the βSiAlON-cBN composite with increasing holding time at 1650°C. Vickers hardness of the βSiAlON-20vol%cBN composite sintered at 1650°C for 60-300s was 17.7GPa, and the hardness decreased with increasing holding time.
| Original language | English |
|---|---|
| Pages (from-to) | 241-242 |
| Number of pages | 2 |
| Journal | Key Engineering Materials |
| Volume | 403 |
| DOIs | |
| Publication status | Published - 2009 |
Keywords
- Cubic boron nitride
- Hardness
- Holding time
- Phase transformation
- SiAlON
- Spark plasma sintering
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering