Abstract
Dense B4C matrix composites were synthesized by a spark plasma sintering (SPS) process using CeO2 powder as the sintering aid. The effects of CeO2 on densification and properties of B4C were studied, and it was compared with the specimen without additive. X-ray diffraction and scanning electron microscopy were employed to examine the phase and microstructure of the composites, respectively. The results indicate that the addition of CeO2 powder can significantly improve the sintering property of B4C. The relative density of the samples increases because the generated CeB6 between B4C grains. The specimen with 4wt% CeO2 sintered at 1750℃ under 35 MPa exhibits the highest relative density of 96.7% and Rockwell hardness of 89.6.
Original language | English |
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Pages (from-to) | 2071-2074 |
Number of pages | 4 |
Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
Volume | 45 |
Issue number | 8 |
Publication status | Published - 1 Aug 2016 |
Keywords
- Boron carbide
- Cerium hexaboride
- Cerium oxide
- Densification
- SPS