Abstract
The densification behavior and mechanical properties of B4C hot-pressed at 2000 °C for 1 h with additions of Al2O3 up to 10 vol% were investigated. Sinterability was greatly improved by the addition of a small amount of Al2O3. The improvement was attributed to the enhanced mobility of elements through the Al2O3 near the melting temperature or a reaction product formed at the grain boundaries. As a result of this improvement in the density, mechanical properties, such as hardness, elastic modulus, strength, and fracture toughness, increased remarkably. However, when the amount of Al2O3 exceeded 5 vol%, the level of improvement in the mechanical properties, except for fracture toughness, was reduced presumably because of the high thermal mismatch between B4C and Al2O3.
Original language | English |
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Pages (from-to) | 2863-2865 |
Number of pages | 3 |
Journal | Journal of the American Ceramic Society |
Volume | 83 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2000 |
Externally published | Yes |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry