Abstract
The processing problems associated with boron carbide and the limitations of its mechanical properties can be significantly reduced when a metal phase (e.g., aluminum) is added. Lower densification temperatures and higher fracture toughness will result. Based on fundamental capillarity ther modynamics, reaction thermodynamics, and densification kinetics, we have established reliable criteria for fabricating B4C–Al particulate composites. Because chemical reactions cannot be eliminated, it is necessary to process B4C–AI by rapidly heating to near 1200°C (to ensure wetting) and subsequently heat‐treating below 1200°C (for microstructural development).
Original language | English (US) |
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Pages (from-to) | 775-780 |
Number of pages | 6 |
Journal | Journal of the American Ceramic Society |
Volume | 72 |
Issue number | 5 |
DOIs | |
State | Published - May 1989 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
Keywords
- aluminum
- boron carbide
- cermets
- composites
- processing