Abstract
Anisotropic grain growth in mullite was investigated in B2O3-doped diphasic gels seeded with either mullite particles or whiskers. Anisotropic grain growth was observed in all systems. The largest anisotropic grains were obtained with a system seeded with 2 wt% mullite whiskers and doped with 2 wt% B2O3. The mullite whiskers act as sites for multiple nucleation and subsequently as templates for mullite overgrowth. Boria lowered the mullite formation temperature by 150° C and it significantly enhanced anisotropic grain growth independent of the presence of seed particles. This enhancement was attributed to increased dissolution of alumina.
Original language | English (US) |
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Pages (from-to) | 133-141 |
Number of pages | 9 |
Journal | Journal of the European Ceramic Society |
Volume | 16 |
Issue number | 2 SPEC. ISS. |
DOIs | |
State | Published - 1996 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry