Abstract
Mullite phase formation and grain growth, in a CuO-doped Al2O3and silica mixture, has been investigated. The oxide mixture was activated with both stainless steel and tungsten carbide milling media. The milled powders demonstrated a much lower mullite formation temperature when compared to the conventional solid-state reaction process. Anisotropic grain growth was observed in the powders milled with stainless steel media, while well-shaped mullite whiskers were produced in the WC milled samples. The lowered mullitization temperature together with the anisotropic grain growth behavior was attributed to the refined microstructure of the powders as a result of the high-energy ball milling process.
Original language | English |
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Pages (from-to) | 3660-3666 |
Number of pages | 7 |
Journal | Materials Letters |
Volume | 57 |
Issue number | 22-23 |
DOIs | |
Publication status | Published - 1 Jul 2003 |
Externally published | Yes |
Keywords
- Anisotropic grain growth
- High-energy ball milling
- Mullite
- Mullitization
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering