Abnormal Grain Growth Mechanism of Calcium Hexaluminate Phase
| Autor: | Young Jin Jo, Sang Yeup Park, Hee Gon Bang, Jun Ho Song |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Spinel Fracture mechanics Crystal structure Abnormal grain growth engineering.material Condensed Matter Physics Microstructure Mechanics of Materials Phase (matter) engineering General Materials Science Cubic zirconia Composite material Damage tolerance |
| Zdroj: | Materials Science Forum. :485-488 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.534-536.485 |
| Popis: | Calcium-hexaluminate phase(CA6) phase is known to be effective for the crack shielding due to the spinel block crystal structure. In this study, we focused to control the CA6 morphology for the good damage tolerance behavior in alumina and zirconia/calcium-hexaluminate(CA6) composites. calcium-hexaluminate(CA6) composites were prepared from zirconia, alumina and calcium carbornate powders. Calcium-hexaluminate(CA6) phase was obtained by the solid reaction through the formation of intermediate phase(CA2). CA6 phase showed column type abnormal grain grown behavior composed of small blocks. Due to the typical microstructure of CA6, alumina and zirconia/calcium-hexaluminate composites provide well controlled crack propagation behavior. |
| Databáze: | OpenAIRE |
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