High-Temperature Mechanical Properties of Mullite Under Compression |
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| Authors: | P C DOKKO JOSEPH A PASK K S MAZDIYASNI |
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| Affiliation: | Department of Materials Science and Engineering, College of Engineering, University of California, Berkeley, California 94720;Air Force Materials Laboratory, Wright-Patterson Air Force Base, Ohio 45433 |
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| Abstract: | The high strength potential of single-phase mullite was investigated under compressive stress-strain and creep testing conditions at 1400° and 1500°C. In single-crystal experiments, no plastic deformation and, hence, no dislocation glide was observed. Polycrystalline mullite was deformed via the Nabarro-Herring mechanism accompanied by grain-boundary sliding and some cavitation. In stress-strain tests, deformation was enhanced by intergranular separation. |
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