Hot Hardness Behavior of Yttrium Sialon Ceramics |
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| Authors: | Thommy Ekström Jeanette Persson |
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| Affiliation: | Department of Inorganic Chemistry, Arrhenius Laboratory, University of Stockholm, S-106 91 Stockholm, Sweden |
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| Abstract: | The hot hardness of polycrystalline single-phase α- or β- sialon ceramics declines with increasing temperature, but the measured Vickers hardness (HV1) at 1100°C is still about 1550 and 1300 for the α-sialon and the low-substituted β-sialon materials, respectively. The hardness of 'composite'β- or α-β-sialon ceramics containing a high volume fraction of glassy phase is lower at all temperatures and drops significantly above about 900°C. |
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| Keywords: | sialons silicon nitride hardness temperature dependence microstructure |
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