Phase Relations and Reaction Sintering of Transparent Cubic Aluminum Oxynitride Spinel (ALON) |
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| Authors: | JAMES W McCAULEY N D CORBIN |
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| Affiliation: | Army Materials and Mechanics Research Center, Watertown, Massachusetts 02172 |
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| Abstract: | A new isobaric, condensed phase diagram in the region of stability of cubic aluminum oxynitride spinel (ALON) along the pseudobinary AI2O3-AIN composition join is presented, deduced primarily from various analytical measurements and microstructural observations. It is shown that cubic aluminum oxynitride spinel melts incongruently at ?2050°C and is compositionally centered at ?35.7 mol% AIN, which is equivalent to the following stoichiometric composition: AI23O27N5 or 5AIN·9AI2O3. Single-phase ALON material sintered to nearly full density exhibits transparency in visible light. |
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