Impurity Distribution in Polycrystalline Aluminum Nitride Ceramics |
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| Authors: | Daniel L Callahan Gareth Thomas |
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| Affiliation: | Department of Materials Science and Mineral Engineering, University of California at Berkeley, Berkeley, California 94720 |
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| Abstract: | Convergent-beam electron diffraction and diffuse darkfield imaging of transmission electron microscopy were used to obtain qualitative information regarding the distribution of impurities in polycrystalline AIN. Impurities are distributed homogeneously within the grains of a given ceramic, but an amorphous grain-boundary phase on the order of 1 to 2 nm in thickness is observed between the AIN matrix grains. |
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| Keywords: | aluminum nitride impurities transmission electron microscopy distribution grain boundaries |
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