Abstract
Microcrystalline inclusions in the core of {beta}-SiC whiskers derived from the pyrolysis of rice hulls have been studied by transmission electron microscopy using conventional bright-field and dark-field imaging. The electron diffraction patterns from the whiskers show extra reflections arising from these inclusions. Dark-field images from these reflections are consistent with the presence of three different variants of inclusions, all of which are oriented with their [001] axes parallel to the heavily faulted [111] growth axis of the whiskers. A structural model for these inclusions is proposed which accounts satisfactorily for the extra reflections in the electron diffraction patterns.
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