The recently developed, novel superhard nanocrystalline composites nc-TiN/a-Si3N4 have been investigated by means of high resolution transmission electron microscopy. The microstructure consisting of nanocrystalline TiN imbedded within a⩽1 nm thin amorphous Si3N4, the relative amount of both phases, and the TiN-crystallite size which were previously determined by means of x-ray diffraction and energy dispersive analysis of x rays have been directly confirmed.
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Christiansen et al. (1998) studied this question.
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