Abstract
Model ceramic matrix composites have been manufactured in a wide range of materials using the precipitation of a metal (Cu, Ni, Cr) in a ceramic matrix (nitride AlN or oxides MgO, Al 2 O 3 ) providing, in each case, low energy configurations at the heterophase interfaces. In connection to microelectronic applications, copper metallic particles precipitate in AlN after implantation by copper ions and anneal of the ceramic matrix. Faceted particles are imaged by HRTEM an are associated to a low energy structural and chemical configuration. Internal reduction experiments have been carried out on (Mg,Ni)O, (Mg,Cu)O and (Al,Cr)203 mixed oxides; the morphology, chemical composition and orientation relationship of the different precipitates are obtained through TEM observations and discussed in terms of interfacial energy and precipitate growth mechanism and kinetics. Conventional and high resolution TEM in conjonction to structural models have allowed a comprehensive description of the interface
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