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The target of this work is to investigate the effects of the relative amounts of the main impurities usually encountered in an alumina powder obtained from the Bayer process. On that purpose, the amounts of Na 2 O and SiO 2 present in a commercial powder, have been modified by doping. The sintering behavior and the microstructure of the sintered ceramics have been investigated. The...
In ceramic matrix composites, it is now well known that the cyclic fatigue effects are due to a decrease of the stress transfer capability of the fibres that bridge the matrix cracks, because of some wear induced by the seesaw displacements at the interfaces. Therefore, a better knowledge of the cyclic fatigue effects needs a deeper understanding of the microscale mechanisms operating during the friction...
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