遠心フィルター成形法と速度制御焼結法を併用した積層複合材料の作製

概要

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Multilayer composites (MLCs) of alumina and yitria doped tetragonal zirconia (YTZ) with the layer thick ness of 50-200 μm have been fabricated. A combination of centrifugal filter pressing and rate controlled sinter ing has been proposed for preparing MLCS with a strengthened layer interface. Centrifugal pressing was efficiently used to strengthen the layer interface by introducing the compositional gradient. Rate con trolled sintering reduced interlayer stress generation during sintering, prevented delamination and con tributed to the strengthening of the interface. It was considered that the strengthened layer interface con tributed to the toughening of MLCS by means of (1) effective crack deflection in the alumina layers, (2) en hanced transformation toughening due to a deformed frontal zone shape in the YTZ Iayer constrained be tween the alumina layers, and possibly (3) crack pin ning at the layer interface.
社団法人日本セラミックス協会の論文
1994-07-01