509 Zr イオン照射した 3Y-TZP の 293∿1573K 焼鈍による特性の変化

概要

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Recently, it has become clear that some of structural ceramics show superplasticity, i.e., very high ductility. Applications of the superplastic phenomena found in the ceramics are very promising, because the structural ceramics, which usually possess more superior mechanical and thermal properties than metallic materials except for their brittle behavior, can be formed into complicated shapes by means of plastic working. The superplastic ceramics have potential ability for applications to atomic energy fields. Up to date, however, as far as we know, there have been few studies concerning the effects of irradiations on the properties of the superplastic ceramics. In this study, the effects of Zr ion irradiation on the mechanical properties of a typical superplastic ceramic 3mol% yttria containing tetragonal zirconia polycrystals (3Y-TZP) were examined and discussed. The effect of annealing on the variations of these properties were also investigated. It was found that the grain boundaries became relatively hence weak and deteriorated the mechanical properties of irradiated 3Y-TZP. The influence of Zr ion irradiation on the mechanical properties almost disappeared when the irradiated 3Y-TZP was subsequently annealed at 1173K.
一般社団法人日本機械学会の論文
2002-08-23