Superplastic Ceramics--Today & Tomorrow (粉体および焼結体の超塑性加工<特集>)
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概要
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Superplastic elongation of fine-grained ceramics can be observed when some mechanical and microstructural requirements are satisfied at appropriate test conditions, temperature and strain rate. The phenomenon can be utilized in superplastic forming, solid-state bonding, sinter-forging, hot press, and hot-isostatic pressing. Recent advances in ceramic processing brought about not only superplastic structural ceramics (ZrO<SUB>2</SUB>, Al<SUB>2</SUB>O<SUB>3</SUB>, mullite, Si<SUB>3</SUB>N<SUB>4</SUB>. SIC and their composites), but also superplastic functional ceramics which have characteristic properties such as electronic, magnetic, optical, chemical or biological properties. Numerous works on superplasticity of ZrO<SUB>2</SUB> ceramics since 1985 revealed some characteristics of superplasticity, microstructural feature, and possible mechanisms. Attempts to achieve high-strain rate superplasticity in ceramics were performed by modifying the nature of grain boundary.
- 社団法人 粉体粉末冶金協会の論文