410 小角中性子散乱法による超塑性変形した3Y-TZPにおけるキャビティ特性(オーガナイズドセッション : 超塑性と材料および造形法)

概要

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A trial by using a small angle neutron scattering (SANS) method which is known to be used to study microstructural phenomena in the range of 1 to 10^4 nm in size, was performed to measure properties of the cavities in superplastically deformed 3mol% yttria stabilized tetragonal zirconia polycrystal (3Y-TZP). Tensile test specimens of 3Y-TZP were pulled at 1723 K in the air to nominal strains from 0.0 to 200 %. As a result, volume fractions of cavities measured by SANS which was set to be able to measure microstructural size below 1μm were close to those of Archimedes method and somewhat lower than those of SEM. Nearly spherical cavities existed in undeformed and lightly deformed specimens, while prolate ones in the specimen with large superplastic deformations. The major axis of cavities was parallel to the tension axis.
社団法人日本機械学会の論文
2001-09-20