2732 ラマン分光法を用いた人工関節用セラミックス材料の残留応力評価(S28-2 セラミックスおよびセラミックス系複合材料(2),S28 セラミックスおよびセラミックス系複合材料)

概要

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The changes in the residual stresses and crystalline forms on the local area of 3mol% yttria stabilized tetragonal zirconia polycrystalline (3Y-TZP) and high-purity alumina for artificial joints were examined by Raman spectroscopy technique. The stress dependence of the peak positions of Raman/fluorescence spectra was estimated by four-point bending method, and then the residual stress and monoclinic fraction around the Vickers indentation were determined In both 3Y-TZP and alumina, there was a linear relationship between the peak position and the applied stress. As for 3Y-TZP, about 10vol% transformation and compressive residual stress areas were observed in the vicinity of the indentation, whereas tensile residual stress area was observed in the crack tip. Raman spectroscopy technique is useful for evaluating residual stress in ceramic artificial joints.
2006-09-15