ジルコニア・アルミナ複合セラミックスの3軸残留相応力のX線測定

概要

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The X-ray diffraction method was used to measure the residual stress in composite ceramics of zirconia mixed with various volume fractions of alumina. The triaxial state of the residual stress in each phase was determined from the X-ray diffractions of Al_2O_3 (146) by Cu-Kα radiation and of ZrO_2 (133) by Cr-Kα radiation. In as-sintered materials, the residual stress in the alumina phase was compression, and decreased linearly with the alumina volume fraction V_f. On the other hand, the tensile residual stress was observed in the zirconia phase, and increased linearly with V_f. Those residual stresses were due to the mismatch of the coefficient of thermal espansion. The theoretical prediction based on Eshelby's inclusion mechanics agreed well with the experimental results.
社団法人日本材料学会の論文
1992-05-15