微細クラックを含むガラスマトリックス複合体の弾性率(<小特集>セラミック材料小特集)

概要

論文の詳細を見る
Four series of glass matrix/glass particle composites where the thermal expansion coefficient of the matrix is similar to or higher than that of the dispersed particles were prepared by hot-pressing technique. Optical microscopy indicated that, in the case of larger thermal expansion mismatch between particle and matrix, microcracks were formed radially around particles during cooling of the composite body from its fabrication temperature. The Young's modulus for each composite was determined from the load-deflection curve of a rectangular bar specimen tested in three-point bending. Using a two-dimensional model, a theoretical analysis was made of the elastic modulus of two-phase, particulate composites containing microcracks. This analysis enabled the overall Young's modulus of such composites to be correlated with the size and density of the microcracks. The Young's modulus behavior of the prepared composites could be well explained on the basis of the analysis, and the size and density of the microcracks existing in the composites were reasonably estimated.
社団法人日本材料学会の論文
1982-10-15