焼結アルミナのX線応力測定(<小特集>X線材料強度小特集)

概要

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The X-ray diffraction method was used to measure the residual stress in the surface layer of sintered alumina finished under various conditions. X-ray elastic constants were determined for the diffraction lines of (1. 0. 10) plane and (220) plane obtained by using CrKα radiation. Those values were nearly identical for the as-fired surface,ground surface and lapped surface. The measured residual stresses were all compressive for various surfaces. The residual stress was the maximum compression of about -140 MPa for the surface ground with #300-diamond wheel. The surfaces finished by #600-diamond grinding and lapping were about -90 MPa. The residual stress measured on the fracture surface was small compression. Both the full width at the half maximum of diffraction profiles and the feature of X-ray microbeam diffraction patterns changed depending on the amount of plastic deformation associated with surface finishing and fracture processes.
社団法人日本材料学会の論文
1986-07-15