ハイドロキシアパタイトのX線応力測定と強度評価(X線材料強度小特集)

概要

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The sin^2ψ method of X-ray stress measurement was successfully applied to hipped hydroxy-apatite. The X-ray elastic constants of (072+352) diffraction by Mn-Kα radiation was determined experimentally. It is close to the value calculated from the elastic constants of single crystals on the basis of Kroner's model. The residual stress measured on the lapped and ground surface was tension, because micro-fracturing was predominant in the grinding process of hydroxyapatite. The bending fracture was started from the cluster of pores. The critical value of the stress intensity factor calculated from the bending strength and the size of the fracture origin was nearly equal to the fracture toughness determined by bending specimens with single-edge V-shaped sharp notch.
社団法人日本材料学会の論文
1994-07-15