β-窒化ケイ素単結晶のせん断変形特性の分子動力学法による研究(<特集>分子動力学シミュレーション)

概要

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The deformation properties of β-silicon nitride under shear loading are investigated by molecular dynamics simulation using a three body empirical potential.Two cases of shear deformation, {101~~-0}<0001>and{101~~-0}<12~~-10>are analyzed, which are reported as the slip system on the basis of experimental observation.The ideal shear strength of the β single crystal along these directions is somewhat smaller than the one of α-silicon nitride single crystal reported previously.Slip deformations take place in narrow bands, thickness of which are very thin.For the{101~~-0}<0001>case, itis almost equal to the distance between the nearest neighbor atoms and for the{101~~-0}<12~~-10>case about 0.4nm.
社団法人日本材料学会の論文
2000-03-15