アルミノケイ酸,ホウ酸,リン酸塩系ガラスの組成と機械的性質の関係

概要

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Young's modulus, E, Vickers hardness, H_v, crack initiation load, L_c, and fracture toughness, K_c, of 30RO-10Al_2O_3-60SiO_2, B_2O_3, P_2O_5 (mol%) (RO: MgO, CaO, SrO, BaO) system glasses were measured and the compositional dependence of deformation and fracture behaviors was systematically evaluated. Vickers hardness H_v and E had similar dependence on composition. The relationship between E and H_v was found to be expressed by H_v = 0.07E. Fracture toughness K_c and L_c were in the order of Mg > Ca > Sr > Ba, depending upon the size of modifier ions, for all glasses with three different network formers. The result of the present study suggests that L_c very sensitively reflects the relationship between composition and fracture behavior of glasses.
社団法人日本セラミックス協会の論文
2002-12-01