EFFECT OF TEST METHOD AND CRACK SIZE ON THE FRACTURE-TOUGHNESS OF A CHAIN-SILICATE GLASS CERAMIC

被引：27

作者：

BEALL, GH ^{[1
]}

CHYUNG, K ^{[1
]}

STEWART, RL ^{[1
]}

DONALDSON, KY ^{[1
]}

LEE, HL ^{[1
]}

BASKARAN, S ^{[1
]}

HASSELMAN, DPH ^{[1
]}

机构：

[1] VIRGINIA POLYTECH INST & STATE UNIV, DEPT MAT ENGN, BLACKSBURG, VA 24061 USA

来源：

JOURNAL OF MATERIALS SCIENCE | 1986年 / 21卷 / 07期

关键词：

FRACTURE MECHANICS - GLASS - Fracture;

D O I：

10.1007/BF01114280

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fracture toughness of a canasite glass-ceramic with a highly acicular, interlocked grain structure was measured by a number of different methods. The high values of fracture toughness were attributed to the combined mechanisms of crack-deflection and microcrack-toughening due to the stress-enhanced creation of microcracks caused by the residual stresses which arise from the thermal expansion anisotropy of the canasite monoclonic crystal structure. The combined effects of crack-deflection and microcrack-toughening can lead to the development of glass-ceramics with greatly improved resistance to crack propagation.

引用

页码：2365 / 2372

页数：8

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