Vacuum crack growth in alkali silicate glasses

被引：6

作者：

Waurischk, T. ^{[1
]}

Reinsch, S. ^{[1
]}

Rouxel, T. ^{[2
]}

Behrens, H. ^{[3
]}

Deubener, J. ^{[4
]}

Mueller, R. ^{[1
]}

机构：

[1] Bundesanstalt Mat Forsch & Prufung BAM, D-12489 Berlin, Germany

[2] Univ Rennes 1, IUF, UMR CNRS 6251, Inst Phys Rennes, F-35042 Rennes, France

[3] Leibniz Univ Hannover, Inst Mineral, D-30167 Hannover, Germany

[4] Tech Univ Clausthal, Inst Nonmetall Mat, D-38678 Clausthal Zellerfeld, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2021年 / 572卷

关键词：

Silicate glass; Brittle fracture; Crack growth; Calculated intrinsic fracture toughness; ATOMIC-FORCE MICROSCOPY; FRACTURE-TOUGHNESS; STRESS-CORROSION; ELASTIC PROPERTIES; STATIC FATIGUE; WATER; PROPAGATION; STRENGTH; DIFFUSION; KINETICS;

D O I：

10.1016/j.jnoncrysol.2021.121094

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Crack growth velocity in alkali silicate glasses was measured in vacuum across 10 orders of magnitude with double cantilever beam technique. Measured and literature crack growth data were compared with calculated intrinsic fracture toughness data obtained from Young ' s moduli and the theoretical fracture surface energy estimated from chemical bond energies. Data analysis reveals significant deviations from this intrinsic brittle fracture behavior. These deviations do not follow simple compositional trends. Two opposing processes may explain this finding: a decrease in the apparent fracture surface energy due to stress-induced chemical changes at the crack tip and its increase due to energy dissipation during fracture.

引用

页数：8

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