CRACKING OF BRITTLE FILMS ON ELASTIC SUBSTRATES

被引：141

作者：

THOULESS, MD

OLSSON, E

GUPTA, A

机构：

[1] IBM Research Division, T. J. Watson Research Center, Yorktown Heights

来源：

ACTA METALLURGICA ET MATERIALIA | 1992年 / 40卷 / 06期

关键词：

D O I：

10.1016/0956-7151(92)90429-I

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An analysis is presented that relates the crack spacing in a brittle film on an elastic substrate to the stress in the film, its thickness and fracture toughness. This analysis differs from an earlier one presented by one of the authors in that it considers the effect of a sequential, rather than a concerted, propagation of cracks, and predicts a larger crack spacing. The validity of the present analysis was confirmed by experimental results from a model system consisting of epitaxial PrBa2Cu3O7-x films on SrTiO3 substrates. The experimentally observed relationship between the crack spacing and the film thickness was in excellent agreement with the theory.

引用

页码：1287 / 1292

页数：6

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