An analysis of disorder in thin silicon oxide coatings

U. A. Handge; Y. Leterrier; J.-A. E. Må nson; I. M. Sokolov; A. Blumen

doi:10.1209/epl/i1999-00478-8

All issues

Volume 48 / No 3 (November I 1999)

Europhys. Lett., 48 3 (1999) 280-285

Abstract

Issue		Europhys. Lett. Volume 48, Number 3, November I 1999


Page(s)		280 - 285
Section		Condensed matter: structure, mechanical and thermal properties
DOI		https://doi.org/10.1209/epl/i1999-00478-8
Published online		01 September 2002

Europhys. Lett., 48 (3), pp. 280-285 (1999)

An analysis of disorder in thin silicon oxide coatings

U. A. Handge¹, Y. Leterrier², J.-A. E. Må nson², I. M. Sokolov¹ and A. Blumen¹

¹ Theoretical Polymer Physics, University of Freiburg - Hermann-Herder-Str. 3 D-79104 Freiburg i.Br., Germany
² Laboratoire de Technologie des Composites et Polymères (LTC ) École Polytechnique Fédérale de Lausanne (EPFL) - CH-1015 Lausanne, Switzerland

Received: 20 May 1999
Accepted: 7 September 1999

Abstract

We analyze theoretically and experimentally the influence of disorder in thin brittle coatings on their fragmentation kinetics. It turns out that in linear bond-network models the mean fragment length $\langle L\rangle$ scales with the applied strain ϵ, i.e. $\langle L\rangle \propto \epsilon^{-\alpha}$ , with α depending on the degree of disorder in the coating. Experimentally we monitor the fragmentation of thin silicon oxide coatings. The analysis of the fragmentation kinetics reveals that $\langle L\rangle \propto \epsilon^{-\alpha}$ is well fulfilled and that α ranges from 1/3 to 1/2, being in very good agreement with the theory.

PACS: 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 61.43.-j – Disordered solids / 81.40.Np – Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure

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