Spiral and curved periodic crack patterns in sol-gel films |
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Authors: | M Sendova K Willis |
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Institution: | (1) Division of Natural Sciences, New College of Florida, Sarasota, FL 34238, USA, US |
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Abstract: | Thin silicate sol-gel films with four different crack patterns were created reproducibly by controlling the film deposition
parameters. The crack geometry, periodicity, and amplitude were studied experimentally as a function of the film thickness,
curing time, and temperature. Direct evidence was found that the physical interplay between stress relief through film cracking
and stress relief through film warping results in sawtooth, spiral, closed loop, or straight line crack trajectories.
Received: 25 March 2002 / Accepted: 1 July 2002 / Published online: 17 December 2002
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ID="*"Corresponding author. Fax: +1-941-359-4396, Email: sendova@ncf.edu |
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Keywords: | PACS: 61 43 Er 62 20 Mk 68 35 Gy 68 37 -d |
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