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Title: Scratch resistance of brittle thin films on compliant substrates
Authors: Wu, Linda Y. L.
Chen, Zhong
Chwa, Edmund
Tham, Otto
Keywords: DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films
Issue Date: 2008
Source: Chen, Z., Wu, L. Y. L., Chwa, E., & Tham, O. (2008). Scratch Resistance of Brittle Thin Films on Compliant Substrates. Materials Science and Engineering A, 493(1-2), 292-298.
Series/Report no.: Materials science and engineering a
Abstract: There has been intensive interest in studying the behavior of hard and brittle thin films on compliant substrates under scratch action. The examples include sol–gel protective coatings on plastic optical lenses, safe windows, and flexible electronic devices and displays. Hard ceramic coatings have been widely used to prolong the life of cutting tools and biomedical implants. In this work, the scratch resistance of sol–gel coatings with different amount of colloidal silica on polycarbonate substrates was tested by the pencil scratch test following the ISO 15184 standard. The scratch failure was found to be tensile trailing cracking in the coating and substrate gouging. The indentation hardness, elasticity modulus and fracture toughness of the coatings were determined and correlated to the observed pencil scratch hardness. Based on the analysis, the main factors to improve the scratch resistance are the elasticity modulus, thickness and fracture toughness of the coatings. General consideration for the improvement of scratch resistance of hard coatings on compliant substrates was also discussed.
DOI: 10.1016/j.msea.2007.07.099
Rights: © 2007 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Materials Science and Engineering A, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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