Crack formation of ceramic thin film on polymer substrate

Masaki Omiya, K. Kishimoto

Research output: Contribution to journalArticle

Abstract

The aim of this paper is to investigate the effect of ultra-violet (UV) ray irradiation on the crack formation of brittle ceramic coating on polymer substrate. It is well known that ultra-violet ray irradiation degrades the mechanical properties of polymer and polymer-based coating films. We carried out the tensile tests of PET/ITO film specimen after UV irradiation under the microscope and observed the crack formation on ITO surface. Also, we carried out nano-indentation tests of PET substrate after removing ITO layer to characterize the change of the mechanical properties near the interface between PET and ITO. The results show that the number of cracks vertical to loading direction and the rate of vertical crack formation decreased after UV irradiation. Hardness and Young's modulus of PET substrate increase due to the oxidation of PET after UV irradiation. To explain the relationship between the crack formation and mechanical property change, the energy release rates of the thin film channeling cracks are considered.

Original languageEnglish
Pages (from-to)307-310
Number of pages4
JournalKey Engineering Materials
Volume353-358
Issue numberPART 1
Publication statusPublished - 2007
Externally publishedYes

Fingerprint

Crack initiation
Polymers
Irradiation
Thin films
Substrates
Mechanical properties
Cracks
Ceramic coatings
Energy release rate
Nanoindentation
Microscopes
Elastic moduli
Hardness
Coatings
Oxidation
Ultraviolet Rays

Keywords

  • Ceramic
  • Channeling crack
  • Indentation
  • Polymer
  • Thin film
  • Ultra-violet ray

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

Cite this

Crack formation of ceramic thin film on polymer substrate. / Omiya, Masaki; Kishimoto, K.

In: Key Engineering Materials, Vol. 353-358, No. PART 1, 2007, p. 307-310.

Research output: Contribution to journalArticle

Omiya, M & Kishimoto, K 2007, 'Crack formation of ceramic thin film on polymer substrate', Key Engineering Materials, vol. 353-358, no. PART 1, pp. 307-310.
Omiya, Masaki ; Kishimoto, K. / Crack formation of ceramic thin film on polymer substrate. In: Key Engineering Materials. 2007 ; Vol. 353-358, No. PART 1. pp. 307-310.
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