Statistical Model of Coating Fragmentation Under Equibiaxial Load

Andersons, J.; Leterrier, Y.; Joffe, Roberts

doi:10.1080/10426919808935280

Cited by 5 publications

(2 citation statements)

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“…13) [78,105,114], of coating thickness [163,164,259], and of temperature [125,263] on coating adhesion. The fragmentation test usually operates in uniaxial tension; the application of equibiaxial tension was further investigated to provide additional information regarding coating failure mechanisms [165,271,272].…”

Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

467

341

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Research on silicon oxide thin films developed as gas-barrier protection for polymer-based components is reviewed, with attention paid to the relations between (i) coating defects, cohesive strength and internal stress state, and (ii) interfacial interactions and related adhesion to the substrate. The deposition process of the oxide from a vapor or a plasma phase leads in both cases to the formation of covalent bonds between the two materials, with high adhesion levels. The oxide coating contains nanoscopic defects and microscopic flaws, and their respective effect on the barrier performance and mechanical resistance of the coating is analyzed. Potential improvements are discussed, including the control of internal stresses in the coating during deposition. Controlled levels of compressive internal stresses in the coating are beneficial to both the barrier performance and the mechanical reliability of the coated polymer. An optimal coating thickness, with low oxygen permeation and high cohesive strength, is determined from experimental and theoretical analyses of the failure mechanisms of the coating under mechanical load. These investigations are found relevant to tailor the interactions and stress state in the interfacial region, in order to improve the reliability of the coating/substrate assembly. #

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Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

467

341

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“…The latter differs from the former only in that the crack propagation direction is random. No exact analytical results are available for fragment distribution under isotropic fragmentation, but several numerical simulations have been reported for area fragmentation scenario dealing with fragment area [19][20][21], crack length and crack spacing distributions [22], and the evolution of average fragment side length [14]. The fragmentation rates in both processes are equal for the same coating strength distribution Eq.…”

Section: Comparison With Isotropic Fragmentationmentioning

confidence: 98%