The effects of particle pollution on the mechanical behaviour of multilayered systems

Poulingue, Marc; Ignat, M.; Dijon, Jean

doi:10.1016/s0040-6090(99)00137-6

Cited by 19 publications

(7 citation statements)

References 10 publications

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“…13, measured by BenAmor et al [78], suggest that untreated PET provides the highest coating crack onset strain, and various cold plasma treatments decrease this value. An interesting study, where calibrated particles were purposely introduced at the coating/substrate interface, confirmed the detrimental effect of stress concentrations on coating strength [189]. [180].…”

Section: Failure Initiation and Coating Strengthmentioning

confidence: 87%

Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

472

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: Failure Initiation and Coating Strengthmentioning

confidence: 87%

Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

472

341

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“…The asymmetrical nodules have worse boundaries compared to symmetrical nodules, so they should be more mechanically unstable. Poulingue et al have shown that nodules are mechanically weak and can be damaged by a pure mechanical approach [13]. The laser-induced damage of nodules can be partially explained from the fracture-based model.…”

Section: Discussion Of Thermomechanical Damage Of the Asymmetricalmentioning

confidence: 99%

Nanosecond laser-induced damage of nodular defects in dielectric multilayer mirrors [Invited]

et al. 2013

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Our recent studies on nodular damage in dielectric multilayer mirrors were first reviewed, and the main findings are taken as a foundation to further investigate the influence of seed absorptivity and asymmetrical boundary on the laser-induced damage of nodules. Experimental results showed that the seed absorptivity had a big influence on laser-induced damage thresholds (LIDTs) of the prepared nodules. A direct link between the cross-sectional |E|2 distributions and damage morphologies of nodules was found, which can perfectly explain the observed dependence of LIDTs on seed absorptivity. Another series of asymmetrical nodules were also studied in this work. The measured LIDTs of asymmetrical nodules were about 40%-70% lower than the LIDTs of the symmetrical nodules initiating from the same-sized SiO2 seeds. The weaker mechanical stability and the nonuniform |E|2 distributions are two main reasons for the lower laser damage resistance of the asymmetrical nodules.

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“…Here the mechanical behavior of nodules is first discussed. Poulingue et al designed an experiment to analyze the damage initiating from nodules through a purely mechanical approach [27]. The artificial nodules were obtained by dispersing diamond particles on polished aluminum substrates before the deposition of the layers.…”

Section: Experimental Studies Of Nodular Damagementioning

confidence: 99%

“…SEM micrograph showing the crack opening from nodular defects initiating from diamond seeds (reproduced from Poulingue et al[27]). …”

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confidence: 99%

Defect-related properties of optical coatings

Cheng¹,

Wang²

2014

Advanced Optical Technologies

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Defects in optical coatings are a major factor degrading their performance. Based on the nature of defects, we classified them into two categories: visible defects and non-visible defects. Visible defects result from the replication of substrate imperfections or particulates within the coatings by subsequent layers and can increase scattering loss, produce critical errors in extreme ultraviolet lithography, weaken mechanical and environmental stability, and reduce laser damage resistance. Non-visible defects mainly involve a decrease in laser damage resistance but typically have no influence on other properties of optical coatings. In the case of widely used HfO 2 /SiO 2 dielectric coatings, metallic Hf nano-clusters, off-stoichiometric HfO 2 nano-clusters, or areas of high-density electronic defects have been postulated as possible sources for non-visible defects. The emphasis of this review is devoted to discussing localized defect-driven laser-induced damage (LID) in optical coatings used for nanosecond-scale pulsed laser applications, but consideration is also given to other properties of optical coatings such as scattering, environmental stability, etc. The low densities and diverse properties of defects make the systematic study of LID initiating from localized defects time-consuming and very challenging. Experimental and theoretical studies of localized defect-driven LID using artificial defects whose properties can be well controlled are highlighted.

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The effects of particle pollution on the mechanical behaviour of multilayered systems

Cited by 19 publications

References 10 publications

Durability of nanosized oxygen-barrier coatings on polymers

Durability of nanosized oxygen-barrier coatings on polymers

Nanosecond laser-induced damage of nodular defects in dielectric multilayer mirrors [Invited]

Defect-related properties of optical coatings

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