Optical interferometry diagnostics in laser-induced spallation on film–substrate systems

Zhou, Ming; Zhang, Y.K; Liu, Cai; Shen, Zhonghua; Zhang, X.R; Zhang, S.Y

doi:10.1016/s0257-8972(02)00773-9

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The reflected light from the rear free surface is collected by a lens (7) and a drilled mirror (8) to be focused (9) on an optical fibre (10) for transfer to the VISAR (2) from the Valyn Company. This tool is based on a Michelson type interferometer [26] and allows velocity measurements from 50 m s −1 to several thousands of m s −1 with a time precision in the range 0.5-1 ns (according to the velocity range).…”

Section: Methodsmentioning

confidence: 99%

“…The reflection of this wave creates tensile stresses inside the target and can debond the coating. A failure diagnosis can be performed using the measurement of the coating rear free surface velocity (RFSV) with a velocity inferometer system for any reflectors (VISAR) interferometer [7,8]. This technique has been emerging of late, giving good results, for example, for thermal spraying coating, [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physical approach to adhesion testing using laser-driven shock waves

Bolis¹,

Berthe²,

Boustie³

et al. 2007

J. Phys. D: Appl. Phys.

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This paper deals with an adhesion test of coatings using laser-driven shock waves. Physical aspects concerning laser–matter interaction, shock wave propagation and interface fracture strength are described. This comprehensive approach using two numerical codes (HUGO and SHYLAC) allows the determination of mechanisms responsible for coating debonding and a quantitative evaluation of fracture strength. From this description, a coating test protocol is also designed. To diagnose coating debonding, it is based on the analysis of experimental rear free surface velocity profiles measured by velocity interferometer system for any reflectors (VISAR). Ni electrolytic coating (70–90 µm) deposited on a Cu substrate (120–190 µm) is used for the experimental validation of the test. The fracture strength is 1.49 ± 0.01 GPa for a laser pulse duration of 10 ns at 1.064 µm.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physical approach to adhesion testing using laser-driven shock waves

Bolis¹,

Berthe²,

Boustie³

et al. 2007

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The oscilloscope must be synchronized with the Nd:YAG laser Q-switch in order to precisely trigger the data collection for complete capture of the interested stress-wave signal. The typical displacement diagnostic laser is a stable linearly polarized solid-state diode but other high-quality linearly polarized laser sources such as He–Ne [ 84 ] or argon ion [ 85 ] have been successful. When setting up the laser interferometer, alignment of the diagnostic laser and the pulse laser on the sample is crucial for accurate displacement measurements.…”

Section: Measurement Principlesmentioning

confidence: 99%

Evolution of the Laser-Induced Spallation Technique in Film Adhesion Measurement

Ehsani

Boyd

Wang

et al. 2021

Applied Mechanics Reviews

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Laser-induced spallation is a process in which a stress wave generated from a rapid, high-energy laser pulse initiates the ejection of surface material opposite the surface of laser impingement. Through knowledge of the stress wave amplitude that causes film separation, the adhesion and interfacial properties of a film-on-substrate system are determined. Some advantages of the laser spallation technique are the non-contact loading, development of large stresses (on the order of GPa) and high strain rates, up to 108 /s. The applicability to both relatively thick films, tens of microns, and thin films, tens of nm, make it a unique technique for a wide range of materials and applications. This review combines the available knowledge and experience in laser spallation, as a state-of-the-art measurement tool, in a comprehensive pedagogical publication for the first time. An historical review of adhesion measurement by the laser-induced spallation technique, from its inception in the 1970s through the present day, is provided. An overview of the technique together with the physics governing the laser-induced spallation process, including functions of the absorbing and confining materials, are also discussed. Special attention is given to applications of laser spallation as an adhesion quantification technique in metals, polymers, composites, ceramics, and biological films. A compendium of available experimental parameters is provided that summarizes key laser spallation experiments across these thin film materials. This review concludes with a future outlook for the laser spallation technique, which approaches its semicentennial anniversary.

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On the shock-based determination of the adhesive strength at a substrate-coating interface

Rességuier

2017

Journal of Adhesion Science and Technology

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Optical interferometry diagnostics in laser-induced spallation on film–substrate systems

Cited by 5 publications

References 13 publications

Physical approach to adhesion testing using laser-driven shock waves

Physical approach to adhesion testing using laser-driven shock waves

Evolution of the Laser-Induced Spallation Technique in Film Adhesion Measurement

On the shock-based determination of the adhesive strength at a substrate-coating interface

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