Mechanical properties of and cracks and wrinkles in vacuum-deposited MgF2, carbon and baron coatings

Kinbara, Akira; Baba, Shigeru; Matuda, Namio; Takamisawa, K.

doi:10.1016/0040-6090(81)90470-3

Cited by 54 publications

(14 citation statements)

References 12 publications

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“…Hence, the nucleation and growth of individual blisters over initially de-bonded patches are found (e.g. described by [35,36] and others). Spontaneously buckling patterns of various dimensions and structures develop, depending on the internal stresses and film thickness.…”

Section: Resultsmentioning

confidence: 87%

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Mechanisms for self-assembling topography formation in low-temperature vacuum deposition of inorganic coatings on polymer surfaces

Lackner¹,

Waldhauser²,

Alamanou³

et al. 2010

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Functionalization of surfaces is an important task for nanotechnology to add specially designed physico-chemical properties to materials. Besides chemical modification of surfaces, physical adaptations gain increasing interest. Thus, understanding the influences of film deposition on surface topography formation is the basis for future developments. For physical or chemical vapour deposited (PVD, CVD) films, structure zone models were developed, clearly showing the influences of temperature and vapour energy and, thus, surface and bulk diffusion on film structures based on four different structure zones. Generally, similar zones are also found in PVD coatings on polymeric substrates; However, due to restrictions in coating temperatures due to the thermal resistance of most polymers, the coating temperature is restricted to mostly 50˚C, excluding thermal activation of at least surface diffusion of inorganic materials (metals and their nitrides, oxides, carbides, etc.) and resulting in columnar growth with dome-shaped column tops. Additionally, the high difference in mechanical properties between "stiff" inorganic coatings and "flexible" polymers implicates stress-induced growth phenomena, resulting in wrinkling, cracking and finally the formation of a superseding structure, depending on substrate and film materials and the vapour energy of the deposition method.

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Section: Resultsmentioning

confidence: 87%

“…a) Cross-section of portion of the film and substrate and b) topography of the film after releasing the biaxial stresses (after Ref 35). …”

mentioning

confidence: 99%

Mechanisms for self-assembling topography formation in low-temperature vacuum deposition of inorganic coatings on polymer surfaces

Lackner¹,

Waldhauser²,

Alamanou³

et al. 2010

Bulletin of the Polish Academy of Sciences: Technical Sciences

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show abstract

“…For comparison, Kinbara et al measured a coating loss angle of 3.5 to 5 × 10 −4 rad at 30 Hz on thermally evaporated MgF 2 thin films [49,50]. Such different values could be explained by the different frequency of their measurement, and possibly also by the different nature of their thin films, grown with a different technique.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Optical and mechanical properties of ion-beam-sputtered MgF$_2$ thin films for gravitational-wave interferometers

Granata,

Amato,

Bischi

et al. 2021

Preprint

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Brownian thermal noise associated with highly reflective coatings is a fundamental limit for several precision experiments, including gravitational-wave detectors. Research is currently ongoing to find coatings with low thermal noise that also fulfill strict optical requirements such as low absorption and scatter. We report on the optical and mechanical properties of ion-beam-sputtered magnesium fluoride thin films, and we discuss the application of such coatings in current and future gravitationalwave detectors.

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“…[14][15][16] Concerning the properties of two-dimensional (2D) configurations, the pattern formation dynamics is modeled by a phenomenological one related to the phase-ordering process 17) and observed for the related systems including film delamination. [18][19][20][21][22][23][24][25] Meanwhile, we have observed the reversible ordering of the stripe arrangement by compressive strain with a small hysteresis and the strong memory effect of the initial pattern. 26) The dynamic ex-postcontrollability of spontaneously formed nano-and micrometer patterns and the reversibility are promising properties for engineering applications such as nano-and micromechanical systems.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Strain-Induced Microwrinkle Pattern Dynamics with Memory Effect

Ohzono

Shimomura

2005

Jpn. J. Appl. Phys.

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We computationally investigate the compression-induced reversible stripe rearrangement process, which is experimentally observed for the spontaneously formed pattern of microwrinkles on a Pt-sputtered elastomer surface. We propose a rough model for the wrinkles in a small bending regime considering the pattern memory of the neutral state with the strength parameter s, which should be attributable to the degree of material flow during initial pattern formation. The original pattern recovers after a compressive perturbation within finite time periods above the specific value of s. The simulated stripe rearrangement process shows qualitative agreement with the experimental results. In particular, the hysteretic behavior is reproduced and discussed in relation to s.

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Mechanical properties of and cracks and wrinkles in vacuum-deposited MgF2, carbon and baron coatings

Cited by 54 publications

References 12 publications

Mechanisms for self-assembling topography formation in low-temperature vacuum deposition of inorganic coatings on polymer surfaces

Mechanisms for self-assembling topography formation in low-temperature vacuum deposition of inorganic coatings on polymer surfaces

Optical and mechanical properties of ion-beam-sputtered MgF$_2$ thin films for gravitational-wave interferometers

Simulation of Strain-Induced Microwrinkle Pattern Dynamics with Memory Effect

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