Scratch resistance of brittle thin films on compliant substrates

Chen, Zhong; Wu, Linda; Chwa, Edmund; Tham, Otto

doi:10.1016/j.msea.2007.07.099

Cited by 68 publications

(41 citation statements)

References 37 publications

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“…23,24 Figure 4c shows the variation of the ratio of H/E and H The scratch resistance is a good indicator of not only adhesion strength between the coating and the substrate but also the load bearing capacity, fracture toughness and abradability of a coating. [25][26][27] A commercial scratch tester was used to estimate the adhesion strength and Fig. 5a, and the corresponding SEM images of scratch tracks are displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique

Fan

2013

Materials Science and Technology

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Four kinds of nanocrystalline Mo(Si 12x Al x ) 2 coatings with differing Al contents are prepared onto a Ti-6Al-4V substrates by a double cathode glow discharge apparatus. The microstructural features of the deposited coatings were characterised by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. These coatings are composed of the equiaxed C40-MoSi 2 grains with the average grain size of ,5 nm. Nano-indentation measurements indicated that the hardness H, elastic modulus E and the H/E or H 3 /E 2 ratio of the nanocrystalline Mo(Si 12x Al x ) 2 coatings slightly increase with the increase in Al content. The tribological behaviour of the nanocrystalline Mo(Si 12x Al x ) 2 coating sliding against a ZrO 2 ceramic ball at room temperature has been compared using a ball-on-disc type tribometer under unlubricated conditions. Experimental results showed that the specific wear rates of the nanocrystalline Mo(Si 12x Al x ) 2 coatings decrease with increasing Al content and are dramatically reduced by more than 1-2 orders of magnitude over the uncoated Ti-6A1-4V. The enhancement of wear resistance of the nanocrystalline Mo(Si 12x Al x ) 2 coatings by Al additions is correlated with the increased mechanical properties and the forming oxide layer by tribochemical reactions.

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Section: Resultsmentioning

confidence: 99%

Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique

Fan

2013

Materials Science and Technology

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“…It is well known that filler additivation within the network increases both coating hardness and mechanical resistance. Colloidal silica is the most common used additive in sol-gel process [9,13,50,61,62]. First, Lionti et al show that samples prepared with different colloidal silica amount display slight different behavior under scratch solicitation with a Rockwell indenter (200 lm radius): the first crack is observed at higher force (1.4 N) when colloidal silica amount is lower (10 wt%) compared to 1.1 N with the higher colloidal silica amount (50 wt%) (Fig.…”

Section: Filler Additivationmentioning

confidence: 99%

Mechanical properties of sol–gel coatings on polycarbonate: a review

Bail

Benayoun

Toury

2015

J Sol-Gel Sci Technol

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Organic/inorganic hybrid coatings prepared via the sol-gel process have received lot of interests during the early twenty-first century. Devices obtained thanks to this low-temperature route display a large panel of bulk and surface properties that can be modulated according to the target. Moreover, this versatility enables to offer solutions in various domains and industrial applications such as microelectronics, optic, aeronautic, automotive, health. When the aimed application required polymer as substrate, the use of sol-gel process takes its full interest as soft chemistry. This review is dedicated to mechanical properties improvement of a common polymer substrate, e.g., polycarbonate, when a transparent sol-gel coating recovered it. Graphical Abstract

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“…Indeed, the hardness value of each paint layer was determined to be between the first pencil hardness creating a scratch in the paint, and the previous pencil hardness which did not affect the surface of the paint. During manufacture, the ISO15184 standard for pencil scratch tests, and established standards for film hardness assessment of soft coatings such as paint and varnishes, was followed in accordance with Atkins [26] and Chen [27].…”

Section: Scratch Testingmentioning

confidence: 99%

On the study of oil paint adhesion on optically transparent glass: Conservation of reverse paintings on glass

Bayle

Waugh

Colston

et al. 2015

Applied Surface Science

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Reverse painting on glass is a technique which consists of applying a cold paint layer on the reverseside of glass. The main challenge facing these artworks is the fragile adhesion of the pictorial layera simple movement can modify the appearance of the painting. This paper details a study into the adhesion parameters of pigments on glass and the comparison between different pigments. The relationships between the binder (linseed oil) with pigments and the glass with or without the use of an adhesive are studied. Physical analyses by surface characterisation have been carried out to better understand the influence of the pigment. The use of a sessile drop device, optical microscopy, scanning electron microscopy (SEM), a surface 3D profiler and a pencil hardness scratch tester were necessary to establish a comparison of the pictorial layer adhesion. A comparison of the effect of two adhesives; namely ox gall and gum arabic, has shown that the adhesion is not only linked to the physical parameters but that possible chemical reactions can influence the results. Finally, a treatment based on humidity-extreme storage has shown the weakness of some pictorial layers.

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Scratch resistance of brittle thin films on compliant substrates

Cited by 68 publications

References 37 publications

Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique

Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique

Mechanical properties of sol–gel coatings on polycarbonate: a review

On the study of oil paint adhesion on optically transparent glass: Conservation of reverse paintings on glass

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Scratch resistance of brittle thin films on compliant substrates

Cited by 68 publications

References 37 publications

Role of Al additions in wear control of nanocrystalline Mo(Si1−xAlx)2 coatings prepared by double cathode glow discharge technique

Role of Al additions in wear control of nanocrystalline Mo(Si1−xAlx)2 coatings prepared by double cathode glow discharge technique

Mechanical properties of sol–gel coatings on polycarbonate: a review

On the study of oil paint adhesion on optically transparent glass: Conservation of reverse paintings on glass

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Product

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Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique

Role of Al additions in wear control of nanocrystalline Mo(Si_1−xAl_x)₂ coatings prepared by double cathode glow discharge technique