Highly adherent tungsten-containing diamond-like carbon (W-DLC) coating on a NiTi shape memory alloy under 10% tensile strain

Takanori Takeno; Hiroyuki Shiota; Toshifumi Sugawara; Hiroyuki Miki; Toshiyuki Takagi

doi:10.1016/j.diamond.2008.09.012

Highly adherent tungsten-containing diamond-like carbon (W-DLC) coating on a NiTi shape memory alloy under 10% tensile strain

Takanori Takeno, Hiroyuki Shiota, Toshifumi Sugawara, Hiroyuki Miki, Toshiyuki Takagi

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Highly adherent tungsten-containing diamond-like carbon coating (W-DLC) was investigated. Two types of W-DLC coating are deposited onto a mirror-polished SMA substrate by PECVD and co-sputtering of the tungsten metal target. A DLC coating is also investigated for comparison. Uniaxial tensile tests are performed for these three types of coating and the peeled-off area is estimated visually. The best adherence was achieved with a WD40 film and the peeled-off area was estimated to be ~ 1% even after 10% tensile strain was applied to the coating. To evaluate the adhesive strength, scratching tests were carried out and, of the three, WD40 showed the highest adhesive strength. The higher adhesive strength of the DLC coating results from a reduction in internal stress and a lowering of coating hardness by the introduction of additional elements.

Original language	English
Pages (from-to)	403-406
Number of pages	4
Journal	Diamond and Related Materials
Volume	18
Issue number	2-3
DOIs	https://doi.org/10.1016/j.diamond.2008.09.012
Publication status	Published - 2009 Feb

Keywords

DLC
High adhesive strength
Shape memory alloy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Chemistry(all)
Mechanical Engineering
Materials Chemistry
Electrical and Electronic Engineering

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abstract = "Highly adherent tungsten-containing diamond-like carbon coating (W-DLC) was investigated. Two types of W-DLC coating are deposited onto a mirror-polished SMA substrate by PECVD and co-sputtering of the tungsten metal target. A DLC coating is also investigated for comparison. Uniaxial tensile tests are performed for these three types of coating and the peeled-off area is estimated visually. The best adherence was achieved with a WD40 film and the peeled-off area was estimated to be ~ 1% even after 10% tensile strain was applied to the coating. To evaluate the adhesive strength, scratching tests were carried out and, of the three, WD40 showed the highest adhesive strength. The higher adhesive strength of the DLC coating results from a reduction in internal stress and a lowering of coating hardness by the introduction of additional elements.",

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AU - Shiota, Hiroyuki

AU - Sugawara, Toshifumi

AU - Miki, Hiroyuki

AU - Takagi, Toshiyuki

PY - 2009/2

Y1 - 2009/2

N2 - Highly adherent tungsten-containing diamond-like carbon coating (W-DLC) was investigated. Two types of W-DLC coating are deposited onto a mirror-polished SMA substrate by PECVD and co-sputtering of the tungsten metal target. A DLC coating is also investigated for comparison. Uniaxial tensile tests are performed for these three types of coating and the peeled-off area is estimated visually. The best adherence was achieved with a WD40 film and the peeled-off area was estimated to be ~ 1% even after 10% tensile strain was applied to the coating. To evaluate the adhesive strength, scratching tests were carried out and, of the three, WD40 showed the highest adhesive strength. The higher adhesive strength of the DLC coating results from a reduction in internal stress and a lowering of coating hardness by the introduction of additional elements.

AB - Highly adherent tungsten-containing diamond-like carbon coating (W-DLC) was investigated. Two types of W-DLC coating are deposited onto a mirror-polished SMA substrate by PECVD and co-sputtering of the tungsten metal target. A DLC coating is also investigated for comparison. Uniaxial tensile tests are performed for these three types of coating and the peeled-off area is estimated visually. The best adherence was achieved with a WD40 film and the peeled-off area was estimated to be ~ 1% even after 10% tensile strain was applied to the coating. To evaluate the adhesive strength, scratching tests were carried out and, of the three, WD40 showed the highest adhesive strength. The higher adhesive strength of the DLC coating results from a reduction in internal stress and a lowering of coating hardness by the introduction of additional elements.

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KW - Shape memory alloy

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Highly adherent tungsten-containing diamond-like carbon (W-DLC) coating on a NiTi shape memory alloy under 10% tensile strain

Abstract

Keywords

ASJC Scopus subject areas

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