Evaluation of Fatigue Strength of Tungsten-containing DLC Coating on NiTi Shape Memory Alloy
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- SHIOTA Hiroyuki
- 東北大学工学研究科
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- TAKENO Takanori
- 東北大学国際高等融合領域研究所
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- MIKI Hiroyuki
- Institute of Fluid Science, Tohoku University
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- TAKAGI Toshiyuki
- Institute of Fluid Science, Tohoku University
Bibliographic Information
- Other Title
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- 繰り返し曲げ試験による形状記憶合金上に作製したタングステンを含むDLC膜の疲労評価
- クリカエシ マゲ シケン ニ ヨル ケイジョウ キオク ゴウキン ジョウ ニ サクセイ シタ タングステン オ フクム DLC マク ノ ヒロウ ヒョウカ
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Abstract
NiTi shape memory alloy (SMA) is expected as medical devises utilizing the shape memory effect. However, release of the Ni ions from the SMA into the human body is one of the significant issues to be solved because Ni ions cause the allergetic reaction. Diamond-like carbon (DLC) coating is one of the promising materials that can prevent the release of such ions. To use DLC as coating materials onto NiTi, fatigue strength to endure cyclic bending of the SMA substrate is required. Although conventional DLC coating is very brittle and show week adhesive strength to metallic substrate, the addition of metal into a DLC matrix is one of the possibility to get good adhesiveness and bending flexibility. In this study, the fatigue strength of tungsten-containing DLC coating on SMA plate was investigated. DLC was deposited on a SMA plate by radio-frequency chemical vapor deposition (RFCVD) and also co-sputtering of metal target. The fatigue strength of DLC has been characterized by applying 1% cyclic bending strain. The surfaces of the coatings were observed after bending test using a scanning electron microscope (SEM), a optical microscope and an atomic force microscope (AFM). In the result, no cracks and interface delamination were obsearved up to 10^5 cycles.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 76 (766), 745-751, 2010
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390282679455099008
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- NII Article ID
- 110007642521
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- NII Book ID
- AN0018742X
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- ISSN
- 18848338
- 03875008
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- NDL BIB ID
- 10757113
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed