Improvement of adhesion of DLC coating on nitinol substrate by hybrid ion beam deposition technique |
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Authors: | Ritwik Kumar Roy Jin Woo Yi Kwang-Ryeol Lee |
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Affiliation: | a Future Technology Research Laboratory, Korea Institute of Science and Technology, Seoul 130-650, Republic of Korea b J&L Tech. Co, Ltd, Shiwha Industrial Complex, Shiwha-Shi, Kyeongki-Do 429-936, Republic of Korea |
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Abstract: | Diamond-like carbon (DLC) films were prepared for a protective coating on nitinol substrate by hybrid ion beam deposition technique with an acetelene as a source of hydrocarbon ions. An amorphous silicon (a-Si) interlayer was deposited on the substrates to ensure better adhesion of the DLC films followed by Ar ion beam treatment. The film thickness increased with increase in ion gun anode voltage. The residual stresses in the DLC films decreased with increase in ion gun anode voltage and film thickness, while the stress values were independent of the radio frequency (RF) bias voltage. The adhesion of the DLC film was improved by surface treatment with argon ion beam for longer time and by increasing the thickness of a-Si interlayer. |
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Keywords: | Hybrid ion beam deposition DLC Adhesion Nitinol |
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