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Vol.42, No.4, 351 ~ 357, 2004
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| Title |
| A Study on the Electrochemical Properties of Diamond-Like Carbon Films Deposited on STS 316L for Artificial Hip Joints |
| 김호건 Kim Ho Geon , 안승호 An Seung Ho , 김정구 Kim Jeong Gu , 박세준 Park Se Jun , 이광렬 Lee Gwang Lyeol |
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| Abstract |
| Diamond-like carbon (DLC) films have several advantages in applications such as high hardness, chemical inertness, low friction and electrical insulation. Furthermore, DLC-coated STS 316L films have been reported to have a good biocompatibility, such as the absence of inflammatory response. Thus, corrosion resistance is the first consideration for the biomaterials to be used in the body. DLC films have been deposited onto substrates of STB 316L for artificial hip joints using r.f PACVD (plasma-assisted chemical vapor deposition) with C_(6)H_(6) and mixture of C_(6)H_(6) and SiH_(4) as the process gases. Three kinds of DLC-coated films were prepared as a function of diverse bias voltage and Si incorporation. Corrosion behavior of DLC films was investigated by electrochemical techniques (potentiodynamic polarization test and electrochemical impedance spectroscopy) and surface analyses (atomic force microscopy and scanning electron microscopy). The electrolyte used in his test was a 0.89％NaCl solution of pH 7.4 at temperature 37℃. Electrochemical measurements showed that DLC films with higher bias voltage and Si incorporation could improve corrosion resistance in the simulated body fluid environment. (Received December 5, 2003) |
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| Key Words |
| Hip joint, DLC, Porosity, SEM, AFM, EIS |
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