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Date of Publication:2005-01-01

Journal:硅酸盐学报

Issue:5

Page Number:559-563

ISSN No.:0454-5648

Abstract:The corrosion-resistance performance is one essential factor to determine the biocompatibility of metal implants. The corrosion and nickel-releasing may appear in body environment for the implants made by biomedical 316 L stainless steel after implanted. Diamond-like carbon films were synthesized from methane on biomedical stainless steel by use of the hybrid plasma source ion implantation (PSII) and plasma enhanced chemical vapor deposition (PECVD) technologies, through twinned microwave electron cyclotron resonance (ECR) plasma source enhanced ion implantation system in order to improve the corrosion resistance in simulated body fluid. The observation of scanning electron microscopy (SEM) and atomic force microscopy (AFM) photographs shows that diamond-like carbon films consisting of nano-particles are continuous and smooth. The results of electrochemical corrosion tests indicate that diamond-like carbon films prepared by the hybrid PSII and PECVD technologies have a better corrosion-resistance performance compared with biomedical 316 L stainless steel. The free corrosion potential in Troyde's simulated body fluid of (37 ± 1)°C is 120 mV and the breakdown potential is more than 1.9 V. The thermodynamic stability and corrosion performance is prior to that of the sample coated by PECVD.

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