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Applied surface science v.433, 2018년, pp.1158 - 1174   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Response of boride coating on the Ti-6Al-4V alloy to corrosion and fretting corrosion behavior in Ringer's solution for bio-implant application

Bose, Sivakumar (Academy of Scientific Innovative Research, CSIR Madras Complex, Chennai, 600113, India ) ; Pathak, Lokesh Chandra (Academy of Scientific Innovative Research, CSIR Madras Complex, Chennai, 600113, India ) ; Singh, Raghuvir (Academy of Scientific Innovative Research, CSIR Madras Complex, Chennai, 600113, India ) ;
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    Abstract Corrosion and fretting corrosion of boride coating on Ti-6Al-4V (TAV) are investigated in Ringer’s solution for bio-implant applications. Boride coatings are fabricated as a function of temperature (900–1100°C) and soaking time (1–5h). Coatings are characterized for phase evaluation, microstructural analysis, thickness and microhardness measurement. The coating contained TiB 2 and TiB whiskers as outermost and inner layers respectively. The increasing thickness of outer TiB 2 at a relatively higher boriding temperature and time impeded the TiB formation. A large microhardness value of ∼3248 Hv 15gf at the outermost surface ( 2 layer. Anodic polarization and electrochemical impedance spectroscopy (EIS) studies reveal improvement in the corrosion resistance of coating produced at increased temperature and time of boriding, yet remained lower than the resistance of bare TAV alloy. The formation of B 2 O 3 and absence of Al 2 O 3 on the surface, as investigated by X-ray photoelectron spectroscopy (XPS), are attributed to an inferior corrosion resistance of the borided TAV. The increase in corrosion resistance with the TiB 2 coating thickness is attributed to thickening of the inner passive film formed on borided TAV. A large decrease in fretting damage after boride coating is due to the decline in a synergistic parameter. Highlights Corrosion and fretting corrosion of borided Ti6Al4V are studied in Ringers solution. B 2 O 3 dominance and Al 2 O 3 depletion from passive film reduced corrosion resistance. Increase in inner oxide thickness and TiB 2 coating increased the film resistance. Boriding improved fretting corrosion resistance by shrinking synergistic parameter. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Titanium alloy .   Boride coatings .   Corrosion .   EIS .   XPS .   Fretting corrosion.  

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