Biomedical Ti alloys are prone to undergo degradation due to the combined effect of wear and corrosion. To overcome these problems, surface modification techniques are being used. In this paper, the biomedical Ti alloy Ti-13Nb-13Zr was plasma sprayed with nanostructured Al2O3-13 wt%TiO2, yttria stabilized zirconia powders and bilayer containing alternate layers of the two coatings to improve the corrosion resistance and microhardness of the substrate. The plasma sprayed coatings were characterized by X-ray diffraction, scanning electron microscopy and Raman spectroscopy. The microstructure, microhardness and surface roughness of the coatings were investigated. The corrosion resistance of the coatings was studied in simulated body conditions. The results show improved corrosion resistance for the bilayered coating compared to the individual plasma sprayed coatings on biomedical Ti-13Nb-13Zr alloy substrate. © 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Sathish A-S

VIT Business School

Chennai Campus

Geetha M

Department of Control and Automation

School of Electrical Engineering

Vellore Campus

Aruna S.T

Balaji N

Rajam K.S

Asokamani R.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Ceramics International

ACS Biomaterials Science & Engineering

Enhanced Tribocorrosion Resistance of Hard Ceramic Coated Ti-6Al-4V Alloy for Hip Implant Application: In-Vitro Simulation Study

This paper deals with the investigation on the microstructure and wear behavior of uncoated, Al2O3-13 wt% TiO2, and WC-12 wt% Co-coated drill bits intended for drilling reinforced concrete. Atmospheric plasma spraying technique was employed to fabricate the above coatings on high speed steel drill bits. The circularity measurements of the drilled holes were carried out using MATLAB. The holes drilled using WC-12 wt% Co-coated drill bit showed a better circularity depicting enhanced wear resistance as compared to that of the uncoated and Al2O3-13 wt% TiO2 drill bits. The improvement in the wear resistance of WC-12 wt% Co-coated drill bit is attributed to its higher hardness and lower porosity. Thrust force was observed to be lower for WC-12 wt% Co-coated drill bit depicting less amount of wear. This study suggests that WC-12 wt% Co-coated drill bits can be a potential candidate for drilling reinforced concrete. © 2018 The American Ceramic Society

International Journal of Applied Ceramic Technology

Drilling performances and wear characteristics of coated drill bits during drilling reinforced concrete

Synthesized composite powders (ZrO 2 /TiO 2 , SiO 2 /TiO 2 , and SiO 2 /ZrO 2 ) were successfully deposited on Ti–6Al–4V by electrophoretic deposition method (EPD) to improve its electrochemical characteristics for better biomedical applications. In the present investigation, the three composite powders were prepared by sol–gel synthesis and its phase purity was analyzed by Powder X-ray diffraction (XRD) method. Further, the performance of the deposited coatings was assessed by scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDAX), scratch resistance test. The electrochemical properties of the composite coatings were analyzed by Potentiodynamic (Tafel) polarization and electrochemical impedance spectroscopy (EIS) studies. From the results, we observed that the corrosion resistance behavior of the different composite coated metallic substrate exhibited divergent corrosion resistance nature than blank Ti–6Al–4V. Of all these coatings on Ti–6Al–4V, the composite made up of, ZrO 2 /TiO 2 has pronounced corrosion resistance behavior in Ringer's solution when compared to others. This behavior is due to the presence of strong adherent coating owing to the existence of uniform deposition on Ti–6Al–4V. © 2017 The Ceramic Society of Japan and the Korean Ceramic Society

Fulltext

Journal of Asian Ceramic Societies

Improved corrosion resistant and mechanical behavior of distinct composite coatings (silica/titania/zirconia) on Ti–6Al–4V deposited by EPD

ZrO2, Al2O3, ZrO2/Al2O3 and Al2O3/ZrO2 coatings were fabricated on low carbon steel using atmospheric plasma spraying technique. The microstructure and phase composition of the as-sprayed coatings were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The polarization test, salt spray test and immersion test were used to investigate the corrosion behavior of the coatings in 3.5% NaCl solution. The results suggested that the bilayered Al2O3/ZrO2 coating exhibits superior corrosion resistance when compared with the other coatings. This is ascribed to the presence of very few interconnected pores and stable phases in the coating. © 2016 The Nonferrous Metals Society of China

Transactions of Nonferrous Metals Society of China

Comparative study on corrosion behavior of plasma sprayed Al2O3, ZrO2, Al2O3/ZrO2 and ZrO2/Al2O3 coatings

International Journal of Nanomedicine

Wear studies on plasma-sprayed Al2O3 and 8mole% of Yttrium-stabilized ZrO2 composite coating on biomedical Ti-6Al-4V alloy for orthopedic joint application

The field of biomaterials has become a vital area, as these materials can enhance the quality and longevity of human life and the science and technology associated with this field has now led to multi-million dollar business. The paper focuses its attention mainly on titanium-based alloys, even though there exists biomaterials made up of ceramics, polymers and composite materials. The paper discusses the biomechanical compatibility of many metallic materials and it brings out the overall superiority of Ti based alloys, even though it is costlier. As it is well known that a good biomaterial should possess the fundamental properties such as better mechanical and biological compatibility and enhanced wear and corrosion resistance in biological environment, the paper discusses the influence of alloy chemistry, thermomechanical processing and surface condition on these properties. In addition, this paper also discusses in detail the various surface modification techniques to achieve superior biocompatibility, higher wear and corrosion resistance. Overall, an attempt has been made to bring out the current scenario of Ti based materials for biomedical applications.

Progress in Materials Science

Ti based biomaterials, the ultimate choice for orthopaedic implants – A review

Surface and Coatings Technology

Thermal cycling behavior of La2Ce2O7/8YSZ double-ceramic-layer thermal barrier coatings prepared by atmospheric plasma spraying

Fabrication and properties of plasma-sprayed Al2O3/TiO2 composite coatings: A role of nano-sized TiO2 addition

Wear

Wear and corrosion behaviour of various surface treated medical grade titanium alloy in bio-simulated environment

Applied Surface Science

Influences of laser remelting on microstructure of nanostructured Al2O3–13wt.% TiO2 coatings fabricated by plasma spraying

Studies on plasma sprayed bi-layered ceramic coating on bio-medical Ti–13Nb–13Zr alloy

Journal	Data powered by TypesetCeramics International
Publisher	Data powered by TypesetElsevier BV
ISSN	0272-8842
Open Access	0