Magesh G

Department of Software and Systems Engineering

School of Information Technology and Engineering

Vellore Campus

Revathi A

Balla V.K

Das M

Manivasagam G.

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

Current advances in enhancement of wear and corrosion resistance of titanium alloys – a review

Materials Technology

Fulltext

International Journal of Nanomedicine

Tribological and corrosion behaviors of warm- and hot-rolled Ti-13Nb-13Zr alloys in simulated body fluid conditions

The relative wear resistance of three candidate coatings for titanium alloy-based orthopedic applications was compared using a reciprocating test method. Micrometer-sized powders of the following compositions were plasma sprayed onto Ti-6Al-4V (TAV) alloy: (i) Al2O3 (AO), (ii) 8mol% yttria stabilized zirconia (8YSZ) and (iii) Al2O3-40wt% 8YSZ (A4Z). Deposits were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and porosity measurements. In addition, microindentation hardness measurements and scratch-based adhesive/cohesive strength measurements were also performed. The composite coating (A4Z) had superior wear resistance. Wear track examination suggests two reasons for this improvement. First, the A4Z coating had improved cohesive strength between splats, and second, there was a phase transition toughening mechanism associated with tetragonal zirconia. Results of contact mechanics calculations support the experimental findings. © 2014 Elsevier B.V.

Wear

Wear studies on plasma sprayed Al2O3–40wt% 8YSZ composite ceramic coating on Ti–6Al–4V alloy used for biomedical applications

Metallurgical and Materials Transactions A

Effect of Texture and Grain Size on Bio-Corrosion Response of Ultrafine-Grained Titanium

Implants made out of Ti alloys often fail due to their lower wear and corrosion resistance. In order to obviate this problem, submicrometric diamond films were grown on Ti-13Nb-13Zr and Ti-23Nb-0.7Ta-2Zr-O (Gum metal) using hot filament chemical vapor deposition technique. Deposited films were characterized using XRD, Raman, SEM, AFM and nanointender. The electrochemical corrosion and reciprocatory wear behavior of the coated samples were evaluated in simulated body fluid. The results demonstrate that corrosion and wear properties of the diamond coated Gum metal are far superior than Ti-13Nb-13Zr alloy, due to the presence of beta phase in the former alloy. © 2012 Elsevier Ltd. All rights reserved.

Tribology International

Studies on corrosion and wear behavior of submicrometric diamond coated Ti alloys

This paper reports on the corrosion and scratch behavior of TiO 2 + 50%HAp nanoceramic coated Ti-13Nb-13Zr orthopedic implant alloy. An adherent thin coating was obtained using the electrophoretic deposition (EPD) technique at 30 V and sintering at 850 °C. The microstructure of the coated surfaces was characterized by optical microscopy, AFM, and SEM, and the composition of the coating was examined using EDAX. The functional groups and formed phases analyzed using FT-IR, and XRD. Further, the adhesion strength of the coatings was evaluated using scratch tester and the corrosion behavior of all samples was tested in Simulated Body Fluid (SBF-Hank's solution) using a potentiodynamic polarization studies. The sintered coating exhibited higher adhesion, lower porosity and higher density compared to unsintered samples, and higher corrosion resistance compared to the substrate. However, the corrosion resistance of the unsintered coating was superior to that of the sintered one due to the presence of minimal interconnected porosity. © 2011 Elsevier Ltd and Techna Group S.r.l.

Ceramics International

Electrophoretic deposition of nanocomposite (HAp+TiO2) on titanium alloy for biomedical applications

Journal	Materials Technology
Publisher	Informa UK Limited
ISSN	1066-7857
Open Access	0