The effects of laser nitriding on surface hardness, corrosion and wear behavior of the conventional biomedical implants such as commercially available pure titanium and Ti-13Nb-13Zr alloy is reported. The influence of alloying elements such as Zr and Nb on nitride formation was also studied by nitriding the newly developed alloy (Ti-13Nb-13Zr). The surface modified samples were characterized using optical microscope (OM), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) techniques. Corrosion rate, wear rate and coefficient of friction were made under simulated body condition for commercially available pure titanium and Ti-13Nb-13Zr alloy. The high speed processing of these alloys enabled smooth and crack free surface. © 2009 Elsevier B.V. All rights reserved.

Sathish A-S

VIT Business School

Chennai Campus

Geetha M

Department of Control and Automation

School of Electrical Engineering

Vellore Campus

Pandey N.D

Richard C

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

Materials Science and Engineering: C

Fulltext

Titanium Alloys - Novel Aspects of Their Processing [Working Title]

Processing of Beta Titanium Alloys for Aerospace and Biomedical Applications

Materials Technology

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

This paper reports the wear characteristics of the ceramic coatings made with Al2O3 and also with SiC which were performed using atmospheric plasma spraying technique on the Ti-6Al-4V biomedical alloy with the aim of improving their tribological behavior. The wear behavior of the coatings was evaluated using reciprocatory wear tester with coated substrate as the flat and alumina ball as a friction partner in simulated body fluid (Hank's solution) environment. The microstructure and phase composition of the ceramic powders and as-sprayed coatings have been characterized using scanning electron microscope and X-ray diffractometer. Porosity, microhardness, adhesion strength and roughness of the coatings were measured as they have a bearing on wear and friction behavior. The results indicate that plasma sprayed Al2O 3 coating exhibits higher wear resistance compared to that of plasma sprayed SiC coating. The higher wear resistance of Al2O3 coating is attributed to the improved melting and spreading of the alumina particles onto the substrate yielding increasingly bonded splats, resulting in compact and dense microstructure with lower porosity and higher microhardness. © 2013 Indian Institute of Metals.

Transactions of the Indian Institute of Metals

A comparative Study on the Wear Behavior of Al2O3 and SiC Coated Ti-6Al-4V Alloy Developed Using Plasma Spraying Technique

This paper reports on the sliding wear performance of the nanostructured Al2O3-13TiO2, ZrO2 and the bilayered (ZrO2/Al2O3-13TiO2) coated biomedical Ti-13Nb-13Zr alloy in simulated body fluid condition. The nanopowders were sprayed using an atmospheric plasma spray technique and the reciprocatory sliding wear behavior of all the above coatings was evaluated using wear testing machine. The bilayered (ZrO2/Al2O3-13TiO2) coating which has not been reported hitherto exhibited two hundred and five hundred fold increase in the wear resistances when compared with that of the nanostructured Al2O3-13TiO2 (AT) and ZrO2 (YSZ) coatings. This substantial improvement in the wear resistance of the bilayered coating is attributed to its lower porosity and higher adhesion strength when compared to the AT and YSZ coatings. This study suggests that this new type of bilayered coating may be a preferred approach to be tried for obtaining much higher wear resistant coatings. © 2011 Elsevier B.V.

Wear

Sliding wear behavior of plasma sprayed nanoceramic coatings for biomedical applications

Wear response of heat-treated Ti–13Zr–13Nb alloy in dry condition and simulated body fluid

Surface and Coatings Technology

Laser nitriding of titanium alloy in the atmosphere environment

Electrochemical properties of the laser nitrided surfaces of Ti–6Al–4V alloy

Clay - thermoset polyester nanocomposites and conventional clay filled composites are produced using organo-modified clay as the reinforcement and unmodified inorganic clay as filler, respectively. Composites are prepared with clay contents of 1 wt.%, 3 wt.% and 5 wt.%. Tribological property of the nanocomposite system is studied to assess the influence of nanoclay and compared with conventional clay filled composites. The wear test is carried out on a pin-on-disc tribometer with the composite pin sliding over a disc made of tool steel. The coefficient of friction and wear loss decreases significantly on addition of organoclay, whereas for conventional clay filled composites wear loss and coefficient of friction increases with increase in inorganic clay content. The nanocomposites exhibit a maximum of 85% improvement in wear resistance and 35% decrease in coefficient of friction. The highest wear resistant and least coefficient of friction is observed in the nanocomposite with a clay content of 3 wt.%. © 2006 Elsevier B.V. All rights reserved.

Tribological behaviour of clay - thermoset polyester nanocomposites

Surface morphology of a laser surface nitrided and etched Ti–6Al–4V alloy

Studies on the corrosion and wear behavior of the laser nitrided biomedical titanium and its alloys

Journal	Data powered by TypesetMaterials Science and Engineering: C
Publisher	Data powered by TypesetElsevier BV
ISSN	0928-4931
Open Access	0