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.

Mamidanna Sri Ramachandra Rao

Durgalakshmi D

Chandran M

Manivasagam G

Ramachandra Rao M.S

Asokamani R.

Chemical vapor deposition

corrosion

Corrosion resistance

Diamond films

Diamonds

Electrochemical corrosion

Metal implants

Niobium

tantalum

titanium

Wear of materials

Wear resistance

Zirconium

Beta-phase

COATED SAMPLE

Corrosion and wears

DEPOSITED FILMS

Hot-filament chemical vapor deposition

Simulated body fluids

WEAR AND CORROSION RESISTANCE

Wear behaviors

Titanium alloys

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

Tribology International

Present competitive world is looking for Components with high strength and fatigue resistance finding their applications in aerospace, turbine parts and especially bio-medical devices with high bio-compatibility. Advanced surface engineering techniques are required to produce parts of higher complexities and desirable surface qualities. Laser peening stood first in a row of all various surface treatments of metallic component. This paper discusses about the mechanical properties like hardness and roughness then the surface morphology and the corrosion behaviour of the laser peened titanium samples with and without coating. © Published under licence by IOP Publishing Ltd.

Fulltext

IOP Conference Series: Materials Science and Engineering

Investigation of Mechanical, Microstructural and Corrosion behaviour of Titanium subjected to Laser Peening with and without Ablation

Materials Technology

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

International Journal of Nanomedicine

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

The electrochemical behaviour of CP-Ti (commercially pure-Ti) and Ti-6Al-4V, commonly used implant materials, particularly for orthopedic and osteosynthesis applications, were investigated together with that of other Ti based alloys viz. Ti-13Nb-13Zr, Ti-15V-3Cr-3Al-3Sn, Ti-13Nb-20Zr, Ti-20Nb-20Zr and gum metal. The corrosion properties were evaluated through the analysis of the corrosion potential variation with time, potentiodynamic polarisation curves, and electrochemical impedance spectroscopy (EIS) test results. Very low current densities were obtained (order of nA cm-2) from the polarisation curves, indicating a typical passive behaviour for all investigated alloys in artificial physiological solution. The corrosion rates obtained were in the order CP-Ti&gt;Ti-6Al-4V&gt;Ti-15V-3Cr-3Al-3Sn&gt;Ti-20Nb-20Zr&gt;Gum metal.Ti-13Nb-13Zr. The EIS results clearly revealed the capacitive behaviour (high corrosion resistance) with phase angles close to -60° and high impedance values (order of 104 V cm-2) at low and medium frequencies, which are indicative of the formation of highly stable film on these alloys in the test solution. The obtained EIS spectra indicated two relaxation time constants and their interpretation in terms of an 'equivalent circuit' with the circuit elements representing the electrochemical properties of a bi-layered structure, was in good agreement. © 2014 W. S. Maney &amp; Son Ltd.

Comparative study of electrochemical behaviour of CP-titanium and Ti–6Al–4V with other titanium based alloys for biomedical applications

Biomedical implants in the knee and hip are frequent failures because of corrosion and stress on the joints. To solve this important problem, metal implants can be coated with diamond carbon, and this coating plays a critical role in providing an increased resistance to implants toward corrosion. In this study, we have employed diamond carbon coating over Ti-6Al-4V and Ti-13Nb-13Zr alloys using hot filament chemical vapor deposition method which is well-established coating process that significantly improves the resistance toward corrosion, wears and hardness. The diamond carbon-coated Ti-13Nb-13Zr alloy showed an increased microhardness in the range of 850 HV. Electrochemical impedance spectroscopy and polarization studies in SBF solution (simulated body fluid solution) were carried out to understand the in vitro behavior of uncoated as well as coated titanium alloys. The experimental results showed that the corrosion resistance of Ti-13Nb-13Zr alloy is relatively higher when compared with diamond carbon-coated Ti-6Al-4V alloys due to the presence of β phase in the Ti-13Nb-13Zr alloy. Electrochemical impedance results showed that the diamond carbon-coated alloys behave as an ideal capacitor in the body fluid solution. Moreover, the stability in mechanical properties during the corrosion process was maintained for diamond carbon-coated titanium alloys. © 2018, ASM International.

Journal of Materials Engineering and Performance

Electrochemical Behavior of Biomedical Titanium Alloys Coated with Diamond Carbon in Hanks’ Solution

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

Procedia Materials Science

Enhancement of Dry Sliding Wear Characteristics of CK45 Steel Alloy by Laser Surface Hardening Processing

Journal of Biomedical Materials Research Part A

Tailoring nanocrystalline diamond coated on titanium for osteoblast adhesion

Acta Biomaterialia

Cytotoxicity evaluation of nanocrystalline diamond coatings by fibroblast cell cultures

In the present work, powder metallurgy processing was used to synthesize a titanium rich composite containing in situ formed bioactive calcium-phosphatic phases. The potential application of such a composite includes load-bearing implants. In view of the importance of friction and wear in biomedical applications, the present work was taken up to investigate the friction and wear properties of such Ti-Ca-P composite at fretting contact against bearing steel in simulated body fluid (SBF) environment. A comparison was also made with fretting behaviour in dry conditions. Tribological experiments were carried out on a biocomposite against bearing steel at different loads (2, 5 and 10 N) for 10,000 cycles with displacement stroke set to 80 μm and at 10 Hz frequency using a low amplitude reciprocatory fretting wear tester. In addition to reporting the measured tribological data, a major focus of the work was in understanding dominant wear mechanisms under dry ambient and physiological environment. © 2007 Elsevier B.V. All rights reserved.

Materials Science and Engineering A

Fretting wear study on Ti-Ca-P biocomposite in dry and simulated body fluid

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

Journal	Data powered by TypesetTribology International
Publisher	Data powered by TypesetElsevier Ltd
ISSN	0301679X
Open Access	No