Journal ArticleDOI
Surface modification of titanium alloys for combined improvements in corrosion and wear resistance
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TLDR
A simple and effective surface modification technique, namely palladium-treated thermal oxidation (PTO), has been developed in the present research as discussed by the authors, which has a significantly superior corrosion resistance in boiling HCl solutions compared to the PN-treated and untreated materials.Abstract:
A simple and effective surface modification technique, namely palladium-treated thermal oxidation (PTO), has been developed in the present research. Comparative investigations on both corrosion and wear resistance have been carried out on surface-engineered titanium-based materials by conventional plasma nitriding (PN), thermal oxidation (TO), and the newly developed palladium-treated thermal oxidation (PTO). Both the TO- and PTO-treated materials have a significantly superior corrosion resistance in boiling HCl solutions compared to the PN-treated and untreated materials. The lifetime for the protective surface layer breakdown of the TO-treated titanium in boiling 20% HCl solution is about 13 times that of the PN-treated titanium, whereas the lifetime of the PTO-treated material has been increased further by a factor of 2.6 over the TO-treated material. The PTO-treated material has shown a better anti-scuffing capacity than the TO-treated material under oil-lubricated conditions. Characterisation of both the TO- and PTO-treated surface layers was performed using glow discharge spectrometry (GDS), X-ray diffraction (XRD) and scanning electron microscopy (SEM).read more
Citations
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Characterisation of oxide films produced by plasma electrolytic oxidation of a Ti–6Al–4V alloy
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Enhancing the microstructure and properties of titanium alloys through nitriding and other surface engineering methods
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Surface modification of titanium and titanium alloys: Technologies, developments, and future interests
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Oxidation of Ti-6Al-4V alloy
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TL;DR: In this paper, an analysis of the ODZ depth and hardness measurements resulted in an activation energy of 202 kJ/mol for oxygen diffusion in Ti-6Al-4V alloy.
References
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Journal ArticleDOI
Surface engineering TO improve tribological performance of Ti-6Al-4V
TL;DR: A series of thermal oxidising treatments have been carried out on Ti-6Al-4V alloy at temperatures ranging from 600 to 850°C to develop a new surface engineering technique for Ti−6Al−4V and other tita....
Journal ArticleDOI
The Effect of Anion Vacancies on the Tribological Properties of Rutile (TiO2-x), Part II: Experimental Evidence
TL;DR: In this article, the authors investigate the environmental influences on anion vacancy formation, as related to a recent hypothesis connecting oxygen substoichiometry with predictable variations in the tribological properties of rutile.
Journal ArticleDOI
Passivity and Corrosion Resistance of Titanium and Its Alloys
TL;DR: In this article, a review of possible ways to increase corrosion resistance of titanium in acids is given from analysis of its electrochemical characteristics and passive state stability, and rational ways of alloying titanium for acid resistance are indicated.
Journal ArticleDOI
New surface modification for Ti-6Al-7Nb alloy: oxygen diffusion hardening (ODH).
TL;DR: PVD-TiN coating and N+ implantation of Ti-6Al-7Nb alloy resulted in surface hardening to a depth of less 3 microns, and the new oxygen diffusion hardening (ODH) treatment increased the hardness gradually to 50 microns.
Journal ArticleDOI
Effect of Oxide Films on the Corrosion Resistance of Titanium
R. W. Schutz,L. C. Covington +1 more
TL;DR: A comparison of the corrosion and hydrogen uptake resistance of pickled, anodized, and thermally oxidized titanium is made in this paper, where thermal oxidation appears to offer better protection.
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