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Body fluids and relative motion between implant and bone lead to synergistic degradation reactions, which cause failed implantation or adverse tissue reactions for implant materials used in human body. Because of their good chemical biocompatibility as well as acceptable mechanical properties, titanium (CP Ti) and its alloys are widely used in implant applications. β-type Ti alloys including alloying...
Plasma nitriding is an effective surface treatment to improve unsatisfactory wear properties of machine elements. Such machine elements may also subject to magnetic fields in many industrial applications. Therefore, AISI 4140 ferromagnetic steel samples were plasma nitrided. Then, the samples were quenched in water and then post-aged at a temperature of 400°C for 30 and 120min in plasma environment...
Different kinds of diffusion processes, plasma nitriding, oxidizing and oxynitriding as of a combination of other two, have been applied to Ti6Al4V alloy to evaluate the effect of treatment times (1 and 4h) and temperatures (650 and 750°C) on wear properties of the alloy. It was observed that a hard modified layer was produced on the surface of the alloy after each diffusion process. While TiN and...
Ti6Al4V alloy has been widely used as a suitable material for surgical implants such as artificial hip joints. Although this alloy is biocompatible, its wear resistance is inadequate. Therefore, three different surface treatments which were plasma nitriding, TiAlN thin film deposition by closed field unbalanced magnetron sputtering (CFUBMS) and Al 2 O 3 coating using plasma spray method...
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