Effects of plasma immersion ion implantation (PIII) of nitrogen on hardness, composition and corrosion resistance of Ti-6Al-4V alloy

Silva, Leide Lili G. da; Ueda, M.; Silva, Maria M. da; Codaro, Eduardo Norberto

doi:10.1590/s0103-97332006000600051

Cited by 7 publications

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References 10 publications

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“…In the nitrogen PBII treatments at 800°C [Refs. 17,18] and in the treatments of this work, the polarization curves analysis indicated that the corrosion rate is very similar for all the treated samples at high temperature, i.e., the corrosion current density values are very similar. For all treatments at temperatures between 660°C and 800°C, the corrosion potential was below the corrosion potential of the untreated sample.…”

Section: Resultssupporting

confidence: 51%

Improvements of the surface properties of Ti6Al4V by plasma based ion implantation at high temperatures

Silva

Ueda

Otani

et al. 2010

Surface and Coatings Technology

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Ti6Al4V is a titanium alloy that has many applications in aerospace industry due to its good mechanical and corrosion properties, but its poor tribological characteristics can restrict the use of this material. In order to modify its surface properties, nitrogen PBII treatments were performed. Here, an auxiliary heating system was used to reach the required high temperatures, which can improve the nitrogen diffusion in the titanium alloy. As a consequence, the modified thickness could be increased substantially. After nitrogen PBII experiments, the Ti6Al4V alloy surface properties were evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy, nanoindentation and pin-on-disk tests. The morphology of the surface after corrosion tests was obtained by SEM. The surface properties of the Ti6Al4V alloy were improved after PBII, showing better performance in corrosion, mechanical and tribological tests.

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Section: Resultssupporting

confidence: 51%