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- W2018391055 abstract "Plasma immersion ion implantation (PIII) is a surface treatment with increasing interest, as it offers the possibility of performing three-dimensional ion beam treatments, reducing the need for manipulation under vacuum to obtain a uniform treatment in geometrically complex parts. In this work the PIII process has been used to perform surface treatment on Ti6Al4V alloy. This Ti alloy is commonly used in aerospace and biomedical applications, due to its good combination of mechanical and chemical properties, such as strength to weight ratio, corrosion resistance or bioinertness. However, due to its poor tribological properties, the use of surface treatments to improve wear resistance or decrease friction coefficient is often recommended. PIII has been used to implant the surface of Ti6Al4V alloy with oxygen ions. The oxygen plasma was generated by electron cyclotron resonance microwave excitation, working at two different pressures. At the lower pressure plasma density was increased by means of an external ring magnet. High voltage pulses of −40 kV, at of 400 and 600 Hz pulse repetition rates, were applied. Elastic recoil detection (ERD) analysis showed retained doses in the range of 3×1017 to 1×1018 O atoms cm−2, with oxygen concentration values ca 65% in the near surface region. Surface mechanical properties such as hardness, wear and friction have been evaluated. Microindentation tests showed an increase of up to 100% in the surface hardness of the ion implanted samples compared to the non implanted material. Dry pin-on-disk tests with spherical ended UHMWPE pins showed a very significant increase in wear resistance in oxygen implanted Ti6Al4V samples. Scanning electron microscopy and optical profilometry showed an important roughening of the Ti alloy surface after PIII treatment under selected conditions." @default.
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- W2018391055 date "1998-05-01" @default.
- W2018391055 modified "2023-10-17" @default.
- W2018391055 title "Effects of plasma immersion ion implantation of oxygen on mechanical properties and microstructure of Ti6Al4V" @default.
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- W2018391055 doi "https://doi.org/10.1016/s0257-8972(98)00411-3" @default.
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