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Tribological Properties of Ti6Al4V Alloy Co-Implanted with N and F Ions
Pages: 1279-1285
Year: Issue:  11
Journal: Vacuum Science and Technology

Keyword:  Ti6Al4VPlasma based ion implantationTribological properties;
Abstract: The surfaces of Ti6Al4 V alloy were co-doped with N and F by plasma immersion ion implantation.The influence of the reaction conditions,including the bias voltage,contents of N and F,and implantation time,on the microstructures,phase-structures and tribological properties of the alloy was investigated X-ray photoelectron spectroscopy,scanning electron microscopy,atomic force microscopy and conventional mechanical probes. The results show that co-implantation of N and F ions significantly improved the mechanical behavior of Ti6Al4 V alloy. To be specific,the surface nano-hardness and elastic modulus increased,accompanied by decreases of the friction coefficient and wear rate,possibly because of a decrease of surface roughness and formation of Ti O2,Ti F3,Ti F4 and Ti N phases in the modified layers. Abrasive wear had a major impact. F-ion-implanted at-20 k V,the Ti6Al4 V alloy displayed the best tribologicalbehavior of the samples.
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