Hybrid processing of Ti-6Al-4V using plasma immersion ion implantation combined with plasma nitriding

Materials Research

Maria Margareth Da Silva¹  Mário Ueda²  Choyu Otani²  Helfried Reuther²  Carlos Maurício Lepienski²  Paulo César Soares Junior²  Jorge Otubo¹ 

[1] ,Instituto Tecnológico de Aeronáutica Divisão de Engenharia Mecânica-Aeronáutica S. J. Campos SP ,Brazil

关键词: Ti6Al4V;    Plasma Nitriding;    Plasma Immersion Ion Implantation;    mechanical properties;   

DOI  :  10.1590/S1516-14392006000100018

来源: SciELO

【 摘 要 】

Based on the fact that the Ti-6Al-4V alloy has good mechanical properties, excellent resistance to corrosion and also excellent biocompatibility, however with low wear resistance, this work aims to test plasma processes or combination of plasma and ion implantation processes to improve these characteristics. Two types of processing were used: two steps PIII (Plasma Immersion Ion Implantation) combined with PN (Plasma Nitriding) and single step PIII treatment. According to Auger Electron Spectroscopy (AES) results, the best solution was obtained by PIII for 150 minutes resulting in ~ 65 nm of nitrogen implanted layer, while the sample treated with PIII (75 minutes) and PN (75 minutes) reached ~ 35 nm implanted layer. The improvement of surface properties could also be confirmed by the nanoindentation technique, with values of hardness increasing for both processes. AFM (Atomic Force Microscopy) characterization showed that the single step PIII process presented greater efficiency than the duplex process (PIII + PN), probably due to the sputtering occurring during the second step (PN) removing partially the implanted layer of first step (PIII).

【 授权许可】

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