RT Journal Article
T1 Effects of plasma immersion ion implantation of oxygen on mechanical properties and microstructure of Ti6A14V
A1 Loinaz, A.
A1 Rinner, M.
A1 Alonso, F.
A1 Oñate, J. I.
A1 Ensinger, W.
AB 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 Ti6A14V 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 Ti6A14V 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 Ti6A14V samples. Scanning electron microscopy and optical profilometry showed an important roughening of the Ti alloy surface after PIII treatment under selected conditions.
SN 0257-8972
YR 1998
FD 1998-05
LK https://hdl.handle.net/11556/2963
UL https://hdl.handle.net/11556/2963
LA eng
NO Loinaz , A , Rinner , M , Alonso , F , Oñate , J I & Ensinger , W 1998 , ' Effects of plasma immersion ion implantation of oxygen on mechanical properties and microstructure of Ti6A14V ' , Surface and Coatings Technology , vol. 103-104 , pp. 262-267 . https://doi.org/10.1016/S0257-8972(98)00411-3
NO The authors from INASMET are grateful for the financial support granted by the Basque Government and the Spanish “Comisión Interministerial de Ciencia y Tecnologı́a-CICYT” under PETRI Project No. 95-0072-CT. M. Rinner acknowledges the European Commissions for the financial support in the frame of a TMR Marie Curie fellowship, Contract No. ERBFMBICT 950192. The authors would like to thank Professor B. Rauschenbach for the support of this work.
DS TECNALIA Publications
RD 30 jul 2024