Premium
Plasma surface modification of Ti and TiAlV alloy
Author(s) -
Mohai M.,
Tóth A.,
Sajó I.,
Ujvári T.,
Bertóti I.
Publication year - 2004
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1864
Subject(s) - nitriding , surface modification , rutile , x ray photoelectron spectroscopy , materials science , alloy , nitrogen , titanium alloy , tin , oxide , plasma immersion ion implantation , plasma , oxidizing agent , hardness , titanium , aluminium , metallurgy , surface layer , analytical chemistry (journal) , ion implantation , layer (electronics) , ion , chemistry , chemical engineering , composite material , environmental chemistry , physics , organic chemistry , quantum mechanics , engineering
Surface modification of commercially pure Ti and of Ti6Al4V alloy samples was performed by plasma immersion ion implantation with 25 kV energy. Plasma was generated by RF discharge in air, in nitrogen, or in a mixture of nitrogen and methane. Treatment in air plasma produced an oxide layer on the surface without appreciable incorporation of nitrogen, as detected by XPS. Significant surface enrichment of aluminium was measured after air plasma treatment of Ti6Al4V, but no such segregation was observed after nitrogen plasma treatment. These effects are interpreted by involvement of thermodynamic driving forces. Development of rutile and a sub‐stoichiometric oxide were identified on Ti while no crystalline phases could be evaluated on the Ti6Al4V upon oxidation. The cubic TiN phase was found after nitrogen PIII treatment on both Ti and Ti6Al4V. Nanomechanical tests showed a significant increase in the hardness for Ti6Al4V after oxidizing PIII treatment in air. Considerable change in hardness could not be measured, however, after nitriding PIII treatments. Copyright © 2004 John Wiley & Sons, Ltd.