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The Effect of Two Surface Treatments on the Tribological Behavior of Gamma‐Based Titanium Aluminides
Author(s) -
Rastkar Ahmad R.,
Niknam Ali R.,
Shokri Babak
Publication year - 2007
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200731813
Subject(s) - nitriding , materials science , carburizing , glow discharge , scanning electron microscope , titanium , microstructure , metallurgy , tin , x ray photoelectron spectroscopy , surface modification , oxidizing agent , tribology , plasma , auger electron spectroscopy , titanium alloy , analytical chemistry (journal) , chemical engineering , composite material , layer (electronics) , alloy , chemistry , organic chemistry , quantum mechanics , chromatography , nuclear physics , engineering , physics
DC glow discharge is most widely used in plasma thermochemical processes such as diffusive ion nitriding/carburizing. Gamma‐based titanium aluminides were plasma nitrided or air oxidized to compare the surface modifications arising from these treatments. The screened samples were investigated to compare the effect of these treatments. The phases and microstructures formed within the treated surface layers were characterized using X‐ray diffraction (XRD), glow discharge spectroscopy (GDS), and optical and scanning electron microscopy. The compound layers consisted of TiN and Ti 2 AlN in nitrided samples, and TiO 2 and Al 2 O 3 in oxidized samples. The wear resistance of the surface‐treated samples increased considerably against ball bearing steel (AISI 52100). The overall effect of oxidizing treatment was as good as plasma nitriding.