Nanostructural studies of PVD TiAlB coatings
Date
2006Author
Monclus, M. A.Baker, M. A.
Rebholz, Claus
Stolojan, V.
Gibson, P. N.
Leyland, A.
Matthews, A.
Source
Surface and Interface AnalysisVolume
38Pages
731-735Google Scholar check
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TiAlB coatings with different compositions were deposited by co-sputtering from TiAl and TiB2 targets onto AISI316 stainless steel substrates at a temperature of 170 °C. The stoichiometry and nanostructure have been studied by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Analysis of the XPS spectra suggests the presence of phases in agreement with the equilibrium Ti-Al-B phase diagram. Diffraction studies (XRD and TEM) indicate that coatings with B/Al ratios 6 exhibit a nanocomposite structure with average TiB2 grain sizes of ∼2-3 nm for the highest B/Al ratio of 16. Nanocomposite coatings show significantly improved H/E ratios that are beneficial for protecting soft steels and light alloys. Copyright © 2006 John Wiley & Sons, Ltd.