Alloying effect on K-shell fluorescence parameters of porous NiTi shape memory alloys

Cengiz E., Ozkendir O. M., Kaya M., TIRAŞOĞLU E., Karahan I. H., Kimura S., ...More

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, vol.192, pp.55-60, 2014 (SCI-Expanded) identifier identifier


The K-alpha,K-beta shell production cross-sections and K-beta/K-alpha intensity ratios of porous Ni -49 at% Ti shape memory alloys were determined using energy dispersive X-ray fluorescence (EDXRF) technique. Also, the alloying effect on the K shell fluorescence parameters was investigated. The samples were excited by 59.5 key gamma-rays from an Am-241 annular radioactive source. The K X-rays emitted by the samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 key. The structure analyses of the samples were also made using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The deviations between the present results and theoretical values, calculated for pure Ti and Ni, were attributed to charge transfer phenomena and/or rearrangement of valance shell electrons and porosity. (C) 2014 Elsevier B.V. All rights reserved.