Influence of the alloying effect on nickel K-shell fluorescence yield in Ni–Si alloys

Kalaycı, Yakup; Ağuş, Yusuf; Ozgur, S.; Efe, N.; Zararsız, Abdullah; Arikan, P.; Mutlu, R.H.

doi:10.1016/j.sab.2004.12.008

Cited by 17 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In spite of the low resolution achieved (see above), some differences can be observed when comparing the absorption spectrum of Ni metal with those of the Ni silicides. Unlike Ni metal, the self-absorption spectra of the Ni silicides do not show any overshoot, which suggests changes in the occupancies of the d states upon reacting with Si (Franciosi et al, 1982; Kalayci et al, 2005). The Ni L 3 edges of the Ni silicides also reveal a shift toward higher energies as the Ni content decreases.…”

Section: Resultsmentioning

confidence: 99%

Electron Probe Microanalysis of Ni Silicides Using Ni-L X-Ray Lines

et al. 2016

View full text Add to dashboard Cite

We report electron probe microanalysis measurements on nickel silicides, Ni5Si2, Ni2Si, Ni3Si2, and NiSi, which were done in order to investigate anomalies that affect the analysis of such materials by using the Ni L3-M4,5 line (Lα). Possible sources of systematic discrepancies between experimental data and theoretical predictions of Ni L3-M4,5 k-ratios are examined, and special attention is paid to dependence of the Ni L3-M4,5 k-ratios on mass-attenuation coefficients and partial fluorescence yields. Self-absorption X-ray spectra and empirical mass-attenuation coefficients were obtained for the considered materials from X-ray emission spectra and relative X-ray intensity measurements, respectively. It is shown that calculated k-ratios with empirical mass attenuation coefficients and modified partial fluorescence yields give better agreement with experimental data, except at very low accelerating voltages. Alternatively, satisfactory agreement is also achieved by using the Ni L3-M1 line (Lℓ) instead of the Ni L3-M4,5 line.

show abstract

Section: Resultsmentioning

confidence: 99%

Electron Probe Microanalysis of Ni Silicides Using Ni-L X-Ray Lines

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The changes in the valence electronic structure and 3d electron population of elements in those alloys were clarified by rearrangement and charge transfer models [6]. In addition to these studies, the alloying effect on the K-shell fluorescence yield was investigated for Ni in Ni-Si alloys [7] and for Cr, Ni, and Al elements in Cr x Ni 1−x and Cr x Al 1−x alloys [8]. Electronic structures of Au-Al thin-film alloys by high-energy x-ray photoelectron spectroscopy (XPS) and x-ray absorption near-edge structure (XANES) were studied.…”

Section: Introductionmentioning

confidence: 99%

Effect ofpH treatment onK-shell x-ray intensity ratios andK-shell x-ray-production cross sections in ZnCo alloys

et al. 2011

View full text Add to dashboard Cite

In this study, empirical and semiempirical K-shell fluorescence yields (ω K ) and Kβ/Kα intensity ratios from the available experimental data for elements with 23 Z 30 were calculated to compare them with elements in different alloys. The experimental data are fitted using the quantity [ω K /(1 − ω K )] 1/4 vs Z to deduce the empirical K-shell fluorescence yields and Kβ/Kα intensity ratios. The empirical and semiempirical K-shell fluorescence yield values were used to calculate the K x-ray-production cross-section values for pure Co and Zn elements. Also, σ Kα , σ Kβ production cross sections and Kβ/Kα intensity ratios of Co and Zn have been measured in pure metals and in different alloy compositions which have different pH values. The samples were excited by 59.5-keV γ rays from a 241 Am annular radioactive source. K x rays emitted by samples were counted by an Ultra-LEGe detector with a resolution of 150 eV at 5.9 keV. The effect of pH values on alloy compositions and the effect of alloying on the fluorescence parameters of Co and Zn were investigated. The x-ray fluorescence parameters of Co and Zn in the alloying system indicate significant differences with respect to the pure metals. These differences are attributed to the reorganization of valence shell electrons and/or charge transfer phenomena.

show abstract

“…The experimental values used in this work to calculate empirical and semiempirical data for elements from 25 Mn to 30 Zn relies on the published experimental data of Refs. []. The semiempirical method was based on both theoretical values, calculated using the relativistic Hartree–Slater theory taken from the work of Scofield for K β / K α intensity ratios, selected semiempirical values of Krause for the K‐shell fluorescence yield and to the experimental values of K β / K α intensity ratios and ω K , respectively.…”

Section: Calculation Procedures For ωK and Kβ/kα Intensity Ratiosmentioning

confidence: 99%

The investigation of K-shell fluorescence parameters of Zn-Fe alloys with different grain size and microstrain values

et al. 2017

View full text Add to dashboard Cite

It is known that zinc alloys with iron group metals have better corrosion resistance than pure zinc. Owing to the corrosion resistance of these alloys, Zn-Fe coatings are widely used in automotive industry and have excellent mechanical performance. In this work, we investigated the relationship between the changes in the measured X-ray fluorescence parameters (K β /K α , σ Kα and σ Kβ ) and the changes in the structural parameters such as microstrain or grain size values for Zn-Fe alloys that were prepared with different pH values. To explain these changes, the K α and K β X-ray production cross sections, and the K β /K α X-ray intensity ratio values were calculated by three different ways for the elemental forms of Zn and Fe. The structural parameters, such as microstrain and grain size, were also calculated. We expect that the outer shell electronic distribution affects the structural parameters of the produced Zn-Fe alloys, changing the measured K α and K β X-ray production cross sections, and the K β /K α X-ray intensity ratio values. We also show that Zn-Fe alloy mi nimum microstrain value corresponds to the maximum changes in K β X-ray production cross-section values of Fe and Zn.

show abstract

Influence of the alloying effect on nickel K-shell fluorescence yield in Ni–Si alloys

Cited by 17 publications

References 14 publications

Electron Probe Microanalysis of Ni Silicides Using Ni-L X-Ray Lines

Electron Probe Microanalysis of Ni Silicides Using Ni-L X-Ray Lines

Effect ofpH treatment onK-shell x-ray intensity ratios andK-shell x-ray-production cross sections in ZnCo alloys

The investigation of K-shell fluorescence parameters of Zn-Fe alloys with different grain size and microstrain values

Contact Info

Product

Resources

About