Chemical State Analysis of 0.2 mass Mo in Steel by XAFS

Nagoshi, Masayasu; Kawano, Teruaki; Sato, Kaoru; Funakawa, M.; Shiozaki, Tadashi; Kobayashi, Kensuke

doi:10.1238/physica.topical.115a00480

Cited by 8 publications

(2 citation statements)

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“…In this study, the fraction of Nb in the bcc-matrix (x) was determined using the EXAFS analysis technique. 6) The average coordination number of Fe atoms around the dissolved Nb atoms was evaluated by a curve fitting for the inverse FT curves (k 3 -weighted) of the 1 st and 2 nd nearest neighbors. The ratio of the 1 st and 2 nd nearest neighbors was fixed to 8/6.…”

Section: Resultsmentioning

confidence: 99%

“…2) XAFS is a powerful tool for clarifying chemical states and local structures of specific elements in steel. [3][4][5][6] X-ray fluorescence (XRF) yield XAFS techniques have the advantage of high sensitivity to trace elements. This technique is especially valuable for elements substituting matrix atoms and forming atomic level clusters or nanometer-sized precipitates.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Analysis of Nb in Steel Utilizing XRF-yield XAFS Edge Jump

Nagoshi¹,

Aoyama²,

Tanaka³

et al. 2013

ISIJ Int.

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X-ray fluorescence (XRF) yield x-ray absorption fine structures (XAFS) have been investigated in terms of quantitative analysis for steel sheets containing 31-2 100 ppm of Nb. Nb concentrations in the samples were determined with high accuracy from the height of the K-edge jump. The detection limit was estimated down to the single digit ppm range. The combination of this technique with the conventional extended x-ray absorption fine structure (EXAFS) analysis for an identical XAFS spectrum provides both quantity and chemical state information of trace elements in the given volume of steel samples.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%