High-temperature creep and structure investigation of nearly stoichiometric Fe3Si

Vega, H.; Krämer, U.; Försterling, G.; Kleinstück, K.

doi:10.1007/bf00553425

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“…Much lower T D -values viz. 250-375 K, were determined from XRDmeasurements on a powder sample of Fe 3 Si subjected to different heat treatments [24]. One of the aims of the present study was to experimentally determine the value of T D using the Mössbauer spectroscopy as a tool.…”

Section: Introductionmentioning

confidence: 99%

Site-resolved hyperfine and lattice dynamical properties of a single-crystal Fe3Si

Dubiel

Żukrowski

2020

Journal of Alloys and Compounds

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A single-crystal sample of a DO 3 -ordered Fe 3 Si compound was studied by means of the 57 Fe Mössbauer spectroscopy. Spectra have been recorded in a transmission geometry in the temperature range between 5 and 850 K. They have been analyzed either in terms of five sextets or five hyperfine field distribution curves. Concerning the former three sub spectra have been attributed to Fe atoms occupying the B sites and having 8Fe, 7Fe1Si and 6Fe2Si atoms in the first coordination shell (1NN), respectively, and two have been attributed to Fe atoms residing on the A and C sites and having 4Fe4Si and 3Fe5Si atoms in the 1NN, respectively. Based on the temperature dependence of the center shifts values the Debye temperature, T D , have been determined. T D was found to be equal to 491 (11) K for the sites A and C, and to 403 (3) K the site B. The smaller value of T D coincides with the smaller values of the hyperfine field, H. Changes in H caused by one Si atom present in the 1NN have been determined as H13 kOe for Fe atoms occupying the A and C sites and H54 kOe for Fe atoms present on the B sites. These changes have been also expressed in terms of the underlying number of polarized s-like electrons, N s . For the Fe atoms situated on the A and C sites N s =0.03 was found while for those occupying the B sites N s =0.17.

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Section: Introductionmentioning

confidence: 99%