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What can one learn about Fe-Cr alloys using Mössbauer spectroscopy?
Stanislaw M. Dubiel
Applications of the Mössbauer spectroscopy (MS) in the investigation of Fe-Cr alloys are reviewed. A high sensitivity of the hyperfine magnetic field to the presence of Cr atoms in…
Kinetics of transformation, border of metastable miscibility gap in Fe-Cr alloy and limit of Cr solubility in iron at 858 K
Stanisław M. Dubiel, Jan Żukrowski
The study was aimed at determination of the position of the Fe-rich border of the metastable miscibility gap (MMG) and of the solubility limit of Cr in iron at 858 K. Towards this…
Mössbauer Spectroscopic and XRD Studies of two eta-Fe2Al5 Intermetallics
Stanisław M. Dubiel, Łukasz Gondek, Tilo Zienert +1
Two intermetallic FeAl compounds with Al content of 70.68 and 72.17 at.pct were studied using Mössbauer spectroscopy (5 to 296 K) and X-ray diffraction (15 to 300 K). The compounds…
Mössbauer Spectroscopic Study of Amorphous Fe-Gluconate
Stanisław M. Dubiel, Łukasz Gondek, Jan Żukrowski
Amorphous Fe-gluconate was studied by means of the X-ray diffraction and Mössbauer spectroscopy. Spectra measured in the temperature range between 78 and 295 K were analysed in ter…
On the Magnetism of C14 Nb(Fe89.4Al10.6)2 Laves Phase Intermetallic Compound
Stanisław M. Dubiel, Israel Felner
C14 Nb(Fe89.4Al10.6)2 Laves phase intermetallic compound was investigated by DC magnetization (M) measurements performed in the temperature (T) interval of 20 to 175 K,under an app…
Kinetics of phase separation, border of miscibility gap in Fe-Cr and limit of Cr solubility in iron at 832 K
Stanisław M. Dubiel, Jan Żukrowski
Kinetics of phase decomposition accompanied by precipitation of sigma-phase in a Fe73.7Cr26.3 alloy isothermally annealed at 832 K was studied by means of Mössbauer spectroscopy. T…
On the miscibility gap at 800 K in the Fe-Cr alloy system
Stanislaw M. Dubiel, Jan Zukrowski
Issues pertinent to the miscibility gap at 800K in a Fe73.7Cr26.3 alloy viz. the kinetics of the phase decomposition and borders of the latter were investigated by means of the Mös…
Effect of 2 MeV Fe3+ irradiation on Fe atom site population in a sigma-phase Fe-Cr compound
S. M. Dubiel, J. Zukrowski
A sigma-Fe54.5Cr45.5 samples irradiated in vacuum with 2 MeV Fe3+ ions at 300, 400, 475 and 700 deg C to the maximum dose of 12.5 dpa were studied with the conversion electron Möss…
Distribution of Cr atoms in a strained and strain-relaxed Fe89.15Cr10.75 alloy: Mössbauer effect study
S. M. Dubiel, J. Zukrowski
A Fe89.15Cr10.75 alloy in a heavily strained (by cold rolling) and strain-relaxed states was studied by means of the conversion electrons Mössbauer spectroscopy (CEMS). Analysis of…
Phase decomposition in an Fe-Cr alloy at 402 deg C: Mössbauer spectroscopic study
S. M. Dubiel, J. Zukrowski
Phase separation in strained and strain-free samples of Fe84.85Cr15.15 induced by an isothermal annealing at 402 deg C up to 3888 h was studied by means of the Mossbauer spectrosco…
Effect of 0.25 and 2.0 MeV He-ion irradiation on short-range ordering in model (EFDA) Fe-Cr alloys
S. M. Dubiel, J. Zukrowski, Y. Serruys
The effect of He+ ion irradiation on a distribution of Cr atoms in model (EFDA) Fe(100-x)Cr(x) (x=5.8, 10.75, 15.15) was studied by means of conversion electrons Mossbauer spectros…
Dynamics of Fe atoms in Fe-gluconate as seen by Mössbauer spectroscopy
S. M. Dubiel, J. Cieslak
Fe-gluconate was studied by means of the Mössbauer spectroscopy in the temperature interval of 80-305K. The measured spectra were analyzed in terms of two subspectra and, alternati…
On the magnetism of sigma-Fe54Cr46 alloy: AC and DC susceptibility studies
S. M. Dubiel, M. I. Tsindlekht, I. Felner
Sigma-phase intermetallic compound of Fe54Cr46 was investigated using DC and AC magnetic susceptibility techniques. A clear-cut evidence was found that the sample orders magnetical…
Effect of quenching medium on short-range order in Fe-rich Fe-Cr alloys
Stanislaw M. Dubiel, Jakub Cieslak, Jan Zukrowski
Effect of a quenching medium (water, liquid nitrogen and block of brass) on a short-range ordering in Fe(100-x)Cr(x) (x less than 19) alloys was studied with the Moessbauer spectro…
Change of Cr atoms distribution in Fe85Cr15 alloy caused by 250 keV He+ ion irradiation to different doses
Stanislaw M. Dubiel, Jan Zukrowski
Redistribution of Cr atoms in a Fe85Cr15 alloy caused by its irradiation with 250 keV He ions to different doses viz. 5, 10 and 30 dpa was investigated by means of conversion elect…
Effect of He-ion irradiation on short-range ordering in model (EFDA) Fe-Cr alloys
Stanislaw M. Dubiel, Jan Żukrowski, Yves Serruys
The effect of He-ion irradiation on a short-range ordering in model Fe100-xCrx (x=5.8, 10.75, 15.15) was studied by means of conversion electrons Mossbauer spectroscopy. The alloys…
Effect of thermal history on the short-range order in Fe-Cr alloys
S. M. Dubiel, J. Cieslak
Effect of a thermal history of Fe(100-x)Cr(x) (x < 20) samples on a Cr atoms distribution within the first (1NN) and the second (2NN) neighbor-shells was studied with the Mössbauer…
Phase-decomposition-related short-range ordering in a Fe-Cr alloy
Stanislaw M. Dubiel, Jan Zukrowski
A redistribution of Cr atoms related to a phase decomposition (PD) caused by an isothermal annealing at 415 C in a 15.15 at%Cr Fe-Cr alloy was studied in an ex-situ way by the conv…
Sigma-phase in the Fe-Re alloy system: experimental and theoretical studies
J. Cieslak, S. M. Dubiel, J. Zukrowski +1
X-ray diffraction (XRD) and Mössbauer spectroscopy techniques combined with theoretical calculations based on the Korringa-Kohn-Rostoker (KKR) electronic structure calculation meth…
Structural and hyperfine characterization of σ-phase Fe-Mo alloys
J. Cieslak, S. M. Dubiel, J. Przewoznik +1
A series of nine samples of σ-Fe_{100-x}Mo_x with 44<x<57 were synthesized by a sintering method. The samples were investigated experimentally and theoretically. Using X-ray diffra…
Formation energy in σ-phase Fe-V alloys
J. Cieslak, J. Tobola, S. M. Dubiel
Formation energy of the σ-phase in the Fe-V alloy system, ΔE, was computed in the full compositional range of its occurrence (34 < x < 60) using the electronic band structure calcu…
Effect of He-ion irradiation on Fe-Cr alloys: Mössbauer - effect study
S. M. Dubiel, J. Cieslak, H. Reuther
Effect of He ion irradiation on three model Fe(100-x)Cr(x) alloys (x =5.8, 10.75 and 15.15) was investigated with the conversion electron Mössbauer spectroscopy. The study of the a…
Effect of magnetism on the lattice dynamics in the sigma-phase Fe-Cr alloys
S. M. Dubiel, J. Cieslak, M. Reissner
Anomalies in the temperature dependences of the recoil-free factor, f, and the average center shift, <CS>, measured by 57-Fe Mossbauer Spectroscopy, were observed for the first tim…
The Debye temperature of sigma-phase Fe-Mo compounds as determined with Mössbauer spectroscopy
J. Cieslak, S. M. Dubiel
The Debye temperature, T_D, of sigma-phase Fe_(100-x)Mo_x compounds with 47 < x < 56.7 was determined from the temperature dependence of the centre shift of Mössbauer spectra recor…