Isobaric Thermal Expansion and Isothermal Compression of Powdered NiFe Based Alloys Studied by In-Situ EDXRD

D. Olekšákováa, J. Füzerb, P. Kollárb, J. Bednarčíkc, C. Lathed aDpt. of Appl. Mathematics and Informatics, Fac. of Mechanical Eng., TUKE, Letná 9, 042 00 Košice, Slovakia bInstitute of Physics, Faculty of Sciences, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia cHASYLAB am Deutschen Elektronen Synchrotron, DESY, Notkestrasse 85, D-22607 Hamburg, Germany dGeo Forschungs Zentrum Potsdam at DESY/Hasylab, Notkestrasse 85, D-22607 Hamburg, Germany

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The aim of the present work was to study the isothermal compression and isobaric thermal expansion behaviour of ball-milled NiFe (81 wt.% of Ni) and NiFeMo (79 wt.% of Ni, 16 wt.% of Fe) alloy and follow its phase evolution when exposed to high pressure and temperature. In-situ pressure-temperature energy dispersive X-ray (EDXRD) diffraction experiments were performed at the MAX80 instrument (beamline F2.1). The compressibility of NiFe alloy at 400 °C was evaluated for pressure values of up to 3.5 GPa. The EDXRD spectra revealed the presence of cubic FeNi3 phase as determined from the shift of (111), (200) and (220) reflection lines in corresponding EDXRD spectra.

DOI: 10.12693/APhysPolA.126.128 PACS numbers: 75.50.Bb, 61.05.cp