Entalpy of Mixing, Microstructure, Structural, Thermomagnetic and Mechanical Properties of Binary Gd-Pb Alloys

Piotr Gębara; Mariusz Hasiak; Jozef Kovac; Michal Rajnak

doi:10.3390/ma15207213

Entalpy of Mixing, Microstructure, Structural, Thermomagnetic and Mechanical Properties of Binary Gd-Pb Alloys

Materials (Basel). 2022 Oct 16;15(20):7213. doi: 10.3390/ma15207213.

Authors

Piotr Gębara¹, Mariusz Hasiak², Jozef Kovac³, Michal Rajnak³

Affiliations

¹ Department of Physics, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Czestochowa, Poland.
² Department of Mechanics, Materials and Biomedical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, 50-370 Wroclaw, Poland.
³ Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia.

Abstract

The aim of the present work is to study the phase composition, microstructure and magnetocaloric effect of binary Gd_100-xPb_x (where x = 5, 10, 15 and 20) alloys. The XRD and SEM/EDX analysis confirmed a biphasic structure built by Gd(Pb) and Gd₅Pb₃ phases. The analysis of M vs. T curves showed the evolution of the Curie point of recognized phases. The temperature dependences of magnetic entropy change revealed two maxima corresponding to the recognized phases. The analysis of the exponent n (ΔS_M_max = C(B_max)ⁿ) confirmed the multiphase composition of the produced alloys. The same behavior was also observed in investigations of mechanical properties.

Keywords: Gd-based alloys; SEM; XRD; magnetocaloric effect.

Abstract

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