Work

Assessing two rapid quenching techniques for the production of La‐Fe‐Si magnetocaloric alloys in reduced annealing time

Year: 2019

Type: article

Abstract: In the present study, we compare a La-Fe-Si-based alloy doped with Mn, LaFe11.7Si1.2Mn0.1, cast by three different techniques leading to different microstructures. Arc melting, suction casting, and melt spinning are used to fabricate LaFe11.7Si1.2Mn0.1 samples to analyze the influence of as-cast microstructure and distribution of phases on annealing time required to obtain a magnetocaloric 1:13 phase. The microstructure and phase compositions of both the as-cast and the annealed samples are analyzed by X-ray diffraction and electron microscopy. We show that suction casting and melt spinning lead to a significant reduction of the annealing time from 7 days (conventionally cast samples) to 3 days and 1 day, respectively, to obtain the 1:13 phase as a major phase. In these samples, a magnetic entropy change of ∆SM = 11 and 8 J/kg·K, respectively, is achieved in the vicinity of TC.

Source: Material Design & Processing Communications

DOI: 10.1002/mdp2.96

Authors: Gaurav Potnis, Maria Krautz, Anja Waske, Jayanta Das, Juergen Eckert

Institutions: Indian Institute of Technology Kharagpur, Leibniz Institute for Solid State and Materials Research, Federal Institute For Materials Research and Testing, Montanuniversität Leoben

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze