Freestanding and flexible composites of magnetocaloric Gd-5(Si,Ge)(4) microparticles embedded in thermoplastic poly(methyl methacrylate) matrix

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Andrade, VM (Author) Other; Barroca, NB (Author) Other; Pires, AL (Author) Other; Belo, JH (Author) FCUP; pereira, a. m. (Author) FCUP; Pirota, KR (Author) Other; araujo, j. p. (Author) FCUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS & DESIGN

Vol. 186

ISSN: 0264-1275

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 11 Citations

Other information

Authenticus ID: P-00R-9A6

DOI: 10.1016/j.matdes.2019.108354

Abstract (EN): The implementation of processed magnetic materials onto thermoplastics can be an approach for practical use of brittle intermetallic materials on device development with the advantage of enlarging the range of applications. In this paper, we present the evaluation on the effect of blending magnetocaloric Gd5Si2.4Ge1.6 3.4 mu m particles with in different weight fractions onto a flexible, transparent and non-magnetic poly(methyl methacrylate) (PMMA). A close to homogeneous grain distribution along the polymer surface were achieved by using a simple solvent casting method for their magnetocaloric properties studies. From XRD analysis, it was found a unit cell volume shrinkage by increasing the powder concentration followed by a reduction on the amount of secondary monoclinic phase as a result of interfacial interactions. As a consequence, a weakening of secondary phases effect on the composite magnetocaloric behavior is observed as a result of the effective hydrostatic pressure from the difference between thermal expansions of matrix and filler. (c) 2019 The Authors. Published by Elsevier Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9