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Rare Metals
Published in: Rare Metals 3/2019

04-07-2018

Temperature stability of SmCo (2:17) magnets modified by Ni–Cr two-layer coating

Authors: Saira Bibi, Jing-Min Wang, M. Faisal Rathore, Cheng-Bao Jiang

Published in: Rare Metals | Issue 3/2019

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Abstract

The oxidation resistance behavior of SmCo (2:17)-type high-temperature magnets modified with Ni–Cr two-layer coating was studied. The study depicts the mass gain kinetics and magnetic properties of uncoated and Ni–Cr-modified magnets oxidized at high temperature (500 °C) in air for 200 h. The oxidation test results illustrate that the mass gain of uncoated magnet is 6.95 mg·cm−2 which is more than that (0.08 mg·cm−2) of coated magnet after 200 h. For the magnetic properties concerned, there is a great loss for uncoated magnet, while for coated magnet, magnetic properties do not change much. The study of uncoated magnet through X-ray diffraction (XRD) and electron probe microanalysis (EPMA) shows that the invasion of oxygen at high temperature leads to the loss of magnetic properties by changing the microstructure of magnet.
previous article Grain growth behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy during isothermal β heat treatments
next article Production of glass–ceramics using Municipal solid waste incineration fly ash

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Metadata
Title
Temperature stability of SmCo (2:17) magnets modified by Ni–Cr two-layer coating
Authors
Saira Bibi
Jing-Min Wang
M. Faisal Rathore
Cheng-Bao Jiang
Publication date
04-07-2018
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 3/2019
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-018-1076-0

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