Temperature stability of SmCo（2:17） magnets modified by Ni-Cr two-layer coating
来源期刊：Rare Metals2019年第3期
论文作者：Saira Bibi Jing-Min Wang M. Faisal Rathore Cheng-Bao Jiang
文章页码：238 - 244
摘 要：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 NiCr-modified magnets oxidized at high temperature（500 ℃） in air for 200 h. The oxidation test results illustrate that the mass gain of uncoated magnet is6.95 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.
Saira Bibi1，Jing-Min Wang1，M. Faisal Rathore2，Cheng-Bao Jiang1
1. School of Materials Science and Engineering,Beihang University2. National Center of Physics,Quaid-e-Azam University
摘 要：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 NiCr-modified magnets oxidized at high temperature（500 ℃） in air for 200 h. The oxidation test results illustrate that the mass gain of uncoated magnet is6.95 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.
关键词：
