High temperature oxidation and its induced coercivity loss of a 2:17 type SmCo-based magnet

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	High temperature oxidation and its induced coercivity loss of a 2:17 type SmCo-based magnet
	X.; Peng Wang, X.; Zhao, H.; Guo, Z.; Li, W.; Wang, F.
	2015
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	117 期号:9
摘要	Oxidation has been explained as one possibility for unacceptable and irreversible coercivity loss of 2:17 type SmCo-based magnets at high temperatures over 550 degrees C, but the question for how oxidation affects coercivity in the magnet has not been fundamentally answered. In this work, oxidation and its induced degradation of the magnetic phases of a Sm(CobalFe0.22Cu0.08Zr0.02)(7.5) magnet in air at 600 degrees C have been investigated by using transmission electron microscopy and correlated with the demagnetization curves measured. It shows that the coercivity loss, which is significantly increased with oxidation time, is small and independent of time in the magnet unaffected by oxidation. The reason lies in that the 2:17 cell and 1:5 cell boundary, although they have been completely disintegrated in the oxidized part by external oxidation of Co, Fe, and Cu and internal oxidation of Sm, remains in the unoxidized part except that 1:5 boundary close to the oxidized part is decreased in thickness and Cu content. (C) 2015 AIP Publishing LLC.
部门归属	[wang, x. ; peng, x. ; zhao, h. ; wang, f.] chinese acad sci, inst met res, lab corros & protect, shenyang 110016, peoples r china. [wang, x.] univ sci & technol china, sch chem & mat sci, hefei 230026, peoples r china. [guo, zh. ; li, w.] cent iron & steel res inst, div funct mat, beijing 100081, peoples r china. ; peng, x (reprint author), univ sci & technol china, sch chem & mat sci, hefei 230026, peoples r china. ; xpeng@imr.ac.cn
关键词	2/17-type Permanent-magnets Co-cu-fe Thermal-stability Operating Temperatures Recent Progress Tm Magnets Microstructure Nitridation Behavior Alloys
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73962
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X.,Peng Wang, X.,Zhao, H.,et al. High temperature oxidation and its induced coercivity loss of a 2:17 type SmCo-based magnet[J]. Journal of Applied Physics,2015,117(9).
APA	X.,Peng Wang, X.,Zhao, H.,Guo, Z.,Li, W.,&Wang, F..(2015).High temperature oxidation and its induced coercivity loss of a 2:17 type SmCo-based magnet.Journal of Applied Physics,117(9).
MLA	X.,et al."High temperature oxidation and its induced coercivity loss of a 2:17 type SmCo-based magnet".Journal of Applied Physics 117.9(2015).