IMR OpenIR
On high-temperature oxidation and protection of 2:17-type SmCo-based magnets
Peng, Xiao; Zhao, Hongbo; Wang, Xiaolan; Guo, Zhaohui; Li, Wei; Wang, Fuhui; xpeng@imr.ac.cn
2015
发表期刊CORROSION REVIEWS
ISSN0334-6005
卷号33期号:42433页码:139-150
摘要Sm-2(Co,Cu,Fe,Zr)(17) are the best high-temperature permanent magnets because of their high Curie temperature (800 degrees C-850 degrees C). However, irreversible and unacceptable coercivity losses retard their use in applications at temperatures over 550 degrees C. The coercivity loss has been correlated with poor oxidation resistance at high temperatures. The current research progress on the effect of oxidation and its prevention, for 2:17-type magnets, is reviewed. Oxidation in air at 500 degrees C-700 degrees C causes the magnets to form three regions: (1) an external oxide scale mainly consisting of (CoxFe1-x)(3)O-4, (2) a thicker internal oxidation zone where the typical cellular precipitation (2:17R cell and 1:5H cell boundary) structure has been completely collapsed due to the Sm oxidation into Sm2O3, and (3) an oxidation-free zone where the cellular precipitates remain unchanged in lattice structure. No unacceptable coercivity loss is seen in the oxidation-free zone. Its thickness can be impressively increased within the magnets at high temperature, when they are covered with surface diffusion barriers for oxygen from the atmosphere, such as thin films of Cr2O3, Al2O3, and the metals with the ability to thermally grow these oxides.
部门归属[peng, xiao ; zhao, hongbo ; wang, xiaolan ; wang, fuhui] chinese acad sci, inst met res, lab corros & protect, shenyang 110016, peoples r china ; [guo, zhaohui ; li, wei] cent iron & steel res inst, div funct mat, beijing 100081, peoples r china
关键词Coating Coercivity High-temperature Magnet Magnetic Properties Oxidation
资助者National Basic Research Program of China, Ministry of Science and Technology [2010CB934604]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75030
专题中国科学院金属研究所
通讯作者xpeng@imr.ac.cn
推荐引用方式
GB/T 7714
Peng, Xiao,Zhao, Hongbo,Wang, Xiaolan,et al. On high-temperature oxidation and protection of 2:17-type SmCo-based magnets[J]. CORROSION REVIEWS,2015,33(42433):139-150.
APA Peng, Xiao.,Zhao, Hongbo.,Wang, Xiaolan.,Guo, Zhaohui.,Li, Wei.,...&xpeng@imr.ac.cn.(2015).On high-temperature oxidation and protection of 2:17-type SmCo-based magnets.CORROSION REVIEWS,33(42433),139-150.
MLA Peng, Xiao,et al."On high-temperature oxidation and protection of 2:17-type SmCo-based magnets".CORROSION REVIEWS 33.42433(2015):139-150.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Peng, Xiao]的文章
[Zhao, Hongbo]的文章
[Wang, Xiaolan]的文章
百度学术
百度学术中相似的文章
[Peng, Xiao]的文章
[Zhao, Hongbo]的文章
[Wang, Xiaolan]的文章
必应学术
必应学术中相似的文章
[Peng, Xiao]的文章
[Zhao, Hongbo]的文章
[Wang, Xiaolan]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。