CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
Prev
Next
|
|
|
Thermal expansion behavior of sintered Nd-Fe-B magnets with different Co contents and orientations |
Rui-Yang Meng(孟睿阳), Ji-Yuan Xu(徐吉元), Jia-Teng Zhang(张家滕), Jing Liu(刘静), Yi-Kun Fang(方以坤), Sheng-Zhi Dong(董生智)†, and Wei Li(李卫) |
Division of Functional Material, Central Iron&Steel Research Institute, Beijing 100081, China |
|
|
Abstract The thermal expansion behavior of sintered Nd-Fe-B magnets is a crucial parameter for production and application. However, this aspect has not been thoroughly investigated. In this study, three different sintered Nd-Fe-B magnets with varying Co content (m Co=0, 6, 12 wt%) were prepared using the conventional powder metallurgy method, and four magnets oriented under different magnetic fields were prepared to compare. The thermal expansion behavior for the magnets was investigated using a linear thermal dilatometry in the temperature range of 20 ℃-500 ℃. It was found that, the coefficient of thermal expansion (CTE) increases with the increase of Co contents, while the anisotropy of thermal expansion decreases. The introduction of Co leads to continuous changes from negative to positive thermal expansion in the vertically oriented direction, which is important for the development of zero thermal expansion magnets. The thermal expansion of non-oriented magnets was found to be isotropic. Additionally, the anisotropy of thermal expansion increases with the increase of orientation degree. These results have important implications for the development of sintered Nd-Fe-B with controllable CTE.
|
Received: 22 November 2022
Revised: 03 March 2023
Accepted manuscript online: 31 March 2023
|
PACS:
|
65.40.De
|
(Thermal expansion; thermomechanical effects)
|
|
75.50.Ww
|
(Permanent magnets)
|
|
61.30.Gd
|
(Orientational order of liquid crystals; electric and magnetic field effects on order)
|
|
77.80.bg
|
(Compositional effects)
|
|
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2021YFB3502900) and the National Natural Science Foundation of China (Grant No. 51871063), the Key Technology Research and Development Program of Shandong Province, China (Grant No. 2019JZZY020210), and the Major Projects in Inner Mongolia Autonomous Region, China. |
Corresponding Authors:
Sheng-Zhi Dong
E-mail: dong_shengzhi@163.com
|
Cite this article:
Rui-Yang Meng(孟睿阳), Ji-Yuan Xu(徐吉元), Jia-Teng Zhang(张家滕), Jing Liu(刘静), Yi-Kun Fang(方以坤), Sheng-Zhi Dong(董生智), and Wei Li(李卫) Thermal expansion behavior of sintered Nd-Fe-B magnets with different Co contents and orientations 2023 Chin. Phys. B 32 056501
|
[1] Sagawa M, Fujimura S, Togawa N, Yamamoto H and Matsuura Y 1984 J. Appl. Phys. 55 2083 [2] Sagawa M, Fujimura S, Yamato H, et al. 1984 IEEE Trans. Magn. 20 1584 [3] Wang X C, Yue M, Zhang D T, Liu W Q and Zhu M G 2020 Rare Metals 39 1145 [4] Wang X, Zhao Z R, Liu F, Liu Y L, Wang G F, Zhu M G and Zhang X F 2020 Rare Metals 39 36 [5] GB/T 13560-2017. Sintered neodymium iron boron permanent magnets. [6] Cheng DX 2017 Handbook of mechanical design, 6th edn. (Chemical Industry Press) p. 479 (in Chinese) [7] GB/T 32286.1-2015 Soft magnetic alloys-Part 1: Nickel-iron alloys [8] GB/T 14986.3-2018 Soft magnetic alloys-Part 3: Iron-cobalt alloys [9] GB/T 14986.4-2018 Soft magnetic alloys-Part 4: Iron-chromium alloys [10] GB/T 14986.5-2018 Soft magnetic alloys-Part 5: Iron-aluminum alloys [11] Luo C, Qiu X, Wang H, et al. 2021 Journal of Manufacturing Processes. 64 323 [12] Sun T, Zhu J and Wang D 1979 Acta Metallurgica Sinica 15 58 (in Chinese) [13] Ishimoto F, Yamamoto K and Takahashi W 1996 Journal of the Japan Society of Powder and Powder Metallurgy 43 940 [14] Buschow K 1986 Journal of the Less-Common Metals 118 349 [15] Givord D, Li H, Moreau J, et al. 1986 J. Magn. Magn. Mater. 54-57 445 [16] Yang N, Dennis K, Mccallum R, et al. 2005 J. Magn. Magn. Mater. 295 65 [17] Fujii H, Nagata H, Uwatoko Y, et al. 1987 J. Magn. Magn. Mater. 70 331 [18] Teplykh A E, Chukalkin Y, Lee S, Bogdanov S G, Kudrevatykh N V, Rosenfeld E V, Skryabin Yu N, Choi Y, Andreev A V and Pirogov A N 2013 J. Alloys Compd. 581 423 [19] Andreev A V 1990 Journal of the Less Common Metals. 162 33 [20] Qiao Y, Song Y, Xu M, et al. 2019 Inorganic Chemistry Frontiers. 6 3225 [21] Gao W, Wang S, Sun M, et al. 2020 Journal of the Chinese Society of Rare Earth 38 460 (in Chinese) [22] Herbst J 1991 Rev. Modern Phys. 63 819 [23] Matsuura Y, Hirosawa S, Yamamoto H, et al. 1985 Appl. Phys. Lett. 46 308 [24] Herbst J and Yelon W 1987 J. Appl. Phys. 60 4224 [25] Popov A, Kolodkin D, Gaviko V, et al. 2017 Physics of Metals and Metallography 118 935 |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|