Paper Title:
Magnetic Properties and Microstructure of Sm2Co17-Based High Temperature Permanent Magnet
  Abstract

The coercivity of Sm2Co17-based permanent magnets at high operating temperature gradually increased with increasing Cu and Zr content, but decreased as the Fe content increased. The magnet Sm(Co0.7Fe0.1Cu0.16Zr0.04)6.7 that was studied had a room temperature intrinsic coercivity of about 30 kOe. For this magnet, the temperature coefficient of coercivity RT − 500 o C β and Hci at 500oC are -0.148%/oC and 8.6kOe. The magnet is composed mainly by 2:17R cell interior, 1:5 cell boundary phase, as well as 2:17H lamellar phase. There is a maze-like domain structure in the magnet. The HRXRD evidence shows that the phase transformation at high temperature leads to the degraded magnetic properties of the magnets.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
1341-1344
DOI
10.4028/www.scientific.net/MSF.534-536.1341
Citation
J. H. Yi, L. Y. Li, Y. D. Peng, "Magnetic Properties and Microstructure of Sm2Co17-Based High Temperature Permanent Magnet", Materials Science Forum, Vols. 534-536, pp. 1341-1344, 2007
Online since
January 2007
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$32.00
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