Acta Metall Sin  1990, Vol. 26 Issue (4): 148-152    DOI:

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BOUNDARY MICROSTRUCTURE AND MAGNETIC HARDENING OF SINTERED NdFeB MAGNET

ZHOU Shouzeng;TANG Weizhong;WANG Run University of Science and Technology Beijing associate professor;Department of Materials Science;University of Science and Technology Beijing; Beijing 100083

ZHOU Shouzeng;TANG Weizhong;WANG Run University of Science and Technology Beijing associate professor;Department of Materials Science;University of Science and Technology Beijing; Beijing 100083. BOUNDARY MICROSTRUCTURE AND MAGNETIC HARDENING OF SINTERED NdFeB MAGNET. Acta Metall Sin, 1990, 26(4): 148-152.

Abstract References Related Articles Recommended Metrics Download:  PDF(1372KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The boundary microstructure of the sintered alloy Nd_(15.5)Fe_(77)B_(7.5) hasbeen studied by TEM, ASE and SAED. It may distinguish the boundaries into 4types. The first three types remain the same during annealing, and the 4th changesits microstructure remarkably. The 4th type of boundary microstructure is composedof two different regions, i. e., the central Nd-rich phase and the epitaxial layer ofthe Nd_2Fe_(14)B grains. Owing to the atomic diffusion and other types of masstransport,magnetic hardening occurred in the epitaxial layers, thus the coercivity of the alloywill be improved. Key words:  NdFeB magnet      microstructure      coercivity      Received:  18 April 1990      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1990/V26/I4/148 1 Durst K D, Kronmuller H. J Magn Magn Mater, 1987; 68: 63 2 Fidler J. IEEE Trans Magn, 1985; MAG--21: 1955; Proc 5th Int Symposium on MAC, 1987: 363 3 Hiraga K, Hirabayoshi M, Sagawa, M, Matsuura Y. Jpn J Appl Phys, 1985; 24(1) : L30 4 Sagawa M, Fujimura S, Yamamoto H, Matsuura Y, Hiraga K. IEEE Trans Magn, 1984; MAG 20: 1584 5 Tokunaga M, Tobise M, Meguro N, Harada H. IEEE Trans Magn, 1986; MAG-22: 904 6 Hiraga K, Hirabayashi M, Sagawa M, Matsuura Y. Jpn J Appl Phys, 1985; 24: 699 7 Schrey P. IEEE Trans Magn, 1986; MAG-22: 913 8 Ramesh R, Chen J K, Thomas G. J Appl Phys, 1987; 61: 2993 9 Ramesh R, Krishnan K M, Goo E, Thomas G, Okada M, Homma M. J Magn Magn Mater. 1986; 54--57: 563 10 车广灿,梁敬魁,王选章,中国科学,A辑,1985;(10) :909 11 Schneider G, Ernst-Theo Henig, Stadelmaier H H, Petzow G. Proc 5th Int Symposium MAC, 1987: 347 12 Sagawa M, Fujimura S, Togawa N, Yamamoto H, Matsuura Y. J Appl Phys, 1984; 55: 2083X [1] GONG Shengkai, LIU Yuan, GENG Lilun, RU Yi, ZHAO Wenyue, PEI Yanling, LI Shusuo. Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys[J]. 金属学报, 2023, 59(9): 1097-1108. [2] ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing. Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800oC[J]. 金属学报, 2023, 59(9): 1253-1264. [3] LU Nannan, GUO Yimo, YANG Shulin, LIANG Jingjing, ZHOU Yizhou, SUN Xiaofeng, LI Jinguo. Formation Mechanisms of Hot Cracks in Laser Additive Repairing Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1243-1252. [4] WANG Lei, LIU Mengya, LIU Yang, SONG Xiu, MENG Fanqiang. 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