Coercivity enhancement in Pr‐Fe‐B magnets with small additions of Cu and Zn

Autor:	G. C. Hadjipanayis, Yong Zhang, L. Withanawasam
Rok vydání:	1991
Předmět:	Materials science Magnet Metallurgy Analytical chemistry General Physics and Astronomy Grain boundary Melt spinning Coercivity Microstructure Grain size
Zdroj:	Journal of Applied Physics. 70:6450-6452
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.349927
Popis:	Addition of small amounts of Cu and Zn was found to enhance the coercivity Hc of Pr‐Fe‐B melt‐spun magnets. 1.5% Cu addition increases the coercivity by 6 kOe over the Cu free value of 18 kOe while 3% Zn increases Hc by 8 kOe. Both of the additions cause a reduction in grain size, and lead to disturbed lattice planes at grain boundaries and to thin PrCu(Zn) layers which are partially surrounding the 2:14:1 grains. The enhancement in coercivity is believed to be the result of these microstructural changes at the grain boundaries.
Databáze:	OpenAIRE
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