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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Microstructure and magnetic properties ofrapidly solidified Sm(CobalFe0.11Cu0.10Zrx)7 alloys
LI Li-ya(李丽娅), YI Jian-hong(易健宏), GE Yi-cheng(葛毅成)

State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:Effects of Zr content on the structural, morphological, and magnetic properties of rapidly quenched Sm(CoFe0.11Cu0.10Zrx)7 (x=0−0.04) alloys were investigated. The Zr-free ribbon crystallizes with the 1׃7H structure as a major phase while the ribbons with Zr addition adopts the 2׃17R structure type. The ribbons with x=0.03 exhibits a highest coercivity, Hci=933.7 kA/m, because a smaller uniform cellular structure along with a lamellar phase is formed. The decrease of Hci above x>0.03 is mainly related to the formation of 2׃7 phase.

 

Key words: rapid solidification; annealing; coercivity; nanocrystalline microstructure; SmCo

ISSN 1672-7029
CN 43-1423/U

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