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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.49  No.6 (2008)  >  pp.1415-1418

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Undercooling Solidification and Magnetic Properties of Pr90Fe10 Alloy Produced by the Gas Flow Levitation Method

Shuji Azumo1), Hiroshi Yonemura1) and Katsuhisa Nagayama1)
1) Department of Materials Science, Faculty of Engineering, Shibaura Institute of Technology

The magnetic properties and amorphous formation ability of Pr-based alloys have been reported and discussed. In this paper, Pr90Fe10 alloys were studied to reveal the solidification behavior associated with undercooling, magnetic properties of the metastable phase, and relation between undercooling and metastable phase formation by using the gas flow levitation method. The samples were solidified at various cooling rates from approximately 50 K/s to approximately 270 K/s. Undercooling increased with the cooling rate. According to the results of the SEM-EDS analysis, the Pr90Fe10 samples that solidified at high undercooling conditions in eutectic reactions consist of the primary α-Pr, eutectic α-Pr, and metastable phases whereas the samples that solidified at low undercooling conditions in eutectic reactions consist of the primary α-Pr, eutectic α-Pr, and Pr2Fe17 phases. Additionally, the magnetic properties changed due to the undercooling.

containerless process, praseodymium-iron alloys, undercooling, metastable phase, high coercivity

Received: November 16, 2007
Accepted: March 21, 2008 , Published online: May 25, 2008
Copyright (c) 2008 The Japan Institute of Metals



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