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Formation, properties, thermal characteristics, and crystallization of hard magnetic Pr–Al–Fe–Cu bulk metallic glasses

Published online by Cambridge University Press:  31 January 2011

Zheng Li
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China, and Department of Applied Sciences and Technology, College of Math & Physics, Chongqing University, Chongqing 400044, People's Republic of China
Hai Yang*
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Ming Xiang Pan
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
De Qian Zhao
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Wan Lu Wang
Affiliation:
Department of Applied Sciences and Technology, College of Math & Physics, Chongqing University, Chongqing 400044, People's Republic of China
Wei Hua Wang
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
*
a) Address all correspondence to this author. e-mail: hybai@aphy.iphy.ac.cn
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Abstract

The Pr55–xAl12+xFe33–yCuy (0 ≤ x ≤ 5, 0 ≤ y ≤ 8) bulk metallic glasses (BMGs) 5 mm in diameter and 100 mm in length were prepared by copper mold suction casting. Hysteresis loops of the Pr55–xAl12+xFe33–yCuy BMGs and the corresponding Pr55Al12Fe30Cu3 crystallized alloy were measured, and the results showed that the Pr55–xAl12+xFe33–yCuy BMGs are hard magnetic, while the completely crystallized Pr55Al12Fe30Cu3 alloy is paramagnetic at room temperature. The thermal behavior and crystallization of the Pr55Al12Fe30Cu3 BMG were studied by differential scanning calorimetry, and the results indicated that the Pr-based BMG has obvious glass transition and a wide supercooled liquid region up to 75 K. The crystallization activation energy for the Pr55Al12Fe30Cu3 BMG is much smaller than that of Zr–Ti–Cu–Ni–Be BMG.

Type
Articles
Copyright
Copyright © Materials Research Society 2003

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