Structure and magnetic properties of mechanically alloyed Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} and the magnetostriction of its epoxy composites

Journal Article · Sun May 15 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1851751· OSTI ID:20711665

Liu, J J; Ren, W J; Zhao, X G; Liu, W; Zhang, Z D ^[1]

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1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, and International Centre for Materials Physics, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China)

The C15 Laves phase with composition Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} has been synthesized by mechanical alloying and subsequent annealing process. The structure and magnetic properties of Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} have been investigated. The effect of the annealing on the magnetic properties has been studied. The samples annealed at 773 K are found to have a coercivity of 6.66 kOe at room temperature. The coercivity decreases monotonically with increase in the annealing temperature. The epoxy/Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} composites have been produced by a cold compression-molding technique. The magnetostriction of the epoxy/Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} composites with different weight ratios of epoxy resin to powder is measured by a standard strain technique. The Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} composites, with a weight ratio of epoxy resin to powder of 5:100, have a high magnetostriction of 810 ppm, at an applied magnetic field of 12 kOe. The Tb{sub 0.7}Pr{sub 0.3}(Fe{sub 0.9}B{sub 0.1}){sub 1.93} alloy combines a high magnetostriction with a low coercivity, which is a promising magnetostrictive material.

• OSTI ID: 20711665
• Journal Information: Journal of Applied Physics, Vol. 97, Issue 10; Conference: 49. annual conference on magnetism and magnetic materials, Jacksonville, FL (United States), 7-11 Nov 2004; Other Information: DOI: 10.1063/1.1851751; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BORON ALLOYS
COERCIVE FORCE
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
EPOXIDES
FERROMAGNETIC MATERIALS
HYSTERESIS
IRON ALLOYS
LAVES PHASES
MAGNETIC FIELDS
MAGNETOSTRICTION
MOLDING
PHASE TRANSFORMATIONS
POWDERS
PRASEODYMIUM ALLOYS
RESINS
STRAINS
TEMPERATURE RANGE 0273-0400 K
TERBIUM ALLOYS