Melt-spun hard magnetic three-phase nanocrystalline Nd{sub 5}Fe{sub 78.5}B{sub 16.5} alloy

Journal Article · Fri Jul 23 00:00:00 EDT 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(99)00092-5· OSTI ID:691351

Akhtar, D; Mather, R P ^[1]; Ruediger, A; Koester, U ^[2]

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1. Defence Metallurgical Research Lab., Hyderabad (India)
2. Univ. of Dortmund (Germany). Dept. of Chemical Engineering

The aim of the present work was to prepare a three-phase nanocomposite containing high saturation {alpha}-Fe and Fe{sub 3}B soft phases and the Nd{sub 2}Fe{sub 14}B hard magnetic phase. The requirements for the microstructure of an exchange coupled material are a very fine and homogeneous grain size distribution and substantial absence of any intergranular phase. Since the crystallization of amorphous alloy is a multistage process, coarsening of the phase crystallizing in the first stage may occur till completion of the crystallization process, leading to deterioration in coercivity. The effect of annealing treatment on the intrinsic coercivity was therefore determined. Results of these investigations are reported in this paper.

• OSTI ID: 691351
• Journal Information: Scripta Materialia, Vol. 41, Issue 4; Other Information: PBD: 23 Jul 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MICROSTRUCTURE
MAGNETIC PROPERTIES
CRYSTALLIZATION
ANNEALING
NEODYMIUM ALLOYS
IRON ALLOYS
BORON ALLOYS
INTERMETALLIC COMPOUNDS
CALORIMETRY
MICROSCOPY