Growth of single crystal Terfenol-D crystals

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02825703· OSTI ID:7006456

Verhoeven, J D; Gibson, E D; McMasters, O D; Baker, H H

Rods of the highly magnetostrictive material, Terfenol-D, Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/, have been prepared by both Bridgman and float zone techniques. It is found that the dendritic growth front consists of parallel sheets of dendrites growing with a primary direction <112> and sheet planes of /111/. Unseeded rods show a strong preference for <112> alignment of the grains. Seeding experiments have been successful for <112> orientations but not <111>, and the cause of this difference is discussed. The <112> single crystal rods are seen to contain parallel /111/ twin boundaries throughout their volume, growing near the central plane of the dendrite sheets. These results are analogous to those of Ge and Si. The role of the twin planes on domain wall motion and methods of eliminating the twins are discussed.

• Research Organization: Dept. of Materials Science and Engineering, Iowa State Univ., Ames, IA (US)
• OSTI ID: 7006456
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 18A:2; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals &amp; Alloys-- Preparation &amp; Fabrication
ALLOYS
BRIDGMAN METHOD
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
CRYSTAL STRUCTURE
CRYSTALS
DYSPROSIUM ALLOYS
GRAIN ORIENTATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETOSTRICTION
MELTING
MICROSTRUCTURE
MONOCRYSTALS
ORIENTATION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RODS
TERBIUM ALLOYS
ZONE MELTING