Title :
Modification of the microstructure of Nd15Fe77B8 alloy by controlled solidification
Author :
Abell, J.S. ; Harris, I.R.
Author_Institution :
Dept. of Metall. & Mater., Birmingham Univ., UK
fDate :
3/1/1988 12:00:00 AM
Abstract :
The influence of solidification behavior on the microstructure, hydrogen absorption, and magnetic domains of Nd-Fe-B alloys has been investigated. Microstructural observations on ingots of Nd-Fe-B alloys solidified by horizontal and vertical float zoning techniques have allowed the phase distribution, grain size distribution, and the nature of the solid-liquid growth interface to be studied and compared with the as-cast microstructure. The nature of hydrogen absorption as observed by DTA (differential thermal analysis) is complex but may prove to be a useful phase analysis aid as well as a decrepitation route to produce single crystals from large-grained material.
Keywords :
boron alloys; crystal microstructure; grain size; iron alloys; magnetic domains; neodymium alloys; solidification; thermal analysis; DTA; H adsorption; Nd15Fe77B8; float zoning techniques; grain size distribution; magnetic domains; microstructure; phase distribution; solid-liquid growth interface; solidification; Boats; Crystallization; Grain boundaries; Iron alloys; Microstructure; Morphology; Needles; Neodymium; Optical polarization; Shape memory alloys;
Journal_Title :
Magnetics, IEEE Transactions on
