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Gutfleish, O. and Harris, I.R. (1998) Hydrogen Assisted Processing of Rare-Earth Permanent Magnets. Fifteenth International Workshop on Rare-Earth Magnets and Their Applications, Dresden, September 1998, 487.

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• TITLE: Evaluation of Mean Crystallite Size on Magnetic Powder by Scanning Electron Microscopy and Synchrotron Diffractometry

  AUTHORS: Eguiberto Galego, Marilene Morelli Serna, Rubens Nunes de Faria Junior

  KEYWORDS: Rare Earth Alloys, Magnetic Powders, Hydrides, Synchrotron Radiation

  JOURNAL NAME: Materials Sciences and Applications, Vol.5 No.8, June 27, 2014

  ABSTRACT: This paper presents the results of investigations carried out with Pr-based magnetic powders. The magnetically hard powders were produced from homogenised alloys using a high temperature hydrogen pulverization process. Alloys and powders were investigated by scanning electron microscopy and by energy dispersive X-ray analysis. Mean crystallite size of the pulverized material was estimated using synchrotron powder diffractometry and the Scherrer method. A comparison between these two investigation techniques has been carried out. The effects of copper on the properties of the magnetic powders have been studied. It has been shown that the addition of this alloying element had a marked effect on the microstructure of the powders.