ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Fine magnetic powder has been produced using the hydrogenationdisproportionation desorption and recombination (HDDR) process. The first goal of this workinvolved an investigation of a range of disproportionation/desorption temperatures between800 and 900°C with the purpose of optimizing the HDDR treatment for a Pr14Fe80B6 alloy.The cast alloy was annealed at 1100°C for 20 hours for homogenization. The optimumdisproportionation temperature for achieving high anisotropy was 820°C. The influence of thereaction temperature on the microstructure and magnetic properties of Pr14Fe80B6 HDDRpowders and magnets has been shown. A second stage of this study involved thecharacterization, for each temperature, of the HDDR processed powder using X-raydiffraction analysis. Samples of the HDDR material have been studied by synchrotronradiation powder diffraction using the Rietveld method for cell refinement, phasequantification and crystallite sizes determination. Scanning electron microscopy (SEM) hasalso been employed to reveal the morphology of the HDDR powder
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.42.pdf
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