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Coercivity variations with Pr- and Zr-substituted NdDyFeB-based HDDR powdersMcGuiness, Paul J. ...As part of an industry-based project, we studied the effects of Pr and Zr substitutions to a basic Nd15DyFe76B8 material. We processed the materials using a conventional ... hydrogenation-disproportionation-desorption-recombination (HDDR) process and a simple rotary-pump vacuum; however, we also experimented with high-vacuum conditions in order to see what effect these had. The Pr and Zr substitutions were observed to have a positive and cost-effective influence on the coercivity of the processed powders: the optimum Pr substitution was the replacement of three-quarters of the neodymium, and for Zr, a much smaller 0.1 at% was found to be the best. Microstructural observations of the as-cast structures revealed significant differences between the Zr- and Pr-substituted materials and the additive-free NdDyFeB alloy, but post-HDDR microstructures were all very similar and provided little help for optimizing the processing conditions. By combining the substitutions of Prand Zr in a relatively rare-earth-rich alloy, we were able to produce a coercive powder of >1000 kA/m and have a process which can now be quickly and easily transferred to the factory.Source: Journal of Magnetism and Magnetic Materials. - ISSN 0304-8853 (Vol. 237, 2001, str. 267-275)Type of material - article, component partPublish date - 2001Language - englishCOBISS.SI-ID - 16334887
Author
McGuiness, Paul J. |
Kobe, Spomenka |
Škulj, Irena, 1972- |
Bollero, A. |
Gutfleisch, O. |
Devlin, E. J. |
Niarchos, D.
Topics
HDDR |
coercivity |
zirconium |
praseodymium
source: Journal of Magnetism and Magnetic Materials. - ISSN 0304-8853 (Vol. 237, 2001, str. 267-275)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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McGuiness, Paul J. | 18594 |
Kobe, Spomenka | 04355 |
Škulj, Irena, 1972- | 26192 |
Source: Personal bibliographies
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