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Crystallization of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub> from its stoichiometric melt composition

Gao, J. R. and Volkmann, T. and Yang, S. and Reutzel, S. and Herlach, D. M. and Song, X. P. (2007) Crystallization of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub> from its stoichiometric melt composition. Journal of Alloys and Compounds, 433, pp. 356-362. Elsevier. DOI: 10.1016/j.jallcom.2006.06.090.

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Abstract

Containerless solidification of gas-atomized Nd<sub>10</sub>Fe<sub>85</sub>B<sub>5</sub> melt droplets was carried out using the drop tube technique. The phase constituents and microstructure of the solidified samples were investigated by means of powder X-ray diffraction analysis, thermomagnetic analysis, and scanning electron microscopy. Besides <font face="symbol">g</font>-Fe and Nd<sub>2</sub>Fe<sub>14</sub>B, non-equilibrium phases such as Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub>, <font face="symbol">e</font>-Nd, and Nd<sub>1.1</sub>Fe<sub>4</sub>B<sub>4</sub> were identified. The microstructure of the samples was categorized into three types, including a quasi-single phase one that consists mainly of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub> dendrites. The lattice parameters and Curie temperature of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub> were determined, and compared with those of the same type phase crystallized in Nd-rich Nd-Fe-B melt compositions. The results were discussed with respect to the stoichiometry, formation as well as potential applications of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub>.

Document Type:Article
Title:Crystallization of Nd<sub>2</sub>Fe<sub>17</sub>B<sub>x</sub> from its stoichiometric melt composition
Authors:
AuthorsInstitution or Email of Authors
Gao, J. R.Northeastern University, Shenyang, China
Volkmann, T.UNSPECIFIED
Yang, S.Xi'an Jiaotong University, Xi'an, China
Reutzel, S.Ruhr-Universität Bochum
Herlach, D. M.UNSPECIFIED
Song, X. P.Xi'an Jiaotong University, Xi'an, China
Date:2007
Journal or Publication Title:Journal of Alloys and Compounds
Volume:433
DOI:10.1016/j.jallcom.2006.06.090
Page Range:pp. 356-362
Publisher:Elsevier
Status:Published
Keywords:Unterkühlung von Materialien
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Dr.rer.nat. Sven Reutzel
Deposited On:08 Jan 2008
Last Modified:12 Dec 2013 20:20

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