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Synthesis and Magnetic Properties of tau-MnAlC Powders

Title
Synthesis and Magnetic Properties of tau-MnAlC Powders
Author
김종렬
Keywords
MnAlC; Melt-Spinning; Permanent Magnet; AL-C MAGNETS; NANOCOMPOSITE MAGNET; ALLOYS
Issue Date
2015-11
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 15, No. 11, Page. 8735-8738
Abstract
In order to improve the hard magnetic properties of MnAl alloy, it is critical to fabricate fine tau phase MnAl powders. In addition, a rapid cooling process and an addition of stabilization elements are required to fabricate a homogeneous phase because a tau phase is a metastable structure. In this study, tau-Mn54Al46-xCx (x = 0, 1, 2) powders were prepared by melt-spinning and subsequent annealing and milling processes. As a result, a main phase was revealed as a high temperature a phase in melt spun MnAl ribbons. And a subsequent annealing in the temperature range of 450-650 degrees C resulted in the formation of a tau phase. A maximum saturation magnetization (M-s) value of 96.56 emu/g was obtained when the melt-spun tau-Mn54Al44C2 ribbons were annealed at 500 degrees C for 10 min. However, a milling process increased the coercivity up to 3804 Oe but simultaneously reduced M-s down to 60.34 emu/g.
URI
http://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000011/art00070https://repository.hanyang.ac.kr/handle/20.500.11754/101929
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2015.11500
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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