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Title: | Structure and magnetic properties of chill-cast and melt-spun Ndx(Fe3Al)100-x and Nd33(FeyAl)67 alloys | Authors: | Si, L. Ding, J. Li, Y. Yao, B. |
Keywords: | Chill-cast rod Magnetic properties Melt-spun ribbon Mössbauer study |
Issue Date: | 2001 | Citation: | Si, L.,Ding, J.,Li, Y.,Yao, B. (2001). Structure and magnetic properties of chill-cast and melt-spun Ndx(Fe3Al)100-x and Nd33(FeyAl)67 alloys. Materials Transactions 42 (4) : 664-669. ScholarBank@NUS Repository. | Abstract: | The magnetic properties of chill-cast Nd-Fe-Al rods have been studied as a function of Nd and Al concentrations. High coercivities were obtained in Nd60(Fe3Al)40, Nd50(Fe3Al)50 and Nd33(Fe10Al)67 alloys. The study on the melt-spun ribbons of these alloys has shown that coercivity is dependent on the quenching rate, and high coercivity could only be obtained in alloys prepared after a relatively low quenching rate. Several crystalline Nd-Fe-Al phases have been investigated in this work. A metastable tetragonal phase existed as nearly the single phase in Nd33(FeyAl)67 with y = 2-4. The tetragonal phase is antiferromagnetic with a Néel temperature of 260 K. Metamagnetism and magnetoresistivity have been observed. The study on the annealed Nd33(FeAl)67 alloy has shown that a hexagonal phase and an unknown were formed and these two Fe-containing phases, among which one is an antiferromagnetic with a Néel temperature of 280 K and the another is ferromagnetic below 130-140 K. | Source Title: | Materials Transactions | URI: | http://scholarbank.nus.edu.sg/handle/10635/107208 | ISSN: | 13459678 |
Appears in Collections: | Staff Publications |
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