NDLI: Predicting Pathways for Synthesis of Ferromagnetic τ Phase in Binary Heusler Alloy Al-55 pct Mn Through Understanding of the Kinetics of ε

Content Provider	Springer Nature Link
Author	Palanisamy, Dhanalakshmi Singh, Shailesh Srivastava, Chandan Madras, Giridhar Chattopadhyay, Kamanio
Copyright Year	2016
Abstract	This paper outlines the detailed procedure for the synthesis of pure ferromagnetic τ phase in binary Heusler Al-55 pct Mn alloy in bulk form through casting route without any addition of stabilizers. To obtain the processing domain for the formation of the τ phase from high-temperature ε phase, isothermal transformation experiments were carried out. The structure and microstructure were characterized by X-ray diffraction and electron microscopy studies. The τ phase start times were obtained through magnetic measurements. In order to tune the casting conditions for the formation of this phase, thermal modeling was carried out to predict the heat extraction rates for copper molds of different diameters (2 to 12 mm) containing hot solids during casting process. This enabled us to estimate the diameter of the mold to be used for obtaining τ phase directly during casting. It was concluded through experimental verification that 10-mm-diameter casting in copper mold is suitable to obtain complete τ phase. A saturation magnetization of 116 emu/g at 10 K was measured for such samples. The Curie point for the τ phase was found to be 668 K (395 °C). Additionally, the cast rod exhibits a compressive strength of 1170 MPa which is higher than those of both ferrites and AlNiCo magnets.
Starting Page	6555
Ending Page	6568
Page Count	14
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	47
Issue Number	12
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2016-09-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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