NDLI: Magnetic Properties of Mechanically Alloyed and Annealed Powders Fe$_{100

Content Provider	Springer Nature Link
Author	Ul'yav, A. I. Elsukov, E. P. Zagaiv, A. V. Arsent'eva, N. B. Dorofeev, G. A. Fomin, V. M.
Copyright Year	2003
Abstract	The effect of the structural state and the phase composition on the magnetic hysteresis properties of Fe(95)C(5) and Fe(85)C(15) powders after mechanical alloying and annealing is investigated. It is shown that in the initial stage of grinding in a ball planetary mill the coercive force of the Fe–C powders is determined by the degree of defectiveness of the α-Fe phase and the relative volume and dimensions of nonmagnetic graphitic inclusions in iron powder particles. As the grinding time increases, the α-Fe phase goes over into a nanostructure state and carbon from graphite inclusions goes over into an amorphous Am(Fe–C) phase. After annealing on the temperature interval 300–600°C, the amorphous Am(Fe–C) phase is transformed into Fe$_{3}$C ferric carbide. The coercive force of the Fe$_{3}$C phase strongly depends on the degree of distortion of its crystal lattice and amounts to ∼ 80 A/cm for the phase with distorted lattice and ∼ 240 A/cm for the phase with equilibrium undistorted lattice. The magnetic characteristics of the powder after mechanical alloying and subsequent annealing are determined by the type, amount, and structural state of the phases containing in the samples.
Starting Page	683
Ending Page	696
Page Count	14
File Format	PDF
ISSN	10618309
Journal	Russian Journal of Nondestructive Testing
Volume Number	39
Issue Number	9
e-ISSN	16083385
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Materials Science Mechanical Engineering

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