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Home > Issues > SearchEffect of Peritectic Banded Structure on Magnetic Properties of SmCo5 Sintered Magnets
Journal of Magnetics, Volume 25, Number 4, 31 Dec 2020, Pages 469-474
Saleem Akhtar (School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST)), A. Nusair Khan * 
(Ibn-e-Sina Institute of Technology), Mushtaq Khan (School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST)), Syed Husain Imran Jaffery (School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST)), Arslan Saleem (School of Mechanical Engineering & IEDT, Kyungpook National University)
(Ibn-e-Sina Institute of Technology), Mushtaq Khan (School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST)), Syed Husain Imran Jaffery (School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST)), Arslan Saleem (School of Mechanical Engineering & IEDT, Kyungpook National University)
Abstract
SmCo5 is well known for its high coercivity. However, still room is available to increase the coercive power of
SmCo5, since the theoretical values of the compound is far higher than the achieved values. Different attempts,
in this regard, have been made either by controlling the microstructure or the chemical composition. However,
it is noted that no or very few literature is available regarding the control of microstructure through solidification.
Three types of SmCo5 compound were prepared through induction melting technique so that final solidification
be manipulated by controlling the mold temperature. Fractrographic analysis revealed a unique
peritectic structure in SmCo5 compound. It was observed that the peritectic plates, having nano-size thickness,
remain present even after high temperature sintering operation. The nano-scale peritectic plates may affect the
final magnetic properties, especially the coercivity of the subject compound.
SmCo5, since the theoretical values of the compound is far higher than the achieved values. Different attempts,
in this regard, have been made either by controlling the microstructure or the chemical composition. However,
it is noted that no or very few literature is available regarding the control of microstructure through solidification.
Three types of SmCo5 compound were prepared through induction melting technique so that final solidification
be manipulated by controlling the mold temperature. Fractrographic analysis revealed a unique
peritectic structure in SmCo5 compound. It was observed that the peritectic plates, having nano-size thickness,
remain present even after high temperature sintering operation. The nano-scale peritectic plates may affect the
final magnetic properties, especially the coercivity of the subject compound.
Keywords: SmCo5; Peritectic reaction; high coercivity
DOI: https://doi.org/10.4283/JMAG.2020.25.4.469
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