The crystallization kinetics of melt-spun Mischmetal (MM)-FeB–(Ti, Co and Al) permanent magnets has been investigated by differential scanning calorimetry (DSC), X-ray diffractometry, electron microscopy. The activation energies obtained in this study were E = 241.12 kJ/mol, 97.00 kJ/mol, 182.93 kJ/mol, 194.00 kJ/mol for MM-FeB, MM-FeB–Ti, MM-FeB–Co–Al, MM-FeB–Al ribbons, respectively. The exothermic curve MM-FeB, MM-FeB–Co–Al, MM-FeB–Al ribbon, related to crystallization reaction is flatter and wider than that shown in a MM-FeB–Ti alloy suggesting much lower kinetics of crystallization. The crystallization rate increased by partial substitution of Ti for Fe on Mischmetal-FeB permanent magnets. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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K. Y. Ko (2004) studied this question.
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