Compositional evolution and magnetic properties of nanocrystalline Fe81.5Cu0.5Mo0.5P12C3Si2.5

Autor:	Z. X. Xu, Tao Liu, Y. F. Gao, Z. T. Zhao, Ruzhang Ma
Rok vydání:	1996
Předmět:	Materials science Amorphous metal Annealing (metallurgy) Metallurgy Analytical chemistry General Physics and Astronomy Coercivity Microstructure Nanocrystalline material Grain size law.invention law Crystallization Solid solution
Zdroj:	Journal of Applied Physics. 80:3972-3976
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.363355
Popis:	The amorphous alloy Fe81.5P12C3Cu0.5Mo0.5Si2.5 has been prepared and the crystallized alloy exhibits an ultrafine structure with a grain size of about 20 nm and excellent soft magnetic properties. The coercivity and the core loss as low as 6.7 A/m, 0.26 W/kg, respectively, and the maximum permeability as high as 10.2×104 at an optimal annealing temperature of about 360 °C were obtained. By means of x‐ray diffraction, transmission electron microscope, and Mossbauer spectroscopy measurements, microstructures of the alloy were investigated as a function of the annealing temperature. The primary crystallization produces ultrafine grains of α‐Fe(Si) solid solution with a grain size of about 20 nm precipitated in the residual amorphous matrix. The Si in the α phase was estimated near to be completely disorder ranged and the Si concentration was determined to be about 2%–5%. The Fe3P phase appears in the residual amorphous phase upon annealing at 420 °C.
Databáze:	OpenAIRE
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