Crystallization kinetics and soft magnetic properties in metalloid-free (Fe, Co)90Zr10 amorphous and nanocrystalline alloys

[摘要] Microstructure and magnetic properties of metalloid-free (Fe100-xCox)(90)Zr-10 amorphous and nanocrystalline alloys were characterized. Devitrification of these amorphous alloys occurs in two overlapped transformations leading to the formation of alpha-Fe(Co) and Fe(Co)Zr-2 phases. Constant local Avrami exponents have been found for each individual process. Although Co-free alloy shows a larger grain size, crystalline fractions are similar for both alloys after equivalent annealing. Good soft magnetic properties at room temperature have been observed for amorphous and nanocrystalline alloy with x = 30, which exhibits an amorphous Curie temperature of 735 K. The x = 0 amorphous alloy is paramagnetic at room temperature and nanocrystalline samples exhibit a transition to superparamagnetic behavior. (C) 2014 Elsevier B.V. All rights reserved.

[发布日期] 2014-12-05

[效力级别]  Proceedings Paper

[关键词] Soft magnetic alloys;Amorphous and nanocrystalline alloys;Crystallization kinetics