Diffusion-controlled nanocrystallization of the Fe73.5Cu1Nb3Si15.5B7 Finemet amorphous alloy

被引：0

作者：

Ribeiro, R. M. ^{[1
]}

de Biasi, R. S. ^{[2
]}

dos Santos, D. R. ^{[3
]}

dos Santos, D. S. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, COPPE, PEMM, POB 68505, BR-21945970 Rio de Janeiro, Brazil

[2] Inst Militar Engenharia, Rio De Janeiro, Brazil

[3] Uiversidade Estadual Norte Fluminense, Goitacazes, Brazil

来源：

METASTABLE AND NANOSTRUCTURED MATERIALS III | 2008年 / 570卷

关键词：

crystallization; amorphous alloys;

D O I：

10.4028/www.scientific.net/MSF.570.120

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crystallization of the amorphous metallic alloy Fe-73.5 Cu1Nb3 Si-8.5 B-14 was investigated by ferromagnetic resonance (FMR), small angle in situ X-ray scattering (SAXS/WAXS) and differential scanning calorimetry (DSC). Only one crystalline phase was observed by WAXS and only one peak was observed by DSC. The activation energies, calculated from FMR and DSC data, were 287 kJ.mol(-1) and 313.4 kJ.mol(-1), respectively. The values calculated for the Avrami exponent were 0.98 (FMR) and 1.4 (DSC). These values correspond to different mechanisms of nucleation and growth; however, the SAXS/WAXS results suggest that the dominant mechanisms are nucleation and growth of crystals from small dimensions.

引用

页码：120 / +

页数：2

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