Nanocrystallization kinetics of amorphous Fe73.5Cu1Nb3−xMoxSi13.5B9 (x=1, 2, 3) alloys
| Autor: | J. Liu, Zhi-dong Xiang, Jun Yuan, Zhihong Lu, Zhanghua Gan, Deng-jing Wang, Ying Wang, J.S. Chen, Y.P. Xu, Y. Li, R.W. Wang |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Amorphous metal Annealing (metallurgy) Alloy Analytical chemistry engineering.material Condensed Matter Physics Grain size Electronic Optical and Magnetic Materials law.invention Amorphous solid Differential scanning calorimetry law engineering Electrical and Electronic Engineering Melt spinning Crystallization |
| Zdroj: | Physica B: Condensed Matter. 405:3555-3559 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2010.05.039 |
| Popis: | Amorphous ribbons of the alloy Fe73.5Cu1Nb3−xMoxSi13.5B9 (x=1, 2, 3) were prepared by the standard single copper wheel melt spinning technique in air atmosphere. The isothermal annealing was carried out at 550, 570 and 590 °C for 1 h in a vacuum furnace to study the effect of annealing temperature on the formation of nanocrystallite in as-spun ribbons. The X-ray diffraction (XRD) technique was used to analyse the grain size of the crystalline phase in the annealed samples. It was found that for samples annealed at 590 °C for 1 h, the average grain size increased from 13 nm for the sample with x=1 to 16 nm for the sample with x=3. The primary crystallization kinetics of amorphous ribbons was analyzed by non-isothermal differential scanning calorimetry (DSC) measurements. The crystallization activation energies of amorphous ribbons calculated by using Kissinger model were 347, 297 and 326 kJ/mol for x=1, 2 and 3, respectively. The calculated Avrami exponents n were 1.95, 2.14 and 2.00 for x=1, 2 and 3, respectively. The crystallization mechanism for the non-isothermal primary crystallization of the amorphous ribbons was discussed. |
| Databáze: | OpenAIRE |
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