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Glass Forming and Crystallization Behavior of (Fe1−xy Co x Ni y )72Cr15Zr10 W 3 Alloys

  • W. Li
  • Y. Z. YangEmail author
Original Paper
  • 101 Downloads

Abstract

Metalloid-free (Fe1−xy Co x Ni y )72Cr15Zr10 W 3 (x, y = 0, 0.25) alloys were synthesized by a rapid quenching technique at the surface velocity of the cooper roller of 40 m/s. Glass-forming ability, crystallization kinetics, and saturation magnetization of the amorphous ribbons were analyzed by XRD, differential scanning calorimetry, and VSM. Results show that only (Fe0.5Co0.25Ni0.25)72Cr15Zr10 W 3 has an amorphous structure with ΔT x = 39 K. The saturation magnetization (M s) is 49.2 emu/g, and coercivity (H c) is as low as 5.0 A/m. The apparent activation energies of the alloys were calculated to be E x (K) = 331.8 kJ/mol and E p (K) = 255.5 kJ/mol, respectively, by using the Kissinger and Ozawa plot method. The high activation energy of crystallization implies that the atomic diffusion in the (Fe0.5Co0.25Ni0.25)72Cr15Zr10 W 3 alloy system is difficult, demonstrating that the obtained amorphous ribbon exhibits high thermal stability. With the increase of heating rates, the crystallization characteristic temperatures increase correspondingly. After annealing, the crystallization process of the amorphous ribbon was the eutectic crystallization method for the multi-crystalline precipitation.

Keywords

Amorphous ribbon Heating rate Crystallization behavior Activation energy Annealing 

Notes

Acknowledgments

This work was supported by the Specialized Research Fund for the Doctoral Program of Higher Education (No. 20124420110007) and the Demonstration Dase Fund for Joint Training Graduate of Guangdong Province (No. 2013JDXM27)

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Faculty of Materials and EnergyGuangdong University of TechnologyGuangzhouChina

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