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Critical cooling rate and thermal stability of Fe–Co–Zr–Y–Cr–Mo–B amorphous alloy

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
407
Identifiers
DOI: 10.1016/j.jallcom.2005.06.031
Keywords
  • Bulk Metallic Glasses
  • Glass-Forming Ability
  • Thermal Stability
  • Critical Cooling Rates
  • Activation Energy

Abstract

Abstract The critical cooling rate of the Fe 61Co 5Zr 8Y 2Cr 2Mo 7B 15 bulk amorphous alloy was determined to be 37 K/s, providing an indication that this alloy has a high glass-forming ability. The non-isothermal crystallization kinetics of the Fe 61Co 5Zr 8Y 2Cr 2Mo 7B 15 amorphous alloy prepared by using the copper-mold casting or melt-spinning were also investigated. It is found that the activation energies in the non-isothermal crystallization process show a strong dependence on the cooling rates for glass formation, revealing that the melt-spun amorphous alloy has a higher thermal stability.

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