Strong-Superstrong Transition in Glass Transition of Metallic Glass
WANG Dan1, PENG Hong-Yan1, XU Xiao-Yu1, CHEN Bao-Ling1, WU Chun-Lei1, SUN Min-Hua2
1Key Laboratory of New Carbon-based Functional and Super-hard Materials of Heilongjiang Province, School of Physics and Electronic Engineering, Mudanjiang Teachers College, Mudanjiang 157012 2School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025
Strong-Superstrong Transition in Glass Transition of Metallic Glass
WANG Dan1, PENG Hong-Yan1, XU Xiao-Yu1, CHEN Bao-Ling1, WU Chun-Lei1, SUN Min-Hua2
1Key Laboratory of New Carbon-based Functional and Super-hard Materials of Heilongjiang Province, School of Physics and Electronic Engineering, Mudanjiang Teachers College, Mudanjiang 157012 2School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025
摘要Dynamic fragility of bulk metallic glass (BMG) of Zr64Cu16Ni10Al10 alloy is studied by three-point beam bending methods. The fragility parameter mfor Zr64Cu16Ni10Al10 BMG is calculated to be 24.5 at high temperature, which means that the liquid is a "strong" liquid, while to be 13.4 at low temperature which means that the liquid is a "super-strong" liquid. The dynamical behavior of Zr64Cu16Ni10Al10 BMG in the supercooled region undergoes a strong to super-strong transition. To our knowledge, it is the first time that a strong-to-superstrong transition is found in the metallic glass. Using small angle x-ray scattering experiments, we find that this transition is assumed to be related to a phase separation process in supercooled liquid.
Abstract：Dynamic fragility of bulk metallic glass (BMG) of Zr64Cu16Ni10Al10 alloy is studied by three-point beam bending methods. The fragility parameter mfor Zr64Cu16Ni10Al10 BMG is calculated to be 24.5 at high temperature, which means that the liquid is a "strong" liquid, while to be 13.4 at low temperature which means that the liquid is a "super-strong" liquid. The dynamical behavior of Zr64Cu16Ni10Al10 BMG in the supercooled region undergoes a strong to super-strong transition. To our knowledge, it is the first time that a strong-to-superstrong transition is found in the metallic glass. Using small angle x-ray scattering experiments, we find that this transition is assumed to be related to a phase separation process in supercooled liquid.
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2010, Vol. 27 
