Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition

Haruyama, Osami; Yoshikawa, Kazuyoshi; Yamazaki, Yoshikatsu; Yokoyama, Yoshihiko; Egami, Takeshi

doi:10.2320/matertrans.M2015023

Title: Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition

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Abstract

In this paper, the α-relaxation of pre-annealed Zr₅₅Cu₃₀Ni₅Al₁₀ bulk metallic glasses (BMGs) was compared with that of as-cast Zr-based BMGs including Zr₅₅Cu₃₀Ni₅Al₁₀. The α-relaxation was investigated by volume relaxation. The relaxation behavior was well described by a stretched exponential relaxation function, Φ (t) ≈ exp [ - (t/τ _α )^{^β α} ], with the isothermal relaxation time, τ_α, and the Kohlrausch exponent, β_α. The β_α exhibited the strong temperature dependence for the pre-annealed BMG, while the weak temperature dependence was visualized for the as-cast BMG similar to the dynamic relaxation. The τ_α’s were modified by Moynihan and Narayanaswamy-Tool-Moynihan methods that reduce the difference in the thermal history of sample. Finally, as a result, the relaxation kinetics in the glass resembled that of a liquid deduced from the behavior of viscosity in the supercooled liquid.

Authors:

Haruyama, Osami ^[1]; Yoshikawa, Kazuyoshi ^[2]; Yamazaki, Yoshikatsu ^[2]; Yokoyama, Yoshihiko ^[3]; Egami, Takeshi ^[4]

Tokyo Univ. of Science (Japan). Organization for Advanced Education
Tokyo Univ. of Science (Japan). Educational School of Science and Technology
Tohoku Univ., Sendai (Japan). Inst. for Materials Research
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Material Science and Engineering; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

Publication Date:: Sat Apr 25 00:00:00 EDT 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Tohoku Univ. (Japan)

OSTI Identifier:: 1185652

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Materials Transactions

Additional Journal Information:: Journal Volume: 56; Journal Issue: 5; Journal ID: ISSN 1345-9678

Publisher:: Japan Institute of Metals and Materials

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; zirconium-based bulk metallic glasses; α-relaxation; volume relaxation; static relaxation analysis

Citation Formats


                    Haruyama, Osami, Yoshikawa, Kazuyoshi, Yamazaki, Yoshikatsu, Yokoyama, Yoshihiko, and Egami, Takeshi. Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition.  United States: N. p., 2015. 
Web.  doi:10.2320/matertrans.M2015023.

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                    Haruyama, Osami, Yoshikawa, Kazuyoshi, Yamazaki, Yoshikatsu, Yokoyama, Yoshihiko, & Egami, Takeshi. Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition.  United States.  https://doi.org/10.2320/matertrans.M2015023

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                    Haruyama, Osami, Yoshikawa, Kazuyoshi, Yamazaki, Yoshikatsu, Yokoyama, Yoshihiko, and Egami, Takeshi. Sat .  
"Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition".  United States.  https://doi.org/10.2320/matertrans.M2015023.  https://www.osti.gov/servlets/purl/1185652.

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@article{osti_1185652,

  title        = {Comparison of Structural Relaxation Behavior in As-Cast and Pre-Annealed Zr-Based Bulk Metallic Glasses Just below Glass Transition},

  author       = {Haruyama, Osami and Yoshikawa, Kazuyoshi and Yamazaki, Yoshikatsu and Yokoyama, Yoshihiko and Egami, Takeshi},

  abstractNote = {In this paper, the α-relaxation of pre-annealed Zr55Cu30Ni5Al10 bulk metallic glasses (BMGs) was compared with that of as-cast Zr-based BMGs including Zr55Cu30Ni5Al10. The α-relaxation was investigated by volume relaxation. The relaxation behavior was well described by a stretched exponential relaxation function, Φ (t) ≈ exp [ - (t/τ α )β α ], with the isothermal relaxation time, τα, and the Kohlrausch exponent, βα. The βα exhibited the strong temperature dependence for the pre-annealed BMG, while the weak temperature dependence was visualized for the as-cast BMG similar to the dynamic relaxation. The τα’s were modified by Moynihan and Narayanaswamy-Tool-Moynihan methods that reduce the difference in the thermal history of sample. Finally, as a result, the relaxation kinetics in the glass resembled that of a liquid deduced from the behavior of viscosity in the supercooled liquid.},

  doi          = {10.2320/matertrans.M2015023},

  journal      = {Materials Transactions},

  number       = 5,

  volume       = 56,

  place        = {United States},

  year         = {Sat Apr 25 00:00:00 EDT 2015},

  month        = {Sat Apr 25 00:00:00 EDT 2015}

}

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