Static measurements for A- and B-relaxation below Tg in a Zr55Cu30Ni5Al10BMG

Osami Haruyama; Hiroyuki Sawada; Kazuhiro Yoshikawa; Tohru Kawamata; Yoshihiko Yokoyama; Kazumasa Sugiyama

doi:10.1002/9781118663547.ch35

Static measurements for A- and B-relaxation below T_g in a Zr₅₅Cu₃₀Ni₅Al₁₀BMG

Osami Haruyama, Hiroyuki Sawada, Kazuhiro Yoshikawa, Tohru Kawamata, Yoshihiko Yokoyama, Kazumasa Sugiyama

Materials Development Division

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

The static A- and B-relaxation in a Zr₅₅Cu₃₀Ni₅Al₁₀ bulk metallic glass (BMG) was investigated by volume relaxation. The relaxation time _A for A-relaxation was well fitted by Vogel-Fulcher-Tammann (VFT) equation. The manifestation of B-relaxation in a lower temperature region was confirmed by isochronal change in electrical resistance, and its kinetics was examined by isothermal change in volume during relaxation. The kinetics was characterized by a pre-exponential factor of _B,0=1.4×l0^-11 s and an activation energy of E_B=160 kJ/mol≈2 8.0 RT_g. The x-ray analysis with a synchrotron radiation revealed that the structural change was different from that of B-relaxation of metallic glasses with the trend of the chemical short range ordering (CSRO) process.

Original language	English
Title of host publication	TMS 2013 142nd Annual Meeting and Exhibition, Annual Meeting
Publisher	Wiley-Blackwell
Pages	273-280
Number of pages	8
ISBN (Electronic)	9781118663547
ISBN (Print)	9781118605813
DOIs	https://doi.org/10.1002/9781118663547.ch35
Publication status	Published - 2013 Jan 1

Keywords

Bulk metallic glass
Mode coupling
Structural relaxation
Volume relaxation

ASJC Scopus subject areas

Engineering(all)
Materials Science(all)

Access to Document

10.1002/9781118663547.ch35

Cite this

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title = "Static measurements for A- and B-relaxation below Tg in a Zr55Cu30Ni5Al10BMG",

abstract = "The static A- and B-relaxation in a Zr55Cu30Ni5Al10 bulk metallic glass (BMG) was investigated by volume relaxation. The relaxation time A for A-relaxation was well fitted by Vogel-Fulcher-Tammann (VFT) equation. The manifestation of B-relaxation in a lower temperature region was confirmed by isochronal change in electrical resistance, and its kinetics was examined by isothermal change in volume during relaxation. The kinetics was characterized by a pre-exponential factor of B,0=1.4×l0-11 s and an activation energy of EB=160 kJ/mol≈2 8.0 RTg. The x-ray analysis with a synchrotron radiation revealed that the structural change was different from that of B-relaxation of metallic glasses with the trend of the chemical short range ordering (CSRO) process.",

keywords = "Bulk metallic glass, Mode coupling, Structural relaxation, Volume relaxation",

author = "Osami Haruyama and Hiroyuki Sawada and Kazuhiro Yoshikawa and Tohru Kawamata and Yoshihiko Yokoyama and Kazumasa Sugiyama",

year = "2013",

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doi = "10.1002/9781118663547.ch35",

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T1 - Static measurements for A- and B-relaxation below Tg in a Zr55Cu30Ni5Al10BMG

AU - Haruyama, Osami

AU - Sawada, Hiroyuki

AU - Yoshikawa, Kazuhiro

AU - Kawamata, Tohru

AU - Yokoyama, Yoshihiko

AU - Sugiyama, Kazumasa

PY - 2013/1/1

Y1 - 2013/1/1

N2 - The static A- and B-relaxation in a Zr55Cu30Ni5Al10 bulk metallic glass (BMG) was investigated by volume relaxation. The relaxation time A for A-relaxation was well fitted by Vogel-Fulcher-Tammann (VFT) equation. The manifestation of B-relaxation in a lower temperature region was confirmed by isochronal change in electrical resistance, and its kinetics was examined by isothermal change in volume during relaxation. The kinetics was characterized by a pre-exponential factor of B,0=1.4×l0-11 s and an activation energy of EB=160 kJ/mol≈2 8.0 RTg. The x-ray analysis with a synchrotron radiation revealed that the structural change was different from that of B-relaxation of metallic glasses with the trend of the chemical short range ordering (CSRO) process.

AB - The static A- and B-relaxation in a Zr55Cu30Ni5Al10 bulk metallic glass (BMG) was investigated by volume relaxation. The relaxation time A for A-relaxation was well fitted by Vogel-Fulcher-Tammann (VFT) equation. The manifestation of B-relaxation in a lower temperature region was confirmed by isochronal change in electrical resistance, and its kinetics was examined by isothermal change in volume during relaxation. The kinetics was characterized by a pre-exponential factor of B,0=1.4×l0-11 s and an activation energy of EB=160 kJ/mol≈2 8.0 RTg. The x-ray analysis with a synchrotron radiation revealed that the structural change was different from that of B-relaxation of metallic glasses with the trend of the chemical short range ordering (CSRO) process.

KW - Bulk metallic glass

KW - Mode coupling

KW - Structural relaxation

KW - Volume relaxation

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