Viscous Flow Behaviors of Supercooled Liquids of Pre-Annealed Zr55Cu30Al10Ni5 Bulk Metallic Glasses

Tohru Yamasaki; S. Maeda; Takeyuki Kikuchi; Takeshi Fukami; Yoshihiko Yokoyama; Tokujiro Yamamoto; Hisamichi Kimura; Akihisa Inoue

doi:10.4028/www.scientific.net/MSF.561-565.1271

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Viscous Flow Behaviors of Supercooled Liquids of...

Viscous Flow Behaviors of Supercooled Liquids of Pre-Annealed Zr₅₅Cu₃₀Al₁₀Ni₅ Bulk Metallic Glasses

Abstract:

Viscous flow behavior in supercooled liquid region of as-cast and pre-annealed Zr55Cu30Al10Ni5 bulk metallic glasses has been examined by using a penetration viscometer under high-speed heating rate of 20, 200 and 400 °C/min. Applied load for the cylindrical-shaped penetration indenter with a diameter of 1 mm was varied from 0.049 N to 0.294 N. Viscosity was quite independent of these applied loads. By pre-annealing the bulk metallic glasses at 400 °C, the density of the glasses increased, while the viscosity and the activation energy for viscous flow in their soopercooled liquid decreased with the pre-annealing treatments. Corresponding measurements of the differential thermal calorimetry (DSC) have been also done.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

1271-1274

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.1271

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Online since:

October 2007

Authors:

Tohru Yamasaki, S. Maeda, Takeyuki Kikuchi, Takeshi Fukami, Yoshihiko Yokoyama, Tokujiro Yamamoto, Hisamichi Kimura, Akihisa Inoue

Keywords:

Bulk Metallic Glass (BMG), Pre-Annealing, Supercooled Liquid, Viscosity, Zr₅₅Cu₃₀Al₁₀Ni₅

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References

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