Compositional dependence of the viscosity of Zr-Cu-Al alloys in the supercooled liquid state

Masahiro Yamada, Yosuke Tanimoto, Tohru Yamasaki, Takeyuki Kikuchi, Yoshihiko Yokoyama, Akihisa Inoue

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Zr50Cu50-xAlx (X = 2 to 16) and Zr 90-YCuYAl10 (Y = 30 to 45) bulk metallic glasses (BMGs) have been prepared by tilt casting techniques. The viscosity of the supercooled liquids has been measured by using a penetration viscometer with a column-shaped tungsten indenter with 0.5mm in diameter and an applied load of 0.020N at a high-speed heating at a rate of 400K/min in a highly-purified He-gas atmosphere. In the Zr50Cu50-xAlx (X = 2 to 16) system, the viscosity of the supercooled liquids exhibited almost the same values when the Al-content was increased from 2 to 10 at %. When the Al-content increased to 12 at. %, the viscosity of the supercooled liquids increased largely. A large amount of the ZrCu (B2) phase after crystallization of this BMG system was detected when the Al-content was 10 at % and below. While, when the Al-content was increased to 12 at %, the main precipitation phase was changed to the ZrCu (B 19') phase. Similar increase in the viscosity of the Zr90-YCuYAl10 (Y = 30 to 45) supercooled liquids was also observed when the Cu-content was increased from 30 to 45 at. %. This may be due to the strong relationships between the compositional dependence of structure and the viscosity of the supercooled liquids in these BMG systems.

本文言語English
ページ(範囲)124-129
ページ数6
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
59
2
DOI
出版ステータスPublished - 2010 2月

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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