Structure of rapidly quenched (Cu0.5Zr0.5) 100-xAgx alloys (x = 0-40 at.%)

N. Mattern, J. H. Han, K. G. Pradeep, K. C. Kim, E. M. Park, D. H. Kim, Y. Yokoyama, D. Raabe, J. Eckert

研究成果: Article査読

14 被引用数 (Scopus)

抄録

The influence of Ag addition on the microstructure of rapidly quenched (Cu0.5Zr0.5)100-xAg x melts was investigated (x = 0-40 at.%). Fully glassy alloys were obtained for 0 ≤ x ≤ 20 at.% Ag, which are characterized by a homogeneous microstructure without any indication of phase separation. For 30 ≤ x ≤ 40 at.% Ag a composite structure is formed consisting of fcc-Ag nano-crystallites 5 nm in size and an amorphous matrix phase Cu40Zr40Ag 20. With higher Ag-content the volume fraction of the fcc-Ag phase becomes increased mainly due to crytal growth during quenching. The primary formation of fcc-Ag for 30 ≤ x ≤ 40 at.% Ag is confirmed by the analysis of the microstructure of mold cast bulk samples which were fully crystalline. From the experimental results we conclude that the miscibility gap of the liquid phase of the ternary Ag-Cu-Zr system may occur only for x > 40 at.% Ag. For the bulk glass forming quaternary Cu40Zr40Al 10Ag10 alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu 0.5Zr0.5)100-xAg x glasses (x = 10, 20 at.%).

本文言語English
ページ(範囲)285-290
ページ数6
ジャーナルJournal of Alloys and Compounds
607
DOI
出版ステータスPublished - 2014 9月 15

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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