Optimum Zr-Al-Co bulk metallic glass composition Zr53Al 23.5Co23.5

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

37 Scopus Citations
View graph of relations

Author(s)

  • X. F. Zhang
  • Y. M. Wang
  • J. B. Qiang
  • Q. Wang
  • D. H. Wang
  • D. J. Li
  • C. Dong

Detail(s)

Original languageEnglish
Pages (from-to)1275-1278
Journal / PublicationIntermetallics
Volume12
Issue number10-11 SPEC. ISS.
Publication statusPublished - Oct 2004

Abstract

Composition criteria based on conduction electron concentration (e/a) have been applied for the bulk metallic glass (BMG) formation in the Zr-Al-Co system. In the phase diagram, three e/a-constant phases AlCo, ZrAlCo and pure Zr constitute a straight line with constant e/a= 1.5. Three e/a-variant lines were constructed by linking three specific compositions, Zr78.5Co 21.5, Zr70.5Al29.5 and Zr9Co 4, to the third elements. The former two compositions correspond to deep eutectics of the binary subsystems while the latter to the basic icosahedral cluster composition of the TJ2Ni-type Zr2Co phase. Easy BMO formation was found in the e/a-constant and the (Zr 9Co4)-Al e/a-variant alloy series, while the alloys in the two deep eutectic related composition lines have weaker glass forming abilities (GFAs). BMGs with diameter of 3 mm are obtained along the (Zr 9Co4-Al composition line within an e/a span of 1.3-1.5, and their thermal stabilities and GFAs increase with the e/a ratios. This e/a-variant line intersects the e/a-constant line at the composition Zr 53Al23.5Co23.5, which has the highest thermal stability and GFA, characterized by thermodynamic parameters Tg=783 K, Tx = 849 K, Tg/Tl = 0.590 and γ=0.404. © 2004 Eisevier Ltd. All rights reserved.

Research Area(s)

  • B. Alloy design, C. Casting

Citation Format(s)

Optimum Zr-Al-Co bulk metallic glass composition Zr53Al 23.5Co23.5. / Zhang, X. F.; Wang, Y. M.; Qiang, J. B.; Wang, Q.; Wang, D. H.; Li, D. J.; Shek, C. H.; Dong, C.

In: Intermetallics, Vol. 12, No. 10-11 SPEC. ISS., 10.2004, p. 1275-1278.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review