Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-19T17:33:26.141Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural Relationships between QC and Meta-stable Crystalline Phases in Melt Spun Zr80Pt20 Ribbons

Published online by Cambridge University Press:  01 February 2011

X. Y. Yang ,
M. J. Kramer ,
E. A. Rozhkova  and
D. J. Sordelet
X. Y. Yang
Affiliation:
Materials and Engineering Physics Program, Ames Laboratory (USDOE), Iowa State University, Ames, Iowa 50011
M. J. Kramer
Affiliation:
Materials and Engineering Physics Program, Ames Laboratory (USDOE), Iowa State University, Ames, Iowa 50011
E. A. Rozhkova
Affiliation:
Materials and Engineering Physics Program, Ames Laboratory (USDOE), Iowa State University, Ames, Iowa 50011
D. J. Sordelet
Affiliation:
Materials and Engineering Physics Program, Ames Laboratory (USDOE), Iowa State University, Ames, Iowa 50011
Get access

Abstract

Two competing meta-stable crystalline phases, a bcc hyperstoichiometric β-Zr(Pt) (Im3m) superstructure and a non-stoichiometric fcc ε-Zr6Pt3O (Fd3m) phase, have been observed to coexist with a quasicrystalline (i) phase, respectively, in as-spun Zr80Pt20 ribbons with low oxygen content (184ppm mass O) and high oxygen content (4737 ppm mass O). Transmission electron microscopy (TEM) results show that the β-Zr(Pt) superstructure and i phase have a well defined orientational relationship, good crystallographic match and nearly identical stoichiometry. Icosahedral two-fold axes coincide with <110>, <111>, <112> and <113> axes in β-Zr(Pt); {110}β-Zr planes register with icosahedral {211111} fivefold or {221001} twofold planes. The observed orientational relationship and the space group (Im3m) preclude β-Zr(Pt) as a cubic approximant to the i phase. Both β-Zr(Pt) and the i phase are distorted; β-Zr(Pt) maintains a basic β-Zr Bravais lattice with an aperiodic superlattice. Morphologies suggest that the i phase forms first, followed by an easy nucleation of the β-Zr(Pt) on the surfaces of the i phase. Also, a similar orientational relationship and lattice match between ε-Zr6Pt3O and i phase has been revealed by TEM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 805: Symposium LL – Quasicrystals , 2003 , LL7.8
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Saida, J., Matsushita, M. and Inoue, A., Appl. Phys. Lett. 73, 77, 2000.Google Scholar
[2] Murty, B. S., Ping, D. H., Ohnuma, M. and Hono, K., Acta. Mater. 49, 3453, 2001.Google Scholar
[3] Saida, J., Matsushita, M. and Inoue, A., J. Appl. Phys. 90, 4717, 2001.Google Scholar
[4] Sordelet, D. J., Yang, X. Y., Rozhkova, E., Besser, M. F., Kramer, M. J., Appl. Phys. Lett. 82, 69, 2003.Google Scholar
[5] Yang, X. Y., Kramer, M. J., Rozhkova, E. A. and Sordelet, D. J., Scripta Mater. 49, 885, 2003.Google Scholar
[6] Dong, C., Chattopadhyay, K. and Kuo, K. H., Scripta Mater. 21, 1307, 1987.Google Scholar
[7] Singh, A., Tsai, A. P., Script. Mater. 49, 143, 2003.Google Scholar
[8] International, Hahn T. Tables for Crystallography, Vol. A, International Union of Crystallography. London: Kluwer Academic Publishers; 1996. p. 878.V.Google Scholar
[9] Elser, , Henley, C. L., Phys. Rev. B23, 2883, 1985.Google Scholar
[10] Goldman, A. I., Kelton, K. F.. Rev. Mod. Phys. 65, 213, 1993.Google Scholar
[11] Takakura, H., Guo, J. Q. and Tsai, A. P., Phil. Mag. Lett. 81, 411, 2001.Google Scholar