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Applied Physics Letters / Volume 74 / Issue 5 / CONDENSED MATTER: STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 74, 664 (1999); http://dx.doi.org/10.1063/1.122980 (3 pages)

High-strength materials produced by precipitation of icosahedral quasicrystals in bulk Zr–Ti–Cu–Ni–Al amorphous alloys

L. Q. Xing, J. Eckert, W. Löser, and L. Schultz

IFW Dresden, Institut für Metallische Werkstoffe, Postfach 270016, D-01171 Dresden, Germany

(Received 2 October 1998; accepted 25 November 1998)

Zr62−xTixCu20Ni8Al10 (3 ⩽ x ⩽ 5) amorphous alloys crystallize via precipitation of icosahedral quasicrystals in the primary crystallization step, leading to nano-sized quasicrystals embedded in an amorphous matrix. Ti is the decisive component favoring the precipitation of quasicrystals. The mechanical properties of the crystallized alloys with different amounts of quasicrystalline phase were measured by compression and bending tests. If the volume fraction of quasicrystalline precipitates is below about 50%, the strength increases with an increasing amount of quasicrystalline precipitates, but the ductility does not decrease significantly in comparison with the amorphous counterpart. The fracture stress reaches 1835 MPa for 50 vol % of quasicrystals. Quasicrystalline precipitates of more than 60 vol % lead to reduction of ductility and strength. This shows a way of producing bulk quasicrystalline materials of high strength by crystallization of bulk amorphous alloys. © 1999 American Institute of Physics.

© 1999 American Institute of Physics

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KEYWORDS and PACS

Keywords

zirconium alloys, titanium alloys, copper alloys, nickel alloys, aluminium alloys, amorphous state, precipitation, quasicrystals, crystallisation, ductility, mechanical strength, fracture

PACS

  • 64.75.-g

    Phase equilibria

  • 61.44.Br

    Quasicrystals

  • 81.40.Lm

    Deformation, plasticity, and creep

  • 81.40.Np

    Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure

  • 81.30.Mh

    Solid-phase precipitation

  • 61.43.Dq

    Amorphous semiconductors, metals, and alloys

  • 62.20.F-

    Deformation and plasticity

  • 62.20.M-

    Structural failure of materials

  • 64.70.K-

    Solid-solid transitions

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.122980

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    C. Janot, Phys. Rev. B 53, 181 (1996).

    S. J. Poon, A. J. Drehman, and K. R. Lawless, Phys. Rev. Lett. 55, 2324 (1985).

    U. Köster, J. Meinhardt, S. Roos, and H. Liebertz, Appl. Phys. Lett. 69, 179 (1996)APPLAB000069000002000179000001.

    P. A. Bancel, P. A. Heiney, P. W. Stephens, A. I. Goldman, and P. M. Horn, Phys. Rev. Lett. 54, 2422 (1985).

    F. E. Luborsky and J. L. Walter, J. Appl. Phys. 47, 3648 (1976)JAPIAU000047000008003648000001.


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