Optimization of ZrTiCuNiBe Metallic Bulk Glass Composition

  1. Prof. J. V. Wood3,
  2. Prof. Dr. L. Schultz4 and
  3. Prof. Dr. D. M. Herlach5
  1. M.-P. Macht1,
  2. N. Wanderka1,
  3. I. Sieber1 and
  4. Q. Wei2

Published Online: 25 APR 2006

DOI: 10.1002/3527607277.ch2

Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8

Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8

How to Cite

Macht, M.-P., Wanderka, N., Sieber, I. and Wei, Q. (2000) Optimization of ZrTiCuNiBe Metallic Bulk Glass Composition, in Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8 (eds J. V. Wood, L. Schultz and D. M. Herlach), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607277.ch2

Editor Information

  1. 3

    University of Nottingham, Division of Materials, Nottingham NG7 2RD, United Kingdom

  2. 4

    Institut für Festkorper- und Werkstofforschung Dresden e.V., Postfach 270016, 01171 Dresden, Germany

  3. 5

    Deutsches Zentrum für Luft- und Raumfahrt e.V., Linder Hohe, 51170 Köln, Germany

Author Information

  1. 1

    Hahn-Meitner-Institut Berlin, Germany

  2. 2

    Max-Planck-Institut für Mikrostrukturphysik Halle, Germany

Publication History

  1. Published Online: 25 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301935

Online ISBN: 9783527607273

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Keywords:

  • ZrTiCuNiBe bulk glasses;
  • optimization of composition

Summary

ZrTiCuNiBe bulk glasses are suitable for near net shaping of machine parts by forging in the low viscous state above the glass transition. However, the quality of the glass will be degraded by primary crystals formed during the glass production by fast cooling of the liquid melt. Quantity, size and morphology of these primary crystals depend on the cooling rate and on small variations of the alloy composition. In order to optimize the ZrTiCuNiBe alloy to get stable bulk glasses with a minimum of primary crystals, the composition, structure, morphology and frequency of primary crystals in different ZrTiCuNiBe-bulk glasses, produced under the same conditions are compared with the phases, which crystallize during very slow cooling of the liquid melt. Glasses with higher Be-content showed improved thermal stability but contained always more primary crystals. In Be-rich glasses primary crystals of the slightly modified Be2Zr-phase are observed. This phase is the relevant phase of the Zr-Be boundary system of the quasi-ternary (ZrTi)-(CuNi)-Be system. The same phase develops during slow cooling of the liquid melt at the beginning of the crystallization sequence. Be seems to play a key role for the crystallization behavior, i.e. for the glass forming ability and the stability of the ZrTiCuNiBe-bulk glasses.