Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-07T14:25:52.429Z Has data issue: false hasContentIssue false
  • English
  • Français

Phase Separation and Crystallization in the Bulk Amorphous Alloy Zr41Ti14Cu12.5Ni10Be22.5

Published online by Cambridge University Press:  21 February 2011

M.-P. Macht ,
N. Wanderka ,
A. Wiedenmann ,
H. Wollenberger ,
Q. Wei ,
S.G. Klose ,
A. Sagel  and
H.J. Fecht
M.-P. Macht
Affiliation:
Hahn -Meitner-Institut Berlin, Glienickerstr.100, D-14109 Berlin, FRG
N. Wanderka
Affiliation:
Hahn -Meitner-Institut Berlin, Glienickerstr.100, D-14109 Berlin, FRG
A. Wiedenmann
Affiliation:
Hahn -Meitner-Institut Berlin, Glienickerstr.100, D-14109 Berlin, FRG
H. Wollenberger
Affiliation:
Hahn -Meitner-Institut Berlin, Glienickerstr.100, D-14109 Berlin, FRG
Q. Wei
Affiliation:
University Potsdam, Inst.Berufspädagogik, D-14109-Golm, FRG
S.G. Klose
Affiliation:
Technical University Berlin, Institute of Metals Research, Hardenbergstr. 36 PN 2–3, D-10623 Berlin
A. Sagel
Affiliation:
Technical University Berlin, Institute of Metals Research, Hardenbergstr. 36 PN 2–3, D-10623 Berlin
H.J. Fecht
Affiliation:
Technical University Berlin, Institute of Metals Research, Hardenbergstr. 36 PN 2–3, D-10623 Berlin
Get access

Abstract

The decomposition and crystallization above the glass temperature of the bulk metallic glass Zr41Ti14Cu12.5Ni10Be22.5 and the crystallization during solidification of the melt were investigated by means of different analytical methods, including Transmission Electron Microscopy (TEM), Small Angle Neutron Scattering (SANS), Field Ion Microscopy with Atom Probe (FIM/AP).

Dependent on the thermal history these phase transitions lead to different phases and different microstructures of the alloy. During annealing above the glass tremperature the decomposition of the alloy into two supercooled liquid phases is observed by the formation of nanosized precipitates, which differ from the matrix by their Be and Ti contents. This decomposition retards significantly the subsequent crystallization, however it does not inhibit the formation of the phases which crystallize if the decomposition is bypassed by appropriate heat treatment. By stepwise crystallization a nanosized microstructure is formed consisting of three metastable phases and of stable Zr2Cu. This microstructure differ significantly from the crystalline equilibrium microstructure resulting from slow cooling of the melt. Crystallization of the amorphous alloy by very fast heating causes totally different microstructures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 375
Copyright
Copyright © Materials Research Society 1998

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 Zhang, T., Inoue, A. and Masumuto, T., J.Non Crystalline Solids 156–158, p.473 (1993).Google Scholar
2 Zhang, T., Inoue, A. and Masumuto, T., Mater.Trans.JIM 36, p.391 (1995).Google Scholar
3 Johnson, W.L. and Peker, A., Appl.Phys.Lett. 63, p.2342 (1993).Google Scholar
4 Fecht, H.J., Mater.Trans.JIM, 36, 777 (1995)Google Scholar
5 Johnson, W.L., “proceedings of ISMANAM 95”, 7.25.-8.28.1995, Quebec,Kanada, Trans Tech Publications, in press.Google Scholar
6 Schneider, S., Thiyagarajan, P. and Johnson, W.L., will appear in Appl.Phys.Lett.Google Scholar
7 Inoue, A., Chen, S. and Masumuto, T., Mater. Sci.Engin. A179/A180, p.346 (1994).Google Scholar
8 Macht, M.-P., Wanderka, N., Wiedenmann, A., Wollenberger, H., Wei, Q., Fecht, H.J. and Klose, S., as ref. 5.Google Scholar
9 Wiedenmann, A., Keiderling, U., Macht, M.-P. and Wollenberger, H., as ref. 5.Google Scholar
10 Mühlhausen, D., Schubert-Bischoff, P., Wei, Q. and Macht, M.-P., proceedings of the European Metallographic Conference and Exhibition, Friedrichshafen, FRG, 9.13.–15. 1995, Informationsgesellschaft MBH Verlag, Oberursel, FRG, in press.Google Scholar
11 Klose, S., thesis, Technical University Berlin, 1995.Google Scholar
12 Kim, Y.J., Busch, R., Johnson, W.L., Rulison, A.J. and Rhim, W.K., Appl.Phys.Lett. 65(17), p.2136 (1994).Google Scholar
13 Woychik, C.G. and Massalski, T.B., Z.Metallkunde, 79, p.149 (1988).Google Scholar
14 Grime, R., Oehring, M., Wagner, R. and Haasen, P., in Rapidly Quenched Metals, edited by Steeb, S. and Warlimont, H., North Holland Physics Publishing, Amsterdam 1985, p 761.Google Scholar
15 Klose, S., Macht, M.-P. and Fecht, H.-J., as ref. 5.Google Scholar