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Plasticity of bulk metallic glasses improved by controlling the solidification condition

Published online by Cambridge University Press:  31 January 2011

Z.W. Zhu ,
S.J. Zheng ,
H.F. Zhang ,
B.Z. Ding ,
Z.Q. Hu ,
P.K. Liaw ,
Y.D. Wang  and
Y. Ren
Z.W. Zhu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
S.J. Zheng*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
H.F. Zhang
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
B.Z. Ding
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Z.Q. Hu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
P.K. Liaw
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996-2200
Y.D. Wang
Affiliation:
School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
Y. Ren
Affiliation:
Experimental Facilities Division, Advanced Phonon Source, Argonne National Laboratory, Argonne, Illinois 60439
*
a)Address all correspondence to this author. e-mail:[email protected]
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Abstract

Different bulk metallic glasses (BMGs) were prepared in ductile Cu47.5Zr47.5Al5, Zr62Cu15.4Ni12.6Al10, and brittle Zr55Ni5Al10Cu30 alloys by controlling solidification conditions. The achieved microstructures were characterized by x-ray diffraction, differential scanning calorimetry, transmission electron microscopy, and synchrotron- based high-energy x-ray diffraction. Monolithic BMGs obtained by high-temperature injection casting are brittle, while BMGs bearing some nanocrystals with the size of 3 to 7 nm and 2 to 4 nm, obtained by low-temperature injection casting and in situ suction casting, respectively, exhibit good plasticity. It indicates that the microstructures of BMGs are closely affected by the solidification conditions. Controlling the solidification conditions could improve the plasticity of BMGs.

Keywords

AmorphousDuctilityMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 4 , April 2008 , pp. 941 - 948
Copyright
Copyright © Materials Research Society 2008

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References

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