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Fe-based bulk metallic glasses with diameter thickness larger than one centimeter

Published online by Cambridge University Press:  03 March 2011

V. Ponnambalam ,
S. Joseph Poon  and
Gary J. Shiflet
V. Ponnambalam
Affiliation:
Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714
S. Joseph Poon
Affiliation:
Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714
Gary J. Shiflet*
Affiliation:
Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904-4745
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Fe–Cr–Mo–(Y,Ln)–C–B bulk metallic glasses (Ln are lanthanides) with maximum diameter thicknesses reaching 12 mm have been obtained by casting. The high glass formability is attained despite a low reduced glass transition temperature of 0.58. The inclusion of Y/Ln is motivated by the idea that elements with large atomic sizes can destabilize the competing crystalline phase, enabling the amorphous phase to be formed. It is found that the role of Y/Ln as a fluxing agent is relatively small in terms of glass formability enhancement. The obtained bulk metallic glasses are non-ferromagnetic and exhibit high elastic moduli of approximately 180–200 GPa and microhardness of approximately 13 GPa.

Keywords

CastingMetallic glassCalorimetry
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1320 - 1323
Copyright
Copyright © Materials Research Society 2004

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References

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