Heterogeneous nucleation in a glass-forming alloy

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2948861· OSTI ID:939410

Wall, J. J. ^[1]; Liu, Chain T ^[2]; Rhim, W. K. ^[3]; Li, J. J. Z. ^[3]; Liaw, Peter K ^[4]; Choo, H. ^[4]; Huang, B. Y. ^[5]; Johnson, W. L. ^[3]

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1. Los Alamos National Laboratory (LANL)
2. ORNL
3. California Institute of Technology, Pasadena
4. University of Tennessee, Knoxville (UTK)
5. Central South University, China

Nucleation in the undercooled liquid state in the bulk metallic glass-forming composition Zr{sub 52.5}Cu{sub 17.9}Ni{sub 14.6}Al{sub 10}Ti{sub 5} (VIT-105), produced using high purity (PA) and commercial purity (CA) raw materials was investigated using electrostatic levitation and ex situ neutron diffraction. The CA material was observed to have a lower density than the PA sample and crystallized at relatively shallow undercooling. The densities of the samples at temperatures above the solidus showed an oxygen-dependent hysteresis associated with the state change, indicating the presence of oxygen-stabilized intermetallics. The PA alloy exhibited three distinct crystallization modes dependent on the thermal history of the melt, one of which showed a net volume expansion.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 939410
• Journal Information: Applied Physics Letters, Vol. 92, Issue 24; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
METALLIC GLASSES
ZIRCONIUM ALLOYS
COPPER ALLOYS
NICKEL ALLOYS
ALUMINIUM ALLOYS
TITANIUM ALLOYS
NUCLEATION
DENSITY
INTERMETALLIC COMPOUNDS