Characteristic free volumes of bulk metallic glasses: Measurement and their correlation with glass-forming ability

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3549819· OSTI ID:21538145

Qiang, Hu ^[1]; Xierong, Zeng ^[2]; Fu, M W ^[3]

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1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072 (China)
2. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060 (China) and Shenzhen Key Laboratory of Special Functional Materials, Shenzhen 518060 (China)
3. Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)

A convenient method is proposed for the measurement of the characteristic free volumes, viz., the amount of excess free volume annihilation in structural relaxation V{sub f-sr} and the amount of new free volume production in glass transition V{sub f-gt} of bulk metallic glasses (BMGs) by thermal dilation (DIL) test. Through the DIL tests, the characteristic free volumes are found to be sensitive to the change of glass forming ability (GFA). The Pd{sub 40}Cu{sub 30}Ni{sub 10}P{sub 20} BMG has a quite small V{sub f-sr}. For a series of Fe-Cr-Mo-C-B-(Er) BMGs, Fe{sub 48}Cr{sub 15}Mo{sub 14}C{sub 15}B{sub 6}Er{sub 2} with the largest GFA is identified to have the largest V{sub f-gt} and smallest V{sub f-sr}. The correlation between V{sub f-sr} and the squares of critical diameters of these iron-based BMGs can be fitted as a negative exponential function with high accuracy.

• OSTI ID: 21538145
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 5; Other Information: DOI: 10.1063/1.3549819; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACCURACY
ALLOY-MO99
ANNIHILATION
BORON ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
COPPER ALLOYS
CORRELATIONS
ERBIUM ALLOYS
IRON ALLOYS
METALLIC GLASSES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PALLADIUM ALLOYS
PEPTIDES
PHOSPHORUS COMPOUNDS
RELAXATION
SIMULATION
ALLOYS
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INTERACTIONS
MATERIALS
MOLYBDENUM BASE ALLOYS
ORGANIC COMPOUNDS
PARTICLE INTERACTIONS
PLATINUM METAL ALLOYS
PROTEINS
RARE EARTH ALLOYS
TITANIUM ADDITIONS
TITANIUM ALLOYS
TRANSITION ELEMENT ALLOYS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS