Indications for a fragile-to-strong transition in the high- and low-temperature viscosity of the Fe43Cr16Mo16C15B10 bulk metallic glass-forming alloy

2017 ◽  
Vol 111 (26) ◽  
pp. 261902 ◽  
Author(s):  
Benedikt Bochtler ◽  
Oliver Gross ◽  
Ralf Busch
Keyword(s):  
Low Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Glass Forming ◽  
Strong Transition

Strong Liquid Behavior of Zr-Ti-Cu-Ni-Be Bulk Metallic Glass Forming Alloys

1996 ◽  
Vol 455 ◽  
Author(s):  
Ralf Busch ◽  
Andreas Masuhr ◽  
Eric Bakke ◽  
William L. Johnson
Keyword(s):  
Glass Transition ◽  
Melting Point ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Supercooled Liquid ◽  
Glass Transition Region ◽  
Glass Forming ◽  
Liquid Behavior ◽  
Metallic Liquids ◽  
Microscopic Origin

ABSTRACTThe viscosities of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 and the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass forming liquids was determined from the melting point down to the glass transition in the entire temperature range of the supercooled liquid. The temperature dependence of the viscosity in the supercooled liquid obeys the Vogel-Fulcher-Tammann (VFT) relation. The fragility index D is about 20 for both alloys and the ratio between glass transition temperature and VFT temperature is found to be 1.5. A comparison with other glass forming systems shows that these bulk metallic glass formers are strong liquids comparable to sodium silicate glass. Furthermore, they are the strongest among metallic glass forming liquids. This behavior is a main contributing factor to the glass forming ability since it implicates a higher viscosity from the melting point down to the glass transition compared to other metallic liquids. Thus, the kinetics in the supercooled liquid is sluggish and yields a low critical cooling rate for glass formation. The relaxation behavior in the glass transition region of the alloys is consistent with their strong glassy nature as reflected by a stretching exponent that is close to 0.8. The microscopic origin of the strong liquid behavior of bulk metallic glass formers is discussed.

Signatures of fragile-to-strong transition in a binary metallic glass-forming liquid

2012 ◽  
Vol 136 (10) ◽  
pp. 104509 ◽  
Author(s):  
K. N. Lad ◽  
N. Jakse ◽  
A. Pasturel
Keyword(s):  
Metallic Glass ◽  
Glass Forming ◽  
Strong Transition

scholarly journals In-situ study of crystallization kinetics in ternary bulk metallic glass alloys with different glass forming abilities

2014 ◽  
Vol 105 (20) ◽  
pp. 201906 ◽  
Author(s):  
Si Lan ◽  
Xiaoya Wei ◽  
Jie Zhou ◽  
Zhaoping Lu ◽  
Xuelian Wu ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Kinetics ◽  
Glass Forming ◽  
In Situ Study

Effects of Nb minor addition on atomic structure and glass forming ability of Zr55Cu30Ni5Al10 bulk metallic glass

2019 ◽  
Vol 6 (6) ◽  
pp. 065202 ◽  
Author(s):  
Majid Samavatian ◽  
Reza Gholamipour ◽  
Vahid Samavatian ◽  
Fahimeh Farahani
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Atomic Structure ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Minor Addition
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