Pressure effect on glass transition in a Zr65Al7.5Cu27.5 metallic glass

2003 ◽  
Vol 83 (16) ◽  
pp. 3284-3286 ◽  
Author(s):  
H. J. Jin ◽  
P. Wen ◽  
K. Lu
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Pressure Effect

scholarly journals Glass transition, crystallization kinetics and pressure effect on crystallization of ZrNbCuNiBe bulk metallic glass

2002 ◽  
Vol 91 (8) ◽  
pp. 4956-4960 ◽  
Author(s):  
P. F. Xing ◽  
Y. X. Zhuang ◽  
W. H. Wang ◽  
L. Gerward ◽  
J. Z. Jiang
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Crystallization Kinetics ◽  
Pressure Effect

scholarly journals Pressure effect of glass transition temperature in Zr46.8Ti8.2Cu7.5Ni10Be27.5 bulk metallic glass

2004 ◽  
Vol 84 (11) ◽  
pp. 1871-1873 ◽  
Author(s):  
J. Z. Jiang ◽  
W. Roseker ◽  
M. Sikorski ◽  
Q. P. Cao ◽  
F. Xu
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Pressure Effect

scholarly journals Effects of Annealing on Enthalpy Recovery and Nanomechanical Behaviors of a La-Based Bulk Metallic Glass

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 579
Author(s):  
Ting Shi ◽  
Lanping Huang ◽  
Song Li
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Structural Relaxation ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Nanoindentation Measurement

Structural relaxation and nanomechanical behaviors of La65Al14Ni5Co5Cu9.2Ag1.8 bulk metallic glass (BMG) with a low glass transition temperature during annealing have been investigated by calorimetry and nanoindentation measurement. The enthalpy release of this metallic glass is deduced by annealing near glass transition. When annealed below glass transition temperature for 5 min, the recovered enthalpy increases with annealing temperature and reaches the maximum value at 403 K. After annealed in supercooled liquid region, the recovered enthalpy obviously decreases. For a given annealing at 393 K, the relaxation behaviors of La-based BMG can be well described by the Kohlrausch-Williams-Watts (KWW) function. The hardness, Young’s modulus, and serrated flow are sensitive to structural relaxation of this metallic glass, which can be well explained by the theory of solid-like region and liquid-like region. The decrease of ductility and the enhancement of homogeneity can be ascribed to the transformation from liquid-like region into solid-like region and the reduction of the shear transition zone (STZ).

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.

PVC/PBA random copolymers obtained by SET–DTLRP: Pressure effect on glass transition, rheology, and processing

2018 ◽  
Vol 25 (1) ◽  
pp. 76-84 ◽  
Author(s):  
Itxaso Calafel ◽  
Mercedes Fernández ◽  
Antxon Santamaría ◽  
Miquel Boix ◽  
Jose Ignacio Conde ◽  
...  
Keyword(s):  
Glass Transition ◽  
Pressure Effect ◽  
Random Copolymers

Eutectic-to-metallic glass transition in the Al–Sm system

2011 ◽  
Vol 59 (17) ◽  
pp. 6604-6619 ◽  
Author(s):  
N. Wang ◽  
Y.E. Kalay ◽  
R. Trivedi
Keyword(s):  
Glass Transition ◽  
Metallic Glass

Effect of Heat Treatment on the Properties of (Fe0.6Co0.4)71Si5Nb4B20 Bulk Metallic Glass

2021 ◽  
Vol 875 ◽  
pp. 70-75
Author(s):  
Syed Zameer Abbas ◽  
Rashid Ali ◽  
Syed Muttahir Shah ◽  
Owais Jan ◽  
Munim Awan
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Cast Alloy ◽  
Amorphous Structure ◽  
Indentation Hardness ◽  
Alloy Sample ◽  
Scanning Calorimetry ◽  
Heat Treated Sample ◽  
Heat Treated

Bulk metallic glasses (BMGs) are an important class of materials with unique set of properties. A bulk metallic glass with composition of (Fe0.6Co0.4)71Nb4Si5B20 was cast in the form of a 1 mm thick strip in a water cooled copper mold. The BMG produced was characterized for structure, thermal and mechanical properties. The X-ray diffraction performed on the as cast alloy has shown completely amorphous structure. The glass transition and crystallization peak temperatures obtained through differential scanning calorimetry scan were 542 °C and 588.4 °C, respectively. Some cast amorphous alloy sample was annealed below glass transition (450 °C for 30 mi93nutes) and others above glass transition (580 °C for 5 minutes) temperatures. Nano- indentation hardness of 13.3 GPa was obtained for as cast alloy while a hardness values of 12.8 and 15.84 GPa were measured for heat treated alloys at temperature of 450 °C and 580 °C, respectively. Increase in hardness was attributed to formation of crystals in an amorphous matrix whereas decrease in hardness was due to relaxation of quenching residual stresses. The maximum value of elastic modulus obtained through indentation was 255 GPa for 580 °C heat treated sample.

Thermal cycling effect on the kinetics of glass transition and crystallization of a Zr-based bulk metallic glass

2020 ◽  
Vol 142 (1) ◽  
pp. 63-73 ◽  
Author(s):  
Pan Gong ◽  
Fangwei Li ◽  
Geng Yin ◽  
Lei Deng ◽  
Xinyun Wang ◽  
...  
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Thermal Cycling ◽  
Bulk Metallic Glass ◽  
Kinetics Of

scholarly journals Reentrant glass transition leading to ultrastable metallic glass

2020 ◽  
Vol 34 ◽  
pp. 66-77 ◽  
Author(s):  
Qing Du ◽  
Xiongjun Liu ◽  
Huiyang Fan ◽  
Qiaoshi Zeng ◽  
Yuan Wu ◽  
...  
Keyword(s):  
Glass Transition ◽  
Metallic Glass
Sign in / Sign up

Export Citation Format

Share Document