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

KINETICS AND THERMAL STABILITY OF Nd55Al20Fe25 BULK METALLIC GLASS

2006 ◽  
Vol 20 (05) ◽  
pp. 225-232 ◽  
Author(s):  
L. XIA ◽  
Y. D. DONG
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Stability Limit ◽  
Supercooled Liquid ◽  
Kauzmann Temperature ◽  
The Stability ◽  
Kinetics Of ◽  
Thermal Stability Of

In this work, we studied the thermal stability and kinetics of Nd 55 Al 20 Fe 25 bulk metallic glass (BMG) with distinct glass transition and multistage crystallizations. The kinetics of glass transition and crystallizations were investigated using the Kissinger method and the ideal glass transition temperature of the alloy was obtained via Lasoka's equation. The thermal stability of the BMG was investigated by means of continuous transformation diagrams obtained from the extension of Kissinger analysis. It is suggested that the stability limit of the supercooled liquid, i.e. Kauzmann temperature, could also be regarded as the long-term stability criteria of the BMG.

scholarly journals Kinetics of Glass Transition and Crystallization in Carbon Nanotube Reinforced Mg-Cu-Gd Bulk Metallic Glass

2006 ◽  
Vol 24 (3) ◽  
pp. 327-331 ◽  
Author(s):  
Yinchun Wang ◽  
Yuren Wang ◽  
Bingchen Wei ◽  
Weihuo Li ◽  
Yufeng Sun
Keyword(s):  
Glass Transition ◽  
Carbon Nanotube ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Kinetics Of

Sub- T g annealing effect on the kinetics of glass transition and crystallization for a Ti-Zr-Be-Fe bulk metallic glass

2017 ◽  
Vol 473 ◽  
pp. 132-140 ◽  
Author(s):  
Xinyun Wang ◽  
Pan Gong ◽  
Lei Deng ◽  
Junsong Jin ◽  
Sibo Wang ◽  
...  
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Annealing Effect ◽  
Kinetics Of

Crystallization Kinetics of ZrCuAlSiY Bulk Metallic Glass

2011 ◽  
Vol 295-297 ◽  
pp. 1259-1262
Author(s):  
Bao Qing Zhang ◽  
Zhi Zhang ◽  
Guo Hua Cao ◽  
Yun Yue ◽  
Bao Zhong Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Activation Energies ◽  
Continuous Heating ◽  
Kinetics Of ◽  
Mould Casting ◽  
Glass Alloy ◽  
Copper Mould

Zr45.1Cu42.3Al8.7Si1.4Y2.5(at. %) metallic glass alloy was prepared by using copper mould casting. The crystallization behaviors of the alloy during continuous heating are investigated mainly by differential canning calorimeter (DSC). The activation energies were obtained from the Kissinger and Doyle equations. The results show that the activation energies of glass transition (Eg), crystallization (Ex) and peak crystallization (Ep) are 365kJ/mol, 281 kJ/mol and 279 kJ/mol, respectively. The crystallization activation energies are all less than the corresponding data of ZrCuAlSi alloy, the results show that thermal stability was decreased with the Y addition.

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).

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