Evolution of the amorphous fraction of PEEK during annealing at atmospheric and high pressure above the glass transition temperature

2013 ◽  
Vol 130 (2) ◽  
pp. 1148-1157 ◽  
Author(s):  
Marion Dasriaux ◽  
Sylvie Castagnet ◽  
Ludovic Thilly ◽  
Laurence Chocinski-Arnault ◽  
Séverine A. E. Boyer
Keyword(s):  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Amorphous Fraction

scholarly journals The influence of iodide on glass transition temperature of high‐pressure nuclear waste glasses

2020 ◽  
Vol 104 (3) ◽  
pp. 1360-1369
Author(s):  
Valentin Jolivet ◽  
Yann Morizet ◽  
Jonathan Hamon ◽  
Michael Paris ◽  
Tomo Suzuki‐Muresan
Keyword(s):  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Nuclear Waste

Phase transition of Zr41Ti14Cu12.5Ni10Be22.5 bulk amorphous below glass transition temperature under high pressure

2001 ◽  
Vol 78 (5) ◽  
pp. 601-603 ◽  
Author(s):  
Ming Xiang Pan ◽  
Jing Guo Wang ◽  
Yu Shu Yao ◽  
De Qian Zhao ◽  
Wei Hua Wang
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature

Effect of high pressure on glass transition in Zr-Ti-Cu-Ni-Be bulk metallic glass

2002 ◽  
Vol 754 ◽  
Author(s):  
Wei Hua Wang ◽  
Ping Wen ◽  
Yan Hui Zhao ◽  
Ming Xiang Pan ◽  
De Qian Zhao
Keyword(s):  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Free Volume ◽  
Bulk Glass ◽  
Free Volume Theory ◽  
Glass Forming

ABSTRACTA new method is developed to directly exhibit glass transition in Zr-Ti-Cu-Ni-Be bulk glass-forming alloy under high pressure in metallic glass. Via the method, we derive an increase of glass transition temperature, Tg with pressure of 5.6 K/GPa, and a formation volume (ΔVf) of 6.5 Å3 for diffusion and the migration volume (ΔVm) of 6.5 Å3. The glass transition under high pressure is simulated based on the free-volume theory, and the simulations are consistent with the experimental observations.

A Molecular Dynamics Investigation into the Cooling Characteristics of Ni and Cu Alloys at High Pressure

2006 ◽  
Vol 505-507 ◽  
pp. 1093-1098
Author(s):  
Ming Horng Su ◽  
Hung Chang Chen
Keyword(s):  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Melting Temperature ◽  
Room Temperature ◽  
Tight Binding ◽  
Binding Potential ◽  
Ni Alloys ◽  
Pure Cu

This paper studies the phase transitions of Cu and Ni alloys as they cool from melting temperature to room temperature under high-pressure conditions. The interatomic forces acting between the atoms are modeled by the tight-binding potential. Control over the environmental pressure and the cooling temperature is maintained by a canonical ensemble (N, P, T) system. The numerical results confirm that the metal phase transition is influenced significantly by the pressure conditions, even in the case of pure Cu and Ni metals. Three specific transition pathways are identified for the Cu and Ni alloys as they cool from melting temperature to room temperature, namely a transition at the melting temperature to a crystalline structure, a transition at the glass transition temperature to a glass (amorphous) structure, and finally solidification at the melting temperature followed by a subsequent transition at the glass transition temperature. The results reveal that glass transition generally occurs at lower pressures in alloys with higher Cu compositions, while glass transition following prior solidification tends to takes place at higher pressures in alloys with higher Ni compositions.

High pressure torsion of a Vitreloy bulk metallic glass near the glass transition temperature

2018 ◽  
Vol 498 ◽  
pp. 25-31 ◽  
Author(s):  
Zsolt Kovács ◽  
Erhard Schafler ◽  
Viktória Kovács Kis ◽  
Péter J. Szommer ◽  
Ádám Révész
Keyword(s):  
High Pressure ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
High Pressure Torsion
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