scholarly journals Small atom diffusion and breakdown of the Stokes–Einstein relation in the supercooled liquid state of the Zr46.7Ti8.3Cu7.5Ni10Be27.5 alloy

1996 ◽  
Vol 69 (17) ◽  
pp. 2492-2494 ◽  
Author(s):  
U. Geyer ◽  
W. L. Johnson ◽  
S. Schneider ◽  
Y. Qiu ◽  
T. A. Tombrello ◽  
...  
Keyword(s):  
Liquid State ◽  
Supercooled Liquid ◽  
Einstein Relation ◽  
Atom Diffusion ◽  
Supercooled Liquid State ◽  
Small Atom

scholarly journals Small Atom Diffusion and Breakdown on Stokes-Einstein Relation in the Supercooled Liquid State of Zr-Ti-Cu-Ni-Be Alloys

1996 ◽  
Vol 455 ◽  
Author(s):  
U. Geyer ◽  
S. Schneider ◽  
Y. Qiu ◽  
M.-P. Macht ◽  
T. A. Tombrello ◽  
...  
Keyword(s):  
Liquid State ◽  
Diffusion Mechanism ◽  
Supercooled Liquid ◽  
Einstein Relation ◽  
Viscosity Data ◽  
Atom Diffusion ◽  
Glass Forming ◽  
Supercooled Liquid State ◽  
Liquid States ◽  
Arrhenius Expression

ABSTRACTBe diffusivity data in the bulk metallic glass forming alloys Zr41.2Ti13.8Cu12.5Ni10Be22.5 and Zr46.7Ti8.3Cu7.5Ni10Be27.5 are reported for temperatures between 530K and 710K, extending up to 80K into the supercooled liquid states of the alloys. At the glass transition temperature, Tg, a change in temperature dependence of the data is observed in both alloys, and above Tg the diffusivity increases faster with temperature than below. The data in the supercooled liquid can be described by a modified Arrhenius expression containing the communal entropy of the supercooled liquid and based on a diffusion mechanism suggested earlier. The comparison with viscosity data in the supercooled liquid state of Zr46.7Ti8.3Cu7.5Ni10Be27.5 reveals a breakdown of the Stokes- Einstein relation, whereas D(T) and η(T) follow a relation close to van den Beu-kel's. The breakdown of the Stokes- Einstein relation indicates a cooperative diffusion mechanism in the supercooled liquid state of the ZrTiCuNiBe alloys.

Micro mold filling kinetics of metallic glasses in supercooled liquid state

2013 ◽  
Vol 113 (10) ◽  
pp. 104505 ◽  
Author(s):  
J. Ma ◽  
L. S. Huo ◽  
D. Q. Zhao ◽  
W. H. Wang
Keyword(s):  
Metallic Glasses ◽  
Liquid State ◽  
Supercooled Liquid ◽  
Mold Filling ◽  
Supercooled Liquid State ◽  
Kinetics Of

scholarly journals Heat Effects Occurring in the Supercooled Liquid State and Upon Crystallization of Metallic Glasses as a Result of Thermally Activated Evolution of Their Defect Systems

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 417 ◽  
Author(s):  
Andrei Makarov ◽  
Gennadii Afonin ◽  
Yurii Mitrofanov ◽  
Nikolai Kobelev ◽  
Vitaly Khonik
Keyword(s):  
Metallic Glasses ◽  
Liquid State ◽  
Supercooled Liquid ◽  
Shear Moduli ◽  
Thermally Activated ◽  
Supercooled Liquid State ◽  
Heat Effects ◽  
Temperature Dependences ◽  
Defect System ◽  
Kinetics Of

We show that the kinetics of endothermal and exothermal effects occurring in the supercooled liquid state and upon crystallization of metallic glasses can be well reproduced using temperature dependences of their shear moduli. It is argued that the interrelation between the heat effects and shear modulus relaxation reflects thermally activated evolution of interstitial-type defect system inherited from the maternal melt.

Correlation between local structure and stability of supercooled liquid state in Zr-based metallic glasses

2007 ◽  
Vol 449-451 ◽  
pp. 90-94 ◽  
Author(s):  
Junji Saida ◽  
Muneyuki Imafuku ◽  
Shigeo Sato ◽  
Takashi Sanada ◽  
Eiichiro Matsubara ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Local Structure ◽  
Liquid State ◽  
Supercooled Liquid ◽  
Structure And Stability ◽  
Supercooled Liquid State
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