scholarly journals Structures at Glassy, Supercooled Liquid, and Liquid States in La-Based Bulk Metallic Glasses

2009 ◽  
Vol 41 (7) ◽  
pp. 1634-1639 ◽  
Author(s):  
Q.K. Jiang ◽  
Z.Y. Chang ◽  
X.D. Wang ◽  
J.Z. Jiang
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Liquid States

Correlation between effective activation energy and pre-exponential factor for diffusion in bulk metallic glasses

1999 ◽  
Vol 14 (8) ◽  
pp. 3200-3203 ◽  
Author(s):  
S. K. Sharma ◽  
F. Faupel
Keyword(s):  
Activation Energy ◽  
Metallic Glasses ◽  
Effective Activation Energy ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
The Novel ◽  
Effective Activation ◽  
Exponential Factor ◽  
Liquid States ◽  
Fitting Parameters

The values of effective activation energy (Q) and pre-exponential factor (D0) reported in the literature for diffusion in the novel bulk metallic glasses, both in the glassy and the deeply supercooled liquid regions, are found to follow the same correlation as reported earlier in conventional metallic glasses, namely D0 = A exp(Q/B), where A and B are fitting parameters with values A = 4.8 × 10−19 m2 s−1 and B = 0.056 eV atom−1. A possible explanation for the observed values of A and B is given by combining an activation energy and a free volume term. The interpretation favors a cooperative mechanism for diffusion in the glassy and deeply supercooled liquid states.

Atomic structure of bulk metallic glasses and their supercooled liquid states probed by high-energy synchrotron light

2012 ◽  
Vol 13 (3) ◽  
pp. 218-226 ◽  
Author(s):  
K. Georgarakis ◽  
A.R. Yavari ◽  
D.V. Louzguine ◽  
G. Vaughan ◽  
W.J. Botta
Keyword(s):  
Metallic Glasses ◽  
Atomic Structure ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
High Energy ◽  
Synchrotron Light ◽  
Liquid States

Fe-based bulk metallic glasses with a larger supercooled liquid region and high ductility

2008 ◽  
Vol 498 (1-2) ◽  
pp. 464-467 ◽  
Author(s):  
K.Q. Qiu ◽  
J. Pang ◽  
Y.L. Ren ◽  
H.B. Zhang ◽  
C.L. Ma ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
High Ductility

Ultrasound-Induced Structural Anomaly of Supercooled Liquid in Some Bulk Metallic Glasses

2004 ◽  
Vol 45 (4) ◽  
pp. 1189-1193 ◽  
Author(s):  
Tetsu Ichitsubo ◽  
Eiichiro Matsubara ◽  
Kazuhiro Anazawa ◽  
Nobuyuki Nishiyama ◽  
Satoshi Kai ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Structural Anomaly

Relationship between the widths of supercooled liquid regions and bond parameters of Mg-based bulk metallic glasses

2003 ◽  
Vol 321 (1-2) ◽  
pp. 120-125 ◽  
Author(s):  
Shoushi Fang ◽  
Xueshan Xiao ◽  
Lei Xia ◽  
Weihuo Li ◽  
Yuanda Dong
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid

Thermal stability, corrosion resistance, and surface analysis of Cu–Hf–Ti–Ni–Nb bulk metallic glasses

2009 ◽  
Vol 24 (2) ◽  
pp. 316-323 ◽  
Author(s):  
C.L. Qin ◽  
W. Zhang ◽  
K. Asami ◽  
N. Ohtsu ◽  
A. Inoue
Keyword(s):  
Thermal Stability ◽  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Surface Film ◽  
Bulk Metallic Glasses ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Liquid Region ◽  
Copper Mold Casting ◽  
Mold Casting

Bulk metallic glasses (BMGs) with high thermal stability and good corrosion resistance were synthesized in the (Cu0.6Hf0.25Ti0.15)100−x−yNiyNbx system by copper mold casting. The addition of Ni element causes an extension of a supercooled liquid region (ΔTx = Tx – Tg) from 60 K for Cu60Hf25Ti15 to 70 K for (Cu0.6Hf0.25Ti0.15)95Ni5. The simultaneous addition of Ni and Nb to the alloy is effective in improving synergistically the corrosion resistance in 1 N HCl, 3 mass% NaCl, and 1 N H2SO4 + 0.01 N NaCl solutions. The highly protective Hf-, Ti-, and Nb-enriched surface film is formed by the rapid initial preferential dissolution of Cu and Ni, which is responsible for the high corrosion resistance of the alloys in the solutions examined.

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