Application of the hole theory of liquids to the stability of some metallic glasses

1980 ◽  
Vol 15 (7) ◽  
pp. 1864-1865
Author(s):  
T. Hirata
Keyword(s):  
Metallic Glasses ◽  
Hole Theory ◽  
Theory Of Liquids ◽  
The Stability

Local Structures around Zr, Ni and Cu for the Zr67Cu33 and Zr67Ni33 Metallic Glasses

2007 ◽  
Vol 539-543 ◽  
pp. 1959-1963 ◽  
Author(s):  
M. Matsuura ◽  
Masaki Sakurai ◽  
Wei Zhang ◽  
A. Inoue
Keyword(s):  
Synchrotron Radiation ◽  
Metallic Glasses ◽  
Local Structure ◽  
Liquid State ◽  
Local Structures ◽  
The Stability

XAFS measurements of the Cu, Ni and Zr K-edges for the melt-quenched Zr67Cu33 and Zr67Ni33 metallic glasses were curried out using synchrotron radiation at 20K. Fitting calculations for the EXAFS results reveal that local structure around Ni and Zr in Zr67Ni33 is well represented by those for the crystalline Zr2Ni, while local structure around Zr in Zr67Cu33 is better fitted by an icosahedron rather than crystalline Zr2Cu. Such differences of the local structure attribute to the differences of the stability of super-cooled liquid state and glass formability between Zr67Cu33 and Zr67Ni33 metallic glasses.

Enhancement of plasticity in Zr-based bulk metallic glasses

2007 ◽  
Vol 22 (9) ◽  
pp. 2454-2459 ◽  
Author(s):  
X.D. Wang ◽  
L. Yang ◽  
J.Z. Jiang ◽  
K. Saksl ◽  
H. Franz ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Concentration Ratio ◽  
Bulk Metallic Glasses ◽  
Amorphous Structure ◽  
Catastrophic Failure ◽  
X Ray Diffraction ◽  
Present Evidence ◽  
X Ray ◽  
The Stability ◽  
A Minor

We present evidence that a minor adjustment in Zr/Ni concentration ratio can dramatically enhance the plasticity of monolithic Zr-based bulk metallic glasses (BMGs) from about 2.2% for Zr65Al8Ni10Cu17 BMG to 14% for Zr62Al8Ni13Cu17 BMG. No deformation-induced nanocrystallization appears in a 55% strained Zr62Al8Ni13Cu17 BMG without catastrophic failure while pre-existing nanocrystals in Zr65Al8Ni10Cu17 BMG result in its limited plasticity. Also note that the stability of Zr62Al8Ni13Cu17 BMG against crystallization upon deformation is somewhat higher than that of Zr65Al8Ni10Cu17 BMG. As determined by x-ray diffraction using synchrotron radiation, the enhanced plasticity of Zr62Al8Ni13Cu17 BMG seems to be related to the relative homogeneity of the amorphous structure.

The energy levels of ‘holes’ in liquids

1945 ◽  
Vol 41 (2) ◽  
pp. 180-183 ◽  
Author(s):  
F. C. Auluck ◽  
D. S. Kothari
Keyword(s):  
Surface Tension ◽  
Schrödinger Equation ◽  
Ground State ◽  
Schrodinger Equation ◽  
Energy Levels ◽  
Hole Theory ◽  
Theory Of Liquids

SummaryThe Schrödinger equation for a ‘hole’ in the hole-theory of liquids is constructed and solved by the B.W.K. method. The energy levels are found to be discrete, and the eigenvalues are obtained in terms of the density and surface tension of the liquid. The relation between the energy of the ground state and the temperature of melting is considered.

The Hole Theory of Liquids

Nature ◽  
1944 ◽  
Vol 153 (3895) ◽  
pp. 777-777 ◽  
Author(s):  
F. C. AULUCK ◽  
D. S. KOTHARI
Keyword(s):  
Hole Theory ◽  
Theory Of Liquids
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