Diffusion in Amorphous Solids - Metallic Alloys and Elemental Semiconductors

1997 ◽  
Vol 143-147 ◽  
pp. 695-710 ◽  
Author(s):  
W. Frank
Keyword(s):  
Amorphous Solids ◽  
Metallic Alloys ◽  
Elemental Semiconductors

TEM study of amorphization of Cu and Ti foils by cold-rolling

1990 ◽  
Vol 48 (4) ◽  
pp. 146-147
Author(s):  
W. A. Chiou ◽  
N. L. Jeon ◽  
Genbao Xu ◽  
M. Meshii
Keyword(s):  
Solid State ◽  
Cold Rolling ◽  
High Energy ◽  
Rapid Quenching ◽  
Vapor Condensation ◽  
Metallic Alloys ◽  
Solid State Reactions ◽  
High Energy Particle ◽  
Amorphous Metallic Alloys ◽  
Thin Foils

For many years amorphous metallic alloys have been prepared by rapid quenching techniques such as vapor condensation or melt quenching. Recently, solid-state reactions have shown to be an alternative for synthesizing amorphous metallic alloys. While solid-state amorphization by ball milling and high energy particle irradiation have been investigated extensively, the growth of amorphous phase by cold-rolling has been limited. This paper presents a morphological and structural study of amorphization of Cu and Ti foils by rolling.Samples of high purity Cu (99.999%) and Ti (99.99%) foils with a thickness of 0.025 mm were used as starting materials. These thin foils were cut to 5 cm (w) × 10 cm (1), and the surface was cleaned with acetone. A total of twenty alternatively stacked Cu and Ti foils were then rolled. Composite layers following each rolling pass were cleaned with acetone, cut into half and stacked together, and then rolled again.

Molecular kinetics in amorphous solids

1992 ◽  
Vol 89 ◽  
pp. 2073-2089 ◽  
Author(s):  
GP Johari
Keyword(s):  
Amorphous Solids

PHOTON-ECHO STUDY OF ULTRAFAST DEPHASING IN AMORPHOUS SOLIDS IN WIDE TEMPERATURE REGION WITH INCOHERENT LIGHT

1991 ◽  
Vol 01 (C7) ◽  
pp. C7-439-C7-442 ◽  
Author(s):  
N. V. GRUZDEV ◽  
E. G. SIL'KIS ◽  
V. D. TITOV ◽  
Yu. G. VAINER
Keyword(s):  
Temperature Region ◽  
Photon Echo ◽  
Amorphous Solids ◽  
Incoherent Light

PHONON DAMPING IN CRYSTALLINE AND AMORPHOUS SOLIDS AT HYPERSONIC FREQUENCIES

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-125-C6-127
Author(s):  
R. Vacher ◽  
J. Pelous
Keyword(s):  
Amorphous Solids

THERMAL DEPENDENCE OF THE STRUCTURE FACTOR IN AMORPHOUS SOLIDS

1985 ◽  
Vol 46 (C8) ◽  
pp. C8-281-C8-286 ◽  
Author(s):  
C. Tête ◽  
D. Boumazouza ◽  
G. Marchal ◽  
Ph. Mangin ◽  
J. Bouillot ◽  
...  
Keyword(s):  
Structure Factor ◽  
Amorphous Solids ◽  
Thermal Dependence

Photocatalytic activity of TiO2 synthesized by anodization and anodic spark deposition

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3141-3152
Author(s):  
Alma C. Chávez-Mejía ◽  
Génesis Villegas-Suárez ◽  
Paloma I. Zaragoza-Sánchez ◽  
Rafael Magaña-López ◽  
Julio C. Morales-Mejía ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Characteristics ◽  
Amorphous Solids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Anodic Spark Oxidation ◽  
Porous Surfaces ◽  
Scanning Electron

AbstractSeveral photocatalysts, based on titanium dioxide, were synthesized by spark anodization techniques and anodic spark oxidation. Photocatalytic activity was determined by methylene blue oxidation and the catalytic activities of the catalysts were evaluated after 70 hours of reaction. Scanning Electron Microscopy and X Ray Diffraction analysis were used to characterize the catalysts. The photocatalyst prepared with a solution of sulfuric acid and 100 V presented the best performance in terms of oxidation of the dye (62%). The electric potential during the synthesis (10 V, low potential; 100 V, high potential) affected the surface characteristics: under low potential, catalyst presented smooth and homogeneous surfaces with spots (high TiO2 concentration) of amorphous solids; under low potential, catalyst presented porous surfaces with crystalline solids homogeneously distributed.

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