Dynamics of solid/liquid interface shape evolution near an insoluble particle—An X-ray transmission microscopy investigation

1997 ◽  
Vol 28 (10) ◽  
pp. 2129-2135 ◽  
Author(s):  
S. Sen ◽  
P. Curreri ◽  
W. F. Kaukler ◽  
D. M. Stefanescu
1986 ◽  
Vol 90 ◽  
Author(s):  
A. Tanaka ◽  
Y. Masa ◽  
S. Seto ◽  
T. Kawasaki

ABSTRACTThe vertical Bridgman method, a gradient freeze technique, is feasible for the growth of high quality, large CdTe crystals. The equi-composition contour of Zn in doped crystals has been used to reveal the solid-liquid interface shape in the growth process. A slow cooling rate is necessary to obtain a convex interface shape. A low temperature gradient at the solid-liquid interface, down to 2 °C/cm, and Zn doping are found to be effective to reduce the etch pit density to 5×103/cm2 (minimum) to 104/cm2 (average). The crystallographic quality has been evaluated by means of X-ray diffraction, X-ray topography, etch pit delineation with the Nakagawa etchant, infrared measurements, photoluminescence and Hall effect measurements. CdTe crystals are found to be free from subgrain structure, Te precipitates and deep levels, and have high electron mobility.


2008 ◽  
Vol 112 (32) ◽  
pp. 10041-10044 ◽  
Author(s):  
Thomas Schubert ◽  
Peter C. Seitz ◽  
Emanuel Schneck ◽  
Makoto Nakamura ◽  
Motonari Shibakami ◽  
...  

1998 ◽  
Vol 553 ◽  
Author(s):  
J.Q. Guo ◽  
T. J. Sato ◽  
T. Kimura ◽  
T. Hirano ◽  
A. P. Tsai

AbstractWe have grown a decagonal single quasicrystal with a size of centimeter order in an A172Co16Ni12 alloy by floating zone method at a growth rate of 0.5 mm/h. The single decagonal quasicrystal has been inspected by Laue X-ray as well as neutron diffraction, revealing a very high quasicrystalline quality. By quenching the liquid during growth, a flat solid-liquid interface has been directly observed. There exists solute redistribution at the growing solid-liquid interface. At steady state growth Al is enriched and Co, Ni are depleted in front of solid-liquid interface. Solute partition ratios of Al, Co and Ni were determined to be about 0.91, 1.57 and 1.08, respectively.


2008 ◽  
Vol 53 (21) ◽  
pp. 6070-6075 ◽  
Author(s):  
Nagahiro Hoshi ◽  
Akira Nakahara ◽  
Masashi Nakamura ◽  
Kazushi Sumitani ◽  
Osami Sakata

Langmuir ◽  
2008 ◽  
Vol 24 (21) ◽  
pp. 12093-12096 ◽  
Author(s):  
Svetlana Erokhina ◽  
Tatiana Berzina ◽  
Luigi Cristofolini ◽  
Victor Erokhin ◽  
Claudia Folli ◽  
...  

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