Effect of impurity phase migration on Al-30wt.%Si solvent refining with Zr additions during directional solidification

2022 ◽  
Vol 278 ◽  
pp. 119572
Author(s):  
Chen Chen ◽  
Jingwei Li ◽  
Xuesong Jiang ◽  
Wangfeng Song ◽  
Jian Shi ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Impurity Phase ◽  
Solvent Refining

Purification of Silicon by Solvent Refining with Si-Sn Alloy

2013 ◽  
Vol 690-693 ◽  
pp. 962-966 ◽  
Author(s):  
Cheng Hao Lu ◽  
Ming Fang ◽  
Hui Xian Lai ◽  
Liu Qing Huang ◽  
Juan Chen ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Binary Alloy ◽  
Acid Leaching ◽  
Alloy System ◽  
Solvent Refining ◽  
Icp Ms ◽  
Leaching Experiments ◽  
Binary Alloy System

Silicon was purified by solvent refining with Si-Sn binary alloy system. Two descend mold velocities, 10mm/h and 100mm/h were tested in directional solidification of the alloy melt. The morphology, structure and the ingredient of the ingots have been investigated by SEM, XRD, EPMA, GDMS and ICP-MS. The contents of Fe, N, C , Ca, Mn, Cu, P and B are significantly lower than that in raw silicon. Furthermore, the acid leaching experiments were introduced to remove tin from silicon. The temperature of acid leaching and the type of acids were the predominant conditions in tin separation from silicon by acid leaching.

The effect of back-melting on the continuity of crystallographic orientation and composition in HgZnTe

1992 ◽  
Vol 50 (2) ◽  
pp. 1696-1697
Author(s):  
H.J. Zuo ◽  
M.W. Price ◽  
R.D. Griffin ◽  
R.A. Andrews ◽  
G.M. Janowski
Keyword(s):  
Directional Solidification ◽  
Space Shuttle ◽  
Solidification Process ◽  
Space Experiment ◽  
Infrared Detection ◽  
Directionally Solidified ◽  
Crystallographic Defects ◽  
Semiconducting Alloys ◽  
Uniform Composition ◽  
Growth Experiments

The II-VI semiconducting alloys, such as mercury zinc telluride (MZT), have become the materials of choice for numerous infrared detection applications. However, compositional inhomogeneities and crystallographic imperfections adversly affect the performance of MZT infrared detectors. One source of imperfections in MZT is gravity-induced convection during directional solidification. Crystal growth experiments conducted in space should minimize gravity-induced convection and thereby the density of related crystallographic defects. The limited amount of time available during Space Shuttle experiments and the need for a sample of uniform composition requires the elimination of the initial composition transient which occurs in directionally solidified alloys. One method of eluding this initial transient involves directionally solidifying a portion of the sample and then quenching the remainder prior to the space experiment. During the space experiment, the MZT sample is back-melted to exactly the point at which directional solidification was stopped on earth. The directional solidification process then continues.

DIRECTIONAL SOLIDIFICATION IN MICROGRAVITY

1998 ◽  
Author(s):  
Victoria Timchenko ◽  
P. Y. P. Chen ◽  
Graham de Vahl Davis ◽  
Eddie Leonardi
Keyword(s):  
Directional Solidification
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