Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1980-12-08
1982-08-17
Hampilos, Gus T.
Metal founding
Process
Shaping liquid metal against a forming surface
156619, 156624, 164 711, 1641221, 1641222, 252 623ZT, 252 623V, B22D 2704, B22D 2708, H01L 2134
Patent
active
043444768
ABSTRACT:
A process for producing single crystal Hg.sub.1-x Cd.sub.x Te is disclosed. An ingot of Hg.sub.1-x cd.sub.x Te is prepared from a stoichiometric mixture of mercury, cadmium and tellurium by the supercooling of a heated mixture thereof from a point above liquidus to a point, a predetermined function of x, below liquidus. The ingot is then quenched in ambient air, producing a large amount of crystallites with small grain boundaries. The subsequent application of heat to the ingot yields a relatively large amount of single crystal material.
REFERENCES:
patent: 3468363 (1969-09-01), Parker et al.
patent: 3622399 (1971-11-01), Johnson
Journal of the Electrochemical Society 116, (1969), "Preparation of Cd.sub.x Hg.sub.1-x Te Crystals by the Vertical-Zone Melting Method", E. Z. Dziuba, pp. 104-106.
Metallurgical Transactions 1, (1970), "Rapid Nondestructive Evaluation of Macroscopic Defects in Crystalline Materials: The Laue Topography of (HgCd)Te"; L. N. Swink-M. J. Brau, pp. 629-634.
Journal of Electronic Materials 1, (1972), "Single Crystal Growth of Hg.sub.1-x Cd.sub.x Te"; T. C. Hartman, pp. 230-242.
Journal of Electronic Materials 5, (1976), "Hg-Cd-Te Phase Diagram Determination by High Pressure Reflux", J. Steininger, pp. 299-320.
Journal of the Electrochemical Society 125, (1978), "A Possible Method for the Growth of Homogeneous Mercury Cadmium Telluride Single Crystals" G. Fiorito, G. Gasparrini, D. Passoni pp. 315-317.
Journal of Crystal Growth 37, (1977), "Pressure Reflux Technique for Growth of Hg.sub.1-x Cd.sub.x Te Crystals", J. Steininger, pp. 107-115.
Journal of the Electrochemical Society 117, Abstract No. 87, (1970).
Cole Roger A.
Sutcliffe Edward Y.
Collins David W.
Hampilos Gus T.
MacAllister W. H.
Santa Barbara Research Center
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