Method of growing composites of the type exhibiting the Soret ef

Details Method of growing composites of the type exhibiting the Soret ef Method of growing composites of the type exhibiting the Soret ef

1975-03-11

1977-06-14

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 65R, 75139, 164 60, C22C 109

Patent

active

040295001

ABSTRACT:
A predetermined amount of segregation is introduced into a molten sample of a composite that exhibits the Soret effect, such amount approximating the amount of segregation resulting from directional solidification of the sample. The molten sample is then directionally solidified starting at the end opposite the end richer in the constituent that would migrate toward the cooler part of a liquid solution of the composite maintained in a temperature gradient. Since solidification commences at the end deficient in such constituent, its migration toward the interface between the solid and liquid during the solidification will compensate for the deficiency yielding a more homogeneous product.

REFERENCES:
patent: 2739088 (1956-03-01), Pfann
patent: 3124452 (1964-03-01), Kraft
patent: 3464812 (1969-09-01), Utech
patent: 3847679 (1974-11-01), Livingston
Chadwick, G. A.; Eutectic Alloy Solidification Progress in Materials Science vol. 12, (1963) p. 149.

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