Accession Number : AD0457914

Title :   THE SOLIDIFICATION BEHAVIOR OF UNDERCOOLED GALLIUM.

Descriptive Note : Progress rept., 1 Aug-31 Dec 64,

Corporate Author : THAYER SCHOOL OF ENGINEERING HANOVER NH

Personal Author(s) : Colligan, George A. ; Loomis, Warren T.

Report Date : JAN 1965

Pagination or Media Count : 43

Abstract : A technique has been developed that allows one to consistently supercool relatively large masses, up to four grams, of gallium. The maximum level of undercooling reached, 76 C., is the same as that reported for droplets of gallium 10-100 microns in diameter. The technique allows one to control the initiation of solidification, observe, and record dendritic and isothermal growth during solidification, and to correlate high speed motion pictures taken during solidification with Laue back-reflection x-ray diffraction orientations of the final ingot. (Author)

Descriptors :   (*GALLIUM, SUPERCOOLING), TRANSFORMATIONS, SINGLE CRYSTALS, CRYSTAL GROWTH, NUCLEATION, HEAT OF FUSION, X RAY DIFFRACTION, HIGH SPEED PHOTOGRAPHY, FREEZING.

Distribution Statement : APPROVED FOR PUBLIC RELEASE