발간논문

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Vol.23, No.10, 1151 ~ 1159, 1985
Title
A Study on the Effect of Supercooling Obtained by Levitation Melting of the Rapidly Solidified Splats (1)
김원태Won Tae Kim, 김명호Myung Ho Kim, 김동훈Tong Hoon Kim
Abstract
Microstructure of Al-2.98wt%Cr splats which were rapidly solidified by twin piston apparatus after levitation melting was analysed. Transitian of microstructure from microcrystalline to cellular or dendritic occurred with the increase of interface temperature, and monotectic-like reaction i.e. high cone. Liquidid→Intermetallic Compound+low conc. Liquid seemed to occur at cell or dendrite boundary. With the increase of superheating of liquid drop, the thickness of splats reduced possibly due to the available time for thinning of the splats in liquid state, however little difference in lattice parameter was observed. Microstructure of transverse section was varied with the distance from center to edge part of the disk type splats. Precipitate clusters of the rapidly solidified Al-Cr alloy were verified by selected diffraction pattern to be Al_(11) Cr₂, which was supposed to be nucleated and grown in supercooled liquid.
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