Computer Science
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24.1251c&link_type=abstract
Advances in Space Research, Volume 24, Issue 10, p. 1251-1255.
Computer Science
Scientific paper
Peritectic solidification has been investigated on Cu91.7Co8.3 alloy by containerless processing in a 3m drop tube. Droplets ranging from 100 to 900μm in diameter have been obtained. The microstructure of the droplets larger than 150μm is characterized by primary α-Co dendrites embedded in Cu-rich matrix, and the completion of peritectic transformation is facilitated as droplet size decreases. It is also found that α-Co dendrites and peritectic cells are conspicuously refined with the decrease of droplet diameter due to the fragmentation of α-Co dendrites by remelting during recalescence. In those droplets finer than 150μm, the precipitation of α-Co dendrites and the peritectic transformation have been suppressed completely, and a coarse metastable supersaturated Cu-rich dendritic microstructure is formed directly from the undercooled melt. In addition, the dendritic growth of primary α-Co phase has been calculated on the basis of the modified LKT/BCT model
Cao C. D.
Lu Xin-You
Wei Bo-Bo
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