Abstract
On treating aluminium-silicon alloy with 0.2 wt% Sb, it was revealed that antimony refines the eutectic structure by reducing the interflake spacing rather than acting as a modifier. The growth mechanism is similar to the unmodified Al=Si flake structure, giving the relationships of the type ΔT=K 1 V 0.51 and λ=K 2 V −0.4, where K 1 and K 2 are constants at high solidification rate, the transition from flake to fibre is observed. However, this transition occurs at lower velocity compared to quench modification of the pure alloy. The high magnitude of undercooling measured with the antimony-treated alloy is attributed to constitutional undercooling, which leads to extra refinement of the Al-Si eutectic structure.
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References
A. Pacz, US Pat. 1387 900 August 1921.
G. Nagel and R. Portalier, Int. Cast Metals J. AFS 5 (4) (1980) 2.
R. Sharan and N. P. Saksena, ibid 3 (1) (1978 29.
J. Charbonnier, J. J. Perrier and R. Portalier, ibid 3 (4) (1978) 17.
P. Danami and M. Ghafelehbashi, Br. Foundry Man Soc., 72 (1) (1979 4.
R. Elliott, “Eutectic Solidification Processing” Butterworth Monograph in Materials (Butterworths, London, 1983).
S. E. Kisak-U-Rek, paper presented at the World Foundry Congress, 7–12 September, Prague, Czechoslovakia (1986).
S. Khan and R. Elliott, Acta Metall. 41 (1993) 2433.
S. Khan, PhD Thesis, University of Manchester (1990).
S. B. Yaneva, N. V. Stoichev and A. D. Panajetava, Cryst. Res. Technol. 16 (1991) pp737.
S. Khan, in Conference Proceedings, “2nd International Symposium on Advance Material”, 15–19 September, Islamabad, Pakistan (1991).
S. Khan, paper presented at the 4th National Symposium on Frontiers in Physics, Quiad-i-Azam University, 15–19 April, Islamabad, Pakistan (1992).
Shu-zu-lu and A. Hellawell, Metall. Trans. 18A (1987) 1721.
P. Magnin and W. Kurz, Acta Metall. 35 (1987) 1119.
L. M. Hogan and H. Song, Metall. Trans. 9A (1987) 1036.
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Khan, S., Elliott, R. Effect of antimony on the growth kinetics of aluminium-silicon eutectic alloys. Journal of Materials Science 29, 736–741 (1994). https://doi.org/10.1007/BF00445987
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DOI: https://doi.org/10.1007/BF00445987