Paper Title:
Study on Modification Mechanism of Antimony in Al-Si Cast Alloys
  Abstract

The effects of modification by antimony on Al-Si cast alloys have been extensively used, but the modification mechanism has not been well accepted. 0.2wt%Sb has perfect modification effects at the existence of of Mg, while much enough Sb for example 1wt % has effects on modification as well without Mg. The cooling process of alloys and the existence manner of elements in cast Al-Si alloy of different content of Sb is studied in this paper. Viewed from the results of DSC thermal analysis, crystallization supercooling increases, nucleation supercooling reduces and eutectic latent heat increases when the content of Sb reaches 0.2wt %. HCombiningH the existence manner of elements in cast Al-Si alloy analyzed by energy - dispersive spectrometry, it is found that the actual modification agent is the clustered Sb in free state. Mg can intensify the modification effects of Sb because Mg added to alloy decreases the solubility of Sb, which allow enough Sb left over to effect modification of alloy.

  Info
Periodical
Advanced Materials Research (Volumes 197-198)
Edited by
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Pages
1079-1085
DOI
10.4028/www.scientific.net/AMR.197-198.1079
Citation
H. L. Li, Q. Y. Chai, "Study on Modification Mechanism of Antimony in Al-Si Cast Alloys", Advanced Materials Research, Vols. 197-198, pp. 1079-1085, 2011
Online since
February 2011
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Price
$32.00
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