Effective parameter for the selection of modifying agent for Al-Si alloy

H. S. Kang, W. Y. Yoon, K. H. Kim, M. H. Kim, Y. P. Yoon, I. S. Cho

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


To select effective modifying agent for Al-Si alloys, in addition to conventional parameters such as the crystal structure and lattice constant, the mixing enthalpy, which was calculated by the Miedema model, was newly considered. The large negative value of mixing enthalpy was counted as a new parameter. According to the result of calculation, four elements, including Sr, Y, Sm and Gd, which have large negative mixing enthalpies with Si, were selected as modifying agent for eutectic Si crystals. It was observed that these elements result in the modification of the eutectic Si crystals and that the eutectic depression of the modified alloy is larger than 6 K.

Original languageEnglish
Pages (from-to)334-337
Number of pages4
JournalMaterials Science and Engineering: A
Publication statusPublished - 2007 Mar 25

Bibliographical note

Funding Information:
The support of Korea Science and Engineering Foundation (R01-2003-00258) for research is gratefully acknowledged.


  • Al-Si alloy
  • Effective parameter
  • Miedema model
  • Modifying agent

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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