A Thermodynamic Assessment of the Inoculation Process in Al-base Alloys
2007 (English)In: Transactions of the Indian Institute of Metals, ISSN 0019-493X, Vol. 60, no 2-3, 361-365 p.Article in journal (Refereed) Published
The binary Al-Ti and the ternary phase diagrams Al-Ti-B and Al-Ti-C are calculated from normal thermodynamic laws. The calculated phase diagrams are used to discuss the formation of Al3Ti during the cooling process. In the binary Al-Ti phase diagram an undercooling of only 30 K is shown to be necessary to nucleate new crystals of Al3Ti. It is shown that both Al3Ti and TiB2 are formed during cooling of an inoculated Al-melt. TiB2 is more easily nucleated than Al3Ti due to its lower solubility product. Al3Ti is assumed to be nucleated on the TiB2 particles. TiC is not stable at the melting point of aluminium and will decompose into Al4C3 and Al3Ti during cooling. It is suggested that Al3Ti is the active reagent for nucleation of Al.
Place, publisher, year, edition, pages
2007. Vol. 60, no 2-3, 361-365 p.
IdentifiersURN: urn:nbn:se:kth:diva-5514ISI: 000208324000053ScopusID: 2-s2.0-44649187838OAI: oai:DiVA.org:kth-5514DiVA: diva2:9905
QC 201006022006-03-222006-03-222014-09-24Bibliographically approved