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Trapping of vacancies by rapid solidification
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0001-5031-919X
2002 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 50, no 12, 3283-3291 p.Article in journal (Refereed) Published
Abstract [en]

A model has been developed for the process of trapping of vacancies in rapid solidification of pure metals, which includes the effect of solute drag where vacancies play the role of solute. Within a reasonable range of parameter values it predicts that substantial trapping cannot occur unless the solidification velocity is 1 m/s or higher. It is demonstrated that the intrinsic mobility of the liquid/solid interface should not be evaluated without considering the effects of vacancy trapping and solute drag caused by vacancies. The model is applied to copper and unknown parameters are evaluated from information on the solidification velocity as a function of undercooling.

Place, publisher, year, edition, pages
2002. Vol. 50, no 12, 3283-3291 p.
Keyword [en]
vacancy, thermodynamics, modelling, trapping, solute drag, cu alloys, phase
URN: urn:nbn:se:kth:diva-21747ISI: 000177017100018OAI: diva2:340445
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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