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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.27 no.2 (2000), pp. 099-102
A New Model of Crystal Growth from Undercooled Melts
V.I. Dimitrov1,2, A. Gungor1, M. Kumru1, A. Avinc3
1Department of Physics, Fatih University, Istanbul, Turkey
2Department of Solid State Physics, Faculty of Physics, Univers ity of Sofia, Sofia, Bulgaria
3Department of Physics, Uludag University, Bursa, Turkey
go back1Department of Physics, Fatih University, Istanbul, Turkey
2Department of Solid State Physics, Faculty of Physics, Univers ity of Sofia, Sofia, Bulgaria
3Department of Physics, Uludag University, Bursa, Turkey
Abstract. In spite of a number of attempts to improve the widely quoted model of Lipton, Travedi and Kurtz for crystal growth from undercooled melts, the agreement between the theory and the experiment, especially at high undercooling, is still poor. In the present study we show that the rejected volume at the crystal/liquid interface is the main reason for the contradictions. The interface of a growing crystal is a source of free-volume (an analog of vacancies in crystals) which has to diffuse towards the liquid. To transport the rejected volume from the crystal/ liquid interface a driving force has to be created by cooling the liquid by some amount.