论文信息 - Effects of fluctuations on the measurement of distribution coefficients by directional solidification

Effects of fluctuations on the measurement of distribution coefficients by directional solidification

A theory predicting the dependence of the effective distribution coefficient on the amplitude and frequency of temperature fluctuations in the melt is developed from which it is shown that temperature fluctuations decrease the average degree of segregation. The formulae are applied to some recent experimental results. Anomalous behaviour is predicted for systems with k ⪢ 1.

D.T.J. Hurle | E. Jakeman | D. Hurle | E. Jakeman

[1] A. Witt,et al. Microscopic Rates of Growth in Single Crystals Pulled from the Melt: Indium Antimonide , 1968 .

[2] J. Barthel,et al. Über den Einfluß des schichtweisen Einbaues von Fremdelementen beim Zonenschmelzen auf den effektiven Verteilungskoeffizienten , 1967 .

[3] C. J. Smithells,et al. Metals reference book , 1949 .

[4] J. Carruthers,et al. Periodic Temperature Oscillations in Liquid Sodium Nitrate , 1968 .

[5] R. Prim,et al. The Distribution of Solute in Crystals Grown from the Melt. Part I. Theoretical , 1953 .

[6] Jr. Elmer Harp,et al. Convective temperature oscillations in an unrotated Bénard cell , 1968 .

[7] M. Hansen,et al. Constitution of Binary Alloys , 1958 .

[8] E. R. Pike,et al. Striated solute distributions produced by temperature oscillations during crystal growth from the melt , 1968 .