Homogeneous nucleation in metal vapors. 3. Temperature dependence of the critical supersaturation ratio for iron, lead, and bismuth

1977 ◽  
Vol 81 (10) ◽  
pp. 1001-1006 ◽  
Author(s):  
D. J. Frurip ◽  
S. H. Bauer
Keyword(s):  
Temperature Dependence ◽  
Homogeneous Nucleation ◽  
Supersaturation Ratio ◽  
Metal Vapors ◽  
Critical Supersaturation

Mean Lifetime of an Embryo in the Homogeneous Nucleation from Solution of the Tetracyanoplatinates(II) of Barium, Calcium, and Magnesium

1973 ◽  
Vol 51 (20) ◽  
pp. 3435-3442 ◽  
Author(s):  
O. A. Bempah ◽  
O. E. Hileman Jr.
Keyword(s):  
Homogeneous Nucleation ◽  
Silicone Oil ◽  
Classical Model ◽  
Selective Extraction ◽  
Supersaturation Ratio ◽  
Mean Lifetime ◽  
High Supersaturation ◽  
The Mean ◽  
Calcium And Magnesium ◽  
Oil Crystallization

The mean lifetime of an embryo in the homogeneous nucleation from aqueous solution of the tetracyanoplatinates(II) of barium, calcium, and magnesium has been studied using the droplet technique. Supersaturation in the droplets was generated by selective extraction of the solvent into the surrounding silicone oil. Crystallization in the droplets was followed by photomicrography using plane polarized light.The data were analyzed using both the classical model and the mean lifetime model of Carlier and Frisch. The experimental results are consistent with the predicted relationship between the logarithm of the nucleation rate or the logarithm of the mean lifetime of an embryo and the inverse of the square of the logarithm of the supersaturation ratio at high supersaturation ratios. The calculated values of the inter-facial energy, using both models, are in close enough agreement to justify the assumptions made in the analysis.

The Crystal-Melt Interface in Si or Ge

1995 ◽  
Vol 398 ◽  
Author(s):  
Frans Spaepen ◽  
Yan Shao
Keyword(s):  
Thin Film ◽  
Interfacial Tension ◽  
Temperature Dependence ◽  
Homogeneous Nucleation ◽  
Bulk Liquid ◽  
Temperature Dependent ◽  
Interfacial Tensions ◽  
Comparison Of Results

ABSTRACTFrom the nucleation data on undercooling of liquid Si or Ge, crystal-melt interfacial tensions are calculated. Only a temperature-dependent tension can account simultaneously for the results of experiments on bulk and thin film Si. The observed temperature dependence can be accounted for by reasonable values of the interfacial entropy and enthalpy. The analysis is used to determine the temperature-dependent interfacial tension for Ge. A comparison of results for Ge and Si indicates that homogeneous nucleation has not been achieved in the undercooling of bulk liquid Si.

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