General evolution equation for the specific interface area of dendrites during alloy solidification

2017 ◽  
Vol 140 ◽  
pp. 87-96 ◽  
Author(s):  
H. Neumann-Heyme ◽  
K. Eckert ◽  
C. Beckermann
Keyword(s):  
Evolution Equation ◽  
Interface Area ◽  
Alloy Solidification ◽  
Specific Interface Area

Extraction Kinetics and Mechanism of La(III) by P204-Kerosine from Phosphoric Acid

2014 ◽  
Vol 881-883 ◽  
pp. 677-682 ◽  
Author(s):  
Yun Shan Xiao ◽  
Ya Gu Dang ◽  
De Jun Fei ◽  
Ying Zhang
Keyword(s):  
Phosphoric Acid ◽  
Interfacial Area ◽  
Extraction Process ◽  
Kinetics And Mechanism ◽  
Extraction Rate ◽  
Extraction Kinetics ◽  
Interface Area ◽  
Plateau Region ◽  
Specific Interface Area ◽  
Mixed Mechanism

The extraction kinetics and mechanism of La (III) by P204-kerosine from phosphoric acid were investigated by constant interfacial cell with laminar flow. The effects of stirring speed, temperature, specific interface area on extraction rate were studied. The results indicated that a plateau region is appeared at the stirring speed of over 115r/min. The extraction apparent activation energy was calculated to be-13.40kJ/mol and the extraction process is controlled by a mixed mechanism of diffusion and chemical reaction. The rate equation of extraction was deduced. Under conditions of 25°C and interfacial area 19.64cm2, the extraction rate constant was 2.08×10-6 m·s-1·. Through the derivation of the reaction mechanism the reaction zone is at the liquid-liquid interface.

On the importance of specific interface area in clay nanocomposites of PMMA filled with synthetic nano-mica

Polymer ◽  
2014 ◽  
Vol 55 (16) ◽  
pp. 3770-3781 ◽  
Author(s):  
Mazen Ziadeh ◽  
Bianca Fischer ◽  
Jasmin Schmid ◽  
Volker Altstädt ◽  
Josef Breu
Keyword(s):  
Clay Nanocomposites ◽  
Interface Area ◽  
Specific Interface Area

Finite volume and spectral methods applied to Pb-30%TI alloy solidification

2001 ◽  
Vol 11 (PR6) ◽  
pp. Pr6-151-Pr6-159 ◽  
Author(s):  
R. Guérin ◽  
M. El Ganaoui ◽  
P. Haldenwang ◽  
P. Bontoux
Keyword(s):  
Finite Volume ◽  
Spectral Methods ◽  
Ti Alloy ◽  
Alloy Solidification
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