Effect of the crystallization kinetic parameters on the structure and properties of a eutectic alloy of the LaB6–TiB2 system

2015 ◽  
Vol 37 (6) ◽  
pp. 394-401 ◽  
Author(s):  
P. I. Loboda ◽  
T. O. Soloviova ◽  
Yu. I. Bogomol ◽  
D. O. Remizov ◽  
O. I. Bilyi
Keyword(s):  
Kinetic Parameters ◽  
Eutectic Alloy ◽  
Crystallization Kinetic ◽  
Structure And Properties

Effects of small additions of Ag, Al, and Ga on the structure and properties of the Sn–9Zn eutectic alloy

2006 ◽  
Vol 416 (1-2) ◽  
pp. 98-105 ◽  
Author(s):  
Kang-I Chen ◽  
Shou-Chang Cheng ◽  
Sean Wu ◽  
Kwang-Lung Lin
Keyword(s):  
Eutectic Alloy ◽  
Structure And Properties

A Method for Determining Crystallization Kinetic Parameters from one Nonisothermal Calorimetric Experiment

2000 ◽  
Vol 15 (4) ◽  
pp. 1000-1007 ◽  
Author(s):  
Haoyue Zhang ◽  
Brian S. Mitchell
Keyword(s):  
Kinetic Equation ◽  
Kinetic Parameters ◽  
Crystallization Kinetic ◽  
Frequency Factor ◽  
Nucleation Site ◽  
Avrami Equation ◽  
Transformation Rate ◽  
Isothermal Process ◽  
Electronic Microscopy ◽  
New Equation

A new equation was developed for evaluating kinetic parameters in the isokinetic range of a phase transformation using nonisothermal calorimetric techniques. The Johnson–Mehl–Avrami equation was extended by considering that the transformation rate in an isothermal process can be translated into the nonisothermal transformation in an isokinetic range. The Avrami exponent, n, activation energy, E, and frequency factor, K0, were calculated from only one nonisothermal experiment by using the new kinetic equation for amorphous Se (a-Se), polysilane/polycarbosilane (PS/PCS), and lithium disilicate (LiO2 · 2SiO2 or LS2) samples with nucleation site saturation. The values of E and K0 calculated using the new kinetic equation agree well with those obtained by the Kissinger equation for the prenucleated a-Se, PS/PCS, and LS2 samples. The values of n indicate that volume crystallization is dominant in the bulk a-Se and LS2 samples, whereas surface crystallization is dominant in the powdered PS/PCS sample. These results for a-Se were confirmed by scanning and transmission electronic microscopy.

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