The effect of heating rate on the phase transition and crystallization kinetics of Ag2Se0.2Te0.8 alloy

2014 ◽  
Vol 119 (1) ◽  
pp. 91-97 ◽  
Author(s):  
C. Vijayan ◽  
N. Soundararajan ◽  
R. Chandramohan ◽  
S. Ramaswamy ◽  
P. Gnanadurai
Keyword(s):  
Phase Transition ◽  
Heating Rate ◽  
Crystallization Kinetics ◽  
Kinetics Of

Phase Transition and Crystallization Kinetics of a Supramolecular System in a Microfluidic Platform

2020 ◽  
Vol 32 (19) ◽  
pp. 8342-8349 ◽  
Author(s):  
Dana Cohen-Gerassi ◽  
Zohar A. Arnon ◽  
Tom Guterman ◽  
Aviad Levin ◽  
Moumita Ghosh ◽  
...  
Keyword(s):  
Phase Transition ◽  
Crystallization Kinetics ◽  
Supramolecular System ◽  
Microfluidic Platform ◽  
Kinetics Of

Correlation between nucleation, phase transition and dynamic melt-crystallization kinetics in PAni/PVDF blends

RSC Advances ◽  
2015 ◽  
Vol 5 (91) ◽  
pp. 74486-74498 ◽  
Author(s):  
Swarup Biswas ◽  
Bula Dutta ◽  
Subhratanu Bhattacharya
Keyword(s):  
Phase Transition ◽  
Crystallization Kinetics ◽  
Heterogeneous Nucleation ◽  
Vinylidene Fluoride ◽  
Melt Crystallization ◽  
Poly Vinylidene Fluoride ◽  
Nucleation Phase ◽  
Kinetics Of

The dynamic melt crystallization kinetics of polyaniline (PAni)/poly(vinylidene fluoride) (PVDF) blends of different compositions has been investigated to understand the influence of PAni on the heterogeneous nucleation and phase transition of PVDF.

Generalised kinetics of overall phase transition useful for glass crystallisation when assuming non-isothermal conditions

2020 ◽  
Vol 61 (6) ◽  
pp. 209-212 ◽  
Author(s):  
Isak Avramov ◽  
◽  
Jaroslav Šesták ◽  
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Activation Energy ◽  
Heating Rate ◽  
Characteristic Temperature ◽  
Isothermal Conditions ◽  
Constant Rate ◽  
Avrami Parameter ◽  
Kinetics Of ◽  
Glass Crystallisation

The modelling of reaction kinetics is a fashionable subject of publications. We developed an analogue of the KJMA equation under non-isothermal conditions α(T)=1−exp(−(T/θ)N) that describes the dependence of degree of transformation α(T) at a constant rate, q, of heating with characteristic temperature θ(q) and power N, proportional to the Avrami parameter, n. This equation is valid even when the activation energy of the process is not constant. We demonstrate that reliable information about the activation energy is obtained when the experimental data are plotted in coordinates: logq (heating rate) against logTp (peak temperature).

scholarly journals Crystallization Kinetics of 50% W Particles/Zr41.2Ti13.8Cu12.5Ni10Be22.5 Metallic Glass Matrix Composite

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1011
Author(s):  
Xiaohong Su ◽  
Huie Hu ◽  
Xiaodong Kong ◽  
Zhou Lu
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Heating Rate ◽  
Matrix Composite ◽  
Crystallization Kinetics ◽  
Glass Matrix ◽  
Supercooled Liquid ◽  
Glass Matrix Composite ◽  
Metallic Glass Matrix Composite ◽  
Kinetics Of

The crystallization kinetics of the 50% W particles/Zr41.2Ti13.8Cu12.5Ni10Be22.5 metallic glass matrix composite were studied by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). The results showed that the crystallization and the glass transition of the composite both have a kinetic effect. The characteristic temperatures Tg and Tx of the composite are linearly related to the natural logarithm of the heating rate (lnφ), and the presence of W particles increases the dependence of the glass transition on the heating rate. With the addition of W particles, the viscosity of the amorphous matrix in the supercooled liquid region increases, which hinders the spread and migration of the alloy elements and causes the thermal stability of the supercooled liquid to improve. In the isothermal crystallization, the mode of nucleation and the growth process of the crystal changes with the annealing temperature. The Avrami exponent with the crystallized fraction at 698 K was about 2.5 in the middle stage of the crystallization, implying three-dimensional growth with a constant nucleation rate.

Crystallization Kinetics and Phase Transformation of Li2O–Fe2O3–MnO2–CaO–P2O5–SiO2 Glass

1998 ◽  
Vol 13 (9) ◽  
pp. 2655-2661 ◽  
Author(s):  
Chi-Shiung His ◽  
Moo-Chin Wang
Keyword(s):  
Phase Transformation ◽  
Heating Rate ◽  
Crystallization Kinetics ◽  
Xrd Analysis ◽  
Nonisothermal Kinetics ◽  
Growth Morphology ◽  
Surface Nucleation ◽  
Activation Energy Of Crystallization ◽  
Dta Analysis ◽  
Kinetics Of

The crystallization kinetics and phase transformation of 10Li2O–14Fe2O3–11MnO2–25CaO–5P2O5–35SiO2 (LFMCPS) glass have been investigated using differential thermal analysis (DTA), Χ-ray diffraction (XRD), and scanning electron microscopy (SEM). The major crystalline phase determined by XRD analysis was triphylite [Li(Fe0.5Mn0.5)PO4], β–wollastonite (β CaO SiO2) and magnetite (Fe3O4) as the minor phases. The nonisothermal kinetics of crystallization of the LMFCPS glass was investigated using DTA analysis. The activation energy of crystallization for LFMCPS glass was 74.6 kcalymol. The growth morphology parameter n was 0.98 at a heating rate of 5 °C/min and decreased to 0.74 as the heating rate increased to 20 °C/min. The numerical factor of crystallization mechanism m was 0.57 at low crystallization temperature and gradually decreased as the temperature increased. For the experiment, the parameters n and m were approximately one. These results indicated that the surface nucleation was dominant in LFMCPS glass crystallization.

Synthesis and Crystallization Kinetics of Y 2CaA1 4SiO 12 Garnet-Type Glass-Ceramic

2020 ◽  
Author(s):  
Liyuan Wang ◽  
Jiaxi Liu ◽  
Nan Lu ◽  
Zengchao Yang ◽  
Gang He ◽  
...  
Keyword(s):  
Crystallization Kinetics ◽  
Glass Ceramic ◽  
Kinetics Of

Temperature Effect on the Two-Dimensional Phase Transition Kinetics of Adenine Adsorbed at the Hg Electrode/Aqueous Solution Interface

2003 ◽  
Vol 68 (8) ◽  
pp. 1407-1419 ◽  
Author(s):  
Claudio Fontanesi ◽  
Roberto Andreoli ◽  
Luca Benedetti ◽  
Roberto Giovanardi ◽  
Paolo Ferrarini
Keyword(s):  
Phase Transition ◽  
Aqueous Solution ◽  
Phase Change ◽  
Temperature Effect ◽  
Transition Rate ◽  
Effect Of Temperature ◽  
Two Dimensional ◽  
Solution Interface ◽  
Phase Transition Kinetics ◽  
Kinetics Of

The kinetics of the liquid-like → solid-like 2D phase transition of adenine adsorbed at the Hg/aqueous solution interface is studied. Attention is focused on the effect of temperature on the rate of phase change; an increase in temperature is found to cause a decrease of transition rate.

Reordering and Crystallization of Silicon Carbide Amorphized by Neutron Irradiation

2000 ◽  
Vol 650 ◽  
Author(s):  
Lance L. Snead ◽  
Martin Balden
Keyword(s):  
Thin Film ◽  
Silicon Carbide ◽  
Crystallization Kinetics ◽  
Neutron Irradiation ◽  
Onset Temperature ◽  
Kinetics Of Crystallization ◽  
Crystallization Onset Temperature ◽  
Crystallization Onset ◽  
Kinetics Of

ABSTRACTDensification and crystallization kinetics of bulk SiC amorphized by neutron irradiation is studied. The temperature of crystallization onset of this highly pure, fully amorphous bulk SiC was found to be between 875-885°C and crystallization is nearly complete by 950°C. In-situ TEM imaging confirms the onset of crystallization, though thin-film effects apparently alter the kinetics of crystallization above this temperature. It requires >1125°C for complete crystallization of the TEM foil. Annealing at temperatures between the irradiation and crystallization onset temperature is seen to cause significant densification attributed to a relaxation, or reordering, of the as-amorphized structure.

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