Crystallization kinetics of Ni-P glass ? activation energies for nucleation and growth of nuclei

1988 ◽  
Vol 23 (8) ◽  
pp. 3001-3005 ◽  
Author(s):  
K. Lu ◽  
J. T. Wang
Keyword(s):  
Crystallization Kinetics ◽  
Nucleation And Growth ◽  
Activation Energies ◽  
Kinetics Of

The Non-Isothermal Crystallization Kinetics of Dispersible Nano-SiO2/PA66 Composites

2012 ◽  
Vol 535-537 ◽  
pp. 94-102
Author(s):  
Lei Jia ◽  
Li Ping Guo ◽  
Xiang Min Xu
Keyword(s):  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Activation Energies ◽  
Crystallization Time ◽  
Dsc Analysis ◽  
Screw Extruder ◽  
Isothermal Crystallization Kinetics ◽  
Melt Compounding ◽  
Twin Screw ◽  
Kinetics Of

The PA66-based composites containing dispersible nano-SiO2 (DNS) were prepared in a twin-screw extruder by melt compounding. The microstructures of dispersible nano-SiO2/PA66 composites were investigated by means of TEM and XRD, and the non-isothermal crystallization behavior was studied through Jeziorny method and Mo method based on DSC analysis. The results showed that the dispersion of DNS was uniform in PA66 matrix, which could be related to surface structure of dispersible nano-SiO2. It was found from the study of the non-isothermal crystallization kinetics that dispersible nano-SiO2 possessed a heterogeneous nucleation capability in PA66 matrix, and its addition could hinder the motion of PA66 molecular chain, lower the crystallization temperature, and prolong the crystallization time of PA66. In addition, the activation energies for non-isothermal crystallization of neat PA66 and composites were also evaluated by the Kissinger method. The result showed that the activation energies of dispersible nano-SiO2/PA66 composites were higher than that of neat PA66.

scholarly journals Crystallization kinetics of thin water films on Pt(111): effects of oxygen and carbon-monoxide adspecies

2019 ◽  
Vol 21 (3) ◽  
pp. 1123-1130 ◽  
Author(s):  
Ryutaro Souda ◽  
Takashi Aizawa
Keyword(s):  
Carbon Monoxide ◽  
Crystallization Kinetics ◽  
Nucleation And Growth ◽  
Growth Processes ◽  
Tof Sims ◽  
Water Films ◽  
Kinetics Of

The nucleation and growth processes of ice crystallites on Pt(111) and how they are influenced by O and CO adspecies are explored using TOF-SIMS, TPD, and RHEED.

Crystallization kinetics of water on graphite

2018 ◽  
Vol 20 (34) ◽  
pp. 21856-21863 ◽  
Author(s):  
Ryutaro Souda ◽  
Takashi Aizawa
Keyword(s):  
Film Thickness ◽  
Crystallization Kinetics ◽  
Deposition Temperature ◽  
Nucleation And Growth ◽  
Graphite Substrate ◽  
Initial Film ◽  
Kinetics Of

The nucleation and growth of water crystallites on a graphite substrate are discussed in terms of the initial film thickness, deposition temperature, and effects of adspecies.

In situ observation of the martensitic transformation in (Mg,Y)-PSZ

1986 ◽  
Vol 44 ◽  
pp. 500-501
Author(s):  
R-R. Lee
Keyword(s):  
Martensitic Transformation ◽  
High Strength ◽  
Nucleation And Growth ◽  
In Situ Observation ◽  
Considerable Potential ◽  
Transmission Electron ◽  
Structural Applications ◽  
Applied Stresses ◽  
Kinetics Of

Partially-stabilized ZrO2 (PSZ) ceramics have considerable potential for advanced structural applications because of their high strength and toughness. These properties derive from small tetragonal ZrO2 (t-ZrO2) precipitates in a cubic (c) ZrO2 matrix, which transform martensitically to monoclinic (m) symmetry under applied stresses. The kinetics of the martensitic transformation is believed to be nucleation controlled and the nucleation is always stress induced. In situ observation of the martensitic transformation using transmission electron microscopy provides considerable information about the nucleation and growth aspects of the transformation.

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

Kinetics of esterification of monoisopropylphenols with phosphoryl trichloride

1989 ◽  
Vol 54 (5) ◽  
pp. 1311-1317
Author(s):  
Miroslav Magura ◽  
Ján Vojtko ◽  
Ján Ilavský
Keyword(s):  
Liquid Phase ◽  
Rate Constants ◽  
Reaction Rates ◽  
Activation Energies ◽  
The Individual ◽  
Kinetics Of

The kinetics of liquid-phase isothermal esterification of POCl3 with 2-isopropylphenol and 4-isopropylphenol have been studied within the temperature intervals of 110 to 130 and 90 to 110 °C, respectively. The rate constants and activation energies of the individual steps of this three-step reaction have been calculated from the values measured. The reaction rates of the two isomers markedly differ: at 110 °C 4-isopropylphenol reacts faster by the factors of about 7 and 20 for k1 and k3, respectively. This finding can be utilized in preparation of mixed triaryl phosphates, since the alkylation mixture after reaction of phenol with propene contains an excess of 2-isopropylphenol over 4-isopropylphenol.

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.

Crystallization kinetics of compatibilized blends of polypropylene and polyethylenimine

2021 ◽  
Author(s):  
Pratim Kumar Patra ◽  
Aanchal Jaisingh ◽  
Vishal Goel ◽  
Gurpreet Singh Kapur ◽  
Leena Nebhani
Keyword(s):  
Crystallization Kinetics ◽  
Kinetics Of ◽  
Compatibilized Blends
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