Crystallization kinetics and polymorphic transformations in polybutene-1

Crystallization Kinetics Study in Al87Ni10La3 Amorphous Alloy

In this study, the crystallization behavior of melt-spun Al87Ni10La3 amorphous phase was investigated by using X-ray diffraction and non-isothermal differential thermal analysis techniques. The results demonstrated that the amorphous phase exhibited two-stage crystallization on heating, i.e., at first step the amorphous phase transforms into α-Al phase and at second step Al11La3 and Al3Ni inter...

Crystallization kinetics and network rigidity

Kinetics of crystal growth in non-isochemical systems is considered taking into account the changes in composition of the residual melt during the process. This leads to the formation of concentration gradients in the vicinity of the new phase. If a component acting as a network modifier is enriched in the crystalline phase, the melt at the interface is enriched in network formers and the glass...

Crystallization kinetics of glasses

Thermophysical bases of vitrification and crystallization are discussed in terms of the enthalpy versus temperature diagram and its derivative (DTA) illustrating relaxation and glass transformation as well as crystallization of glassy and amorphous states to form stable and metastable phases. Non-isothermal kinetics are thoroughly discussed and the use of one(JMAEK) and two(SB) parameter equati...

Preferential Nucleation during Polymorphic Transformations

Polymorphism is the ability of a solid material to exist in more than one phase or crystal structure. Polymorphism may occur in metals, alloys, ceramics, minerals, polymers, and pharmaceutical substances. Unresolved are the conditions for preferential nucleation during polymorphic transformations in which structural relationships or special crystallographic orientation relationships (OR's) form...

The Polymorphic Transformations of Obelia