We present a derivation of the recently proposed eighth-order phase-field crystal model [A. Jaatinen, Phys. Rev. E 80, 031602 (2009)] for the crystallization of a solid from an undercooled melt. The model is used to study the planar growth of a two-dimensional hexagonal crystal, and the results are compared against similar results from dynamical density functional theory of Marconi and Tarazona...

The Campanian Ignimbrite is a 4200 km trachyte^phonolite pyroclastic deposit that erupted at 39 3 0 1ka within the Campi Flegrei west of Naples, Italy. Here we test the hypothesis that Campanian Ignimbrite magma was derived by isobaric crystal fractionation of a parental basaltic trachyandesitic melt that reacted and came into local equilibrium with small amounts (5^10 wt%) of crustal rock (ska...

2014 Convective transport is well known to have a decisive influence on the macrosegregation encountered in metallic or semi-conductor crystals grown from an impure or doped melt. In the present paper, this problem is studied with the help of an order of magnitude analysis of the set of balance equations for mass, momentum and solute in the melt and at the growth interface. The different solute...

The crystal growth rate of LiGe2(PO4)3 phase from lithium germanium-phosphate glass was studied. have been homogenized using the previously established temperature-time conditions, which make it possible to remove volatile substances melt. atomic absorption spectrophotometry (AAS) used determine chemical content obtained and scanning electron microscope (SEM) were reveal isothermal process grow...

Herein, the effect of shear flow on growth columnar crystals in an undercooled melt is studied. The asymptotic method used to solve dynamic model for a crystal. resulting solution shows that significantly changes interface morphology With forced flow, rate increases direction flow. As further increases, crystal seriously deformed and distorted. causes tend evolve into smaller initial stage grow...

High quality single crystal silicon-germanium-on-insulator has the potential to facilitate the next generation of photonic and electronic devices. Using a rapid melt growth technique we engineer tailored single crystal silicon-germanium-on-insulator structures with near constant composition over large areas. The proposed structures avoid the problem of laterally graded SiGe compositions, caused...

Crystallization coupled with gravity removal of depleted interstitial melt has long been recognized as a mechanism of magma differentiation. Similarly, heat released by synplutonic basaltic magma intrusions has long been recognized as capable of driving convection in granite chambers. Direct evidence of these processes has seldom been described in granites. In the Tavares pluton, we mapped a nu...

Significant quantities of shock-induced melt are predicted to form during basin-scale impact events and may contribute substantially to compositional variation in the lunar crust through differentiation processes. Knowledge of the evolution of impact melt sheets and the cooling and crystallization processes involved is therefore important to understanding the geology and petrology of the Moon. ...

One of the greatest technological and scientific challenges of crystal growth is to achieve homogeneity of the material properties (e.g. electrical resistance in the micro range). According to the present know-how, the cause of fluctuations of the electrical resistance is due to fluctuations of the growth rate of the crystal. One of the possible causes for fluctuations of the growth rate is the...

Controlling crystal nucleation and growth leading to formation of nano structures by an original flux treatment method mainly in calcia and magnesia crucibles followed by water-cooling allowed production of Ti45Cu45Fe10 bulky nanostructured alloy of 16mm in diameter. Since a glass forming ability (GFA) of the alloy composition is low, the alloy could not form an amorphous structure even by a co...