The feedback control of the vertical Bridgman crystal growth process by crucible rotation: two case studies

Sonda, Paul; Yeckel, Andrew; Derby, Jeffrey J.; Daoutidis, Pródromos

doi:10.1016/j.compchemeng.2004.09.013

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…In Refs [157,158] Sonda, Yeckel, and Derby present a model-based approach for controlling the melt flow. In their system, the meridional melt speed S is used as the controlled variable.…”

Section: Flow Speed Controlmentioning

confidence: 99%

Automation of Crystal Growth from Melt

Winkler

Neubert

2015

Handbook of Crystal Growth

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“…In Refs [157,158] Sonda, Yeckel, and Derby present a model-based approach for controlling the melt flow. In their system, the meridional melt speed S is used as the controlled variable.…”

Section: Flow Speed Controlmentioning

confidence: 99%

Automation of Crystal Growth from Melt

Winkler

Neubert

2015

Handbook of Crystal Growth

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“…Thus far, researchers have had to rely on simulations of the process (e.g. Brandon & Derby, 1992;Sonda et al, 2005) that can only be validated indirectly. Obviously, the methods for in situ characterization should be non-destructive, capable of remote sensing and of sufficient temporal resolution.…”

Section: Introductionmentioning

confidence: 99%

In situdiagnostics of the crystal-growth process through neutron imaging: application to scintillators

et al. 2016

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The unique possibilities enabled by neutron imaging for in situ remote diagnostics of microstructural characteristics during crystal growth are demonstrated, even when the materials and surrounding structures are opaque to other more conventional interrogation techniques. Neutron radiography is implemented to image remotely the uniformity of elemental distribution (e.g. dopant concentration) during crystal growth, the location of the liquid/solid interface and the presence of macroscopic crystal defects (e.g. cracks), all with a temporal resolution of 5–7 s.

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“…Recent advances in computer models for growth processes in the vertical gradient furnace have been useful in understanding the general effects of furnace operating conditions on the growth of crystals [6]. As such, computer models have become a valuable tool in furnace design and the optimization of operating conditions [7][8][9][10][11]. At the same time, most existing models use a simplistic description of the crystal/melt interface and its dynamic.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional phase field model coupled with a lattice kinetics solver for modeling crystal growth in furnaces with accelerated crucible rotation and traveling magnetic field

Lin

Bao

2014

Computers & Fluids

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In this study, we present a new three-dimensional numerical model for crystal growth in a vertical solidification system. This model accounts for buoyancy, accelerated crucible rotation technique (ACRT), and traveling magnetic field (TMF) induced convective flow and their effect on crystal growth and the chemical component's transport process. The evolution of the crystal growth interface is simulated using the phase-field method. A semi-implicit lattice kinetics solver based on the Boltzmann equation is employed to model the unsteady incompressible flow. A one-way coupled concentration transport model is used to simulate the component fraction variation in both the liquid and solid phases, which can be used to check the quality of the crystal growth. Numerical results indicate that ACRT can slightly increase the quality of grown crystal, but the effect of TMF on quality of grown crystal depends on the temperature profile of the ampoule wall. Finally, excellent scalability of our developed parallel methods is demonstrated on the three-dimensional cases.

show abstract

The feedback control of the vertical Bridgman crystal growth process by crucible rotation: two case studies

Cited by 8 publications

References 19 publications

Automation of Crystal Growth from Melt

Automation of Crystal Growth from Melt

In situdiagnostics of the crystal-growth process through neutron imaging: application to scintillators

A three-dimensional phase field model coupled with a lattice kinetics solver for modeling crystal growth in furnaces with accelerated crucible rotation and traveling magnetic field

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