A comparative study of thermal and thermosolutal convective effects in vertical Bridgman crystal growth

Rouzaud, A.; Camel, D.; Favier, J.J.

doi:10.1016/0022-0248(85)90341-0

Cited by 65 publications

(16 citation statements)

References 34 publications

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“…As already discussed in [21], the calculations show that, for sufficiently low driving forces, relation (5b) applies with Gr defined from the radius of the sample and the maximum radial temperature difference and K N 30.…”

supporting

confidence: 63%

Scaling analysis of convective solute transport and segregation in Bridgman crystal growth from the doped melt

Camel

Favier

1986

J. Phys. France

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supporting

confidence: 63%

Scaling analysis of convective solute transport and segregation in Bridgman crystal growth from the doped melt

Camel

Favier

1986

J. Phys. France

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“…The results derived from the FZ solidification experiments support the findings of diffusion controlled segregation profiles during directional solidification [38][39][40]. In spite of the rather slow processing speed, it seems that the mixing of the melt is not complete.…”

Section: Gravity Effectssupporting

confidence: 76%

“…The experiments were performed with Ge-rich material and the thickness of the k-layer in front of the phase boundary was found to be larger than the characteristic length D/v (D diffusion constant, v solidification velocity), which, in the present case, has a value of 3cm. On the other hand, recent investigations revealed segregation curves close to those expected under the assumption of complete mixing of the melt [41], though the solidified samples had similar shapes and compositions to those in [38]. Segregation curves obtained are shown in Fig.…”

Section: Bridgman Methodsmentioning

confidence: 75%

“…Thus the possible mechanism responsible for the contradictory results can only be found in different radial temperature variations. In [41] the deflection of the phase boundary is equivalent to a radial temperature gradient of about 20 K/cm whereas in [38] radial temperature gradients between 2 and 7 K/cm are reported. Employing a model that compares the flow speeds (in respect to growth velocity) of the two situations, one finds that in the first case concentration differences are washed out quickly and the flow is driven by the thermal field only.…”

Section: Gravity Effectsmentioning

confidence: 99%

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Bulk growth of silicon-germanium solid solutions

Schilz¹,

Romanenko

1995

J Mater Sci: Mater Electron

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This paper provides an overview of the technology for growing bulk silicon-germanium solid solutions and of the structural properties of the solidified materials. It is an attempt to summarize and value the methods and efforts applied to the controlled crystallization of silicon-germanium melts which were employed during the last four decades. The especially high degree of segregation makes the system sensitive to small changes of growth conditions, which leads to inhomogeneities and strain. The future availability of homogeneous, low-defect Si-Ge crystals through the whole composition range is briefly discussed.

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“…This model was originally developed to study salinity gradients but has been shown to be applicable to nondilute crystal growth systems. 17 Hart solves the linearized forms of equations 4, 7 and 8 in terms of a single solution parameter dependent only on the solutal Raleigh number, M = (-0.25Ras)_.…”

Section: 1mentioning

confidence: 99%

<title>Convective influence on radial segregation during unidirectional solidification of the binary alloy HgCdTe</title>

Watring

Gillies

Lehoczky

et al. 1996

Space Processing of Materials

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In order to simulate the space environment for basic research into the crystal growth mechanism, Hgo.sCdo.2Te crystals were grown by the vertical Bridgman-Stockbarger method in the presence of an applied axial magnetic field. The influence of convection, by magneto hydrodynamic damping, on mass transfer in the melt and segregation at the solid-liquid interface was investigated by measuring the axial and radial compositional variations in the grown samples.The reduction of convective mixing in the melt through the application of the magnetic field is found to have a large effect on radial segregation and interface morphology in the grown crystals. Direct comparisons are made with a Hgo.sCdo.2Te crystal grown without field and also in the microgravity environment of space during the second United States Microgravity Payload Mission (USMP-2).

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A comparative study of thermal and thermosolutal convective effects in vertical Bridgman crystal growth

Cited by 65 publications

References 34 publications

Scaling analysis of convective solute transport and segregation in Bridgman crystal growth from the doped melt

Scaling analysis of convective solute transport and segregation in Bridgman crystal growth from the doped melt

Bulk growth of silicon-germanium solid solutions

<title>Convective influence on radial segregation during unidirectional solidification of the binary alloy HgCdTe</title>

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