The effects of ACRT on melt undercooling during the growth of CZT via the traveling heater method: Ekman versus Taylor-Görtler flows

Peterson, Jeffrey Hammett; Derby, Jeffrey J.

doi:10.1016/j.jcrysgro.2021.126409

Title: The effects of ACRT on melt undercooling during the growth of CZT via the traveling heater method: Ekman versus Taylor-Görtler flows

Journal Article · Mon Nov 01 00:00:00 EDT 2021 · Journal of Crystal Growth

DOI:https://doi.org/10.1016/j.jcrysgro.2021.126409· OSTI ID:1829662

^[1]; Derby, Jeffrey J. ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Univ. of Minnesota, Minneapolis, MN (United States)

For the first time, a comprehensive model for the traveling heater method, including detailed species transport and phase-change thermodynamics, is applied to understand the effects of accelerated crucible rotation (ACRT) on the growth of cadmium zinc telluride. Here, a rotation schedule that is designed from classical considerations does not completely mix the melt, rather undercooled regions of localized melt are swept periodically across the growth interface. Even without melt homogenization, these ACRT-driven flows disrupt the persistent undercooling that occurs during THM growth without rotation. An ACRT schedule designed to promote Ekman flows results in lower levels of melt undercooling than a schedule designed to promote Taylor-Görtler flows and greater mixing.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

Grant/Contract Number:: 89233218CNA000001; DMR-10007885

OSTI ID:: 1829662

Report Number(s):: LA-UR-21-29740

Journal Information:: Journal of Crystal Growth, Vol. 577; ISSN 0022-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: The effects of ACRT on melt undercooling during the growth of CZT via the traveling heater method: Ekman versus Taylor-Görtler flows

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