Memorias de investigación
Artículos en revistas:
Wetting behavior and reactivity of molten silicon with h-BN substrate at ultrahigh temperatures up to 1750 °C
Año:2017
Áreas de investigación
  • Silicio
Datos
Descripción
For a successful implementation of newly proposed silicon-based latent heat thermal energy storage systems, proper ceramic materials that could withstand a contact heating with molten silicon at temperatures much higher than its melting point need to be developed. In this regard, a non-wetting behavior and low reactivity are the main criteria determining the applicability of ceramic as a potential crucible material for long-term ultrahigh temperature contact with molten silicon. In this work, the wetting of hexagonal boron nitride (h-BN) by molten silicon was examined for the first time at temperatures up to 1750 °C. For this purpose, the sessile drop technique combined with contact heating procedure under static argon was used. The reactivity in Si/h-BN system under proposed conditions was evaluated by SEM/EDS examinations of the solidified couple. It was demonstrated that increase in temperature improves wetting, and consequently, non-wetting-to-wetting transition takes place at around 1650 °C. The contact angle of 90° ± 5° is maintained at temperatures up to 1750 °C. The results of structural characterization supported by a thermodynamic modeling indicate that the wetting behavior of the Si/h-BN couple during heating to and cooling from ultrahigh temperature of 1750 °C is mainly controlled by the substrate dissolution/reprecipitation mechanism.
Internacional
Si
JCR del ISI
Si
Título de la revista
Journal of Materials Engineering and Performance
ISSN
1059-9495
Factor de impacto JCR
1,331
Información de impacto
Volumen
DOI
Número de revista
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1
Hasta la página
14
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Participantes
  • Autor: W. Polkowski
  • Autor: N. Sobczak
  • Autor: R. Nowak
  • Autor: A. Kudyba
  • Autor: G. Bruzda
  • Autor: A. Polkowska
  • Autor: M. Homa
  • Autor: P. Turalska
  • Autor: M. Tangstad
  • Autor: J. Safarian
  • Autor: E. Moosavi-Khoonsari
  • Autor: Alejandro Datas Medina UPM
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Silicio y Nuevos Conceptos para Células Solares