Local melting in silicon driven by retrograde solubility

D. P. Fenning, B. K. Newman, Mariana Bertoni, S. Hudelson, S. Bernardis, M. A. Marcus, S. C. Fakra, T. Buonassisi

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

High point-defect enthalpy of formation leads to retrograde solubility for a number of solutes in silicon, especially d-shell transition metals. We present direct experimental evidence for a thermodynamic pathway leading to local retrograde melting in silicon driven by the retrograde solubility of low-concentration metallic solutes at temperatures above the bounding liquid-silicide-silicon invariant reaction. We experimentally demonstrate this local melting pathway using in situ synchrotron-based X-ray microprobe measurements of silicon supersaturated with nickel, wherein solute precipitation into liquid droplets is observed. No significant energy barrier is observed for the nucleation of the liquid droplets at the surface, suggesting that in the Ni-Si system, retrograde melting will occur upon supersaturation if favorable heterogeneous nucleation sites are available.

Original languageEnglish (US)
Pages (from-to)4320-4328
Number of pages9
JournalActa Materialia
Volume61
Issue number12
DOIs
StatePublished - Jul 2013
Externally publishedYes

Fingerprint

Silicon
Melting
Solubility
Liquids
Nucleation
Supersaturation
Energy barriers
Point defects
Nickel
Synchrotrons
Transition metals
Enthalpy
Thermodynamics
X rays
Temperature

Keywords

  • Melting
  • Nickel
  • Precipitation
  • Retrograde melting
  • Silicon

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Electronic, Optical and Magnetic Materials

Cite this

Fenning, D. P., Newman, B. K., Bertoni, M., Hudelson, S., Bernardis, S., Marcus, M. A., ... Buonassisi, T. (2013). Local melting in silicon driven by retrograde solubility. Acta Materialia, 61(12), 4320-4328. https://doi.org/10.1016/j.actamat.2013.03.037

Local melting in silicon driven by retrograde solubility. / Fenning, D. P.; Newman, B. K.; Bertoni, Mariana; Hudelson, S.; Bernardis, S.; Marcus, M. A.; Fakra, S. C.; Buonassisi, T.

In: Acta Materialia, Vol. 61, No. 12, 07.2013, p. 4320-4328.

Research output: Contribution to journalArticle

Fenning, DP, Newman, BK, Bertoni, M, Hudelson, S, Bernardis, S, Marcus, MA, Fakra, SC & Buonassisi, T 2013, 'Local melting in silicon driven by retrograde solubility', Acta Materialia, vol. 61, no. 12, pp. 4320-4328. https://doi.org/10.1016/j.actamat.2013.03.037
Fenning DP, Newman BK, Bertoni M, Hudelson S, Bernardis S, Marcus MA et al. Local melting in silicon driven by retrograde solubility. Acta Materialia. 2013 Jul;61(12):4320-4328. https://doi.org/10.1016/j.actamat.2013.03.037
Fenning, D. P. ; Newman, B. K. ; Bertoni, Mariana ; Hudelson, S. ; Bernardis, S. ; Marcus, M. A. ; Fakra, S. C. ; Buonassisi, T. / Local melting in silicon driven by retrograde solubility. In: Acta Materialia. 2013 ; Vol. 61, No. 12. pp. 4320-4328.
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