Investigation of Peritectic Solidification Morphologies by Using the Binary Organic Model System TRIS-NPG

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Abstract

Under pure diffusive growth conditions, layered peritectic solidification is possible. In reality, the competitive growth of the primary α-phase and the peritectic β-phase revealed some complex peritectic solidification morphologies due to thermo-solutal convection. The binary organic components Tris-(hydroxylmenthyl) aminomethane-(Neopentylglycol) were used as a model system for metal-like solidification. The transparency of the high-temperature non-faceted phases allows for the studying of the dynamic of the solid/liquid interface that lead to peritectic solidification morphologies. Investigations were carried out by using the Bridgman technic for process conditions where one or both phases solidify in a non-planar manner. Different growth conditions were observed, leeding to competitive peritectic growth morphologies. Additionally, the competitive growth was solved numerically to interpret the observed transparent solidification patterns.
OriginalspracheEnglisch
Aufsatznummer966
Seitenumfang16
FachzeitschriftMaterials
Jahrgang13.2020
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 21 Feb. 2020

Bibliographische Notiz

Funding Information:
Funding: This research was supported in part by the European Space Agency ESA (ESTEC Contract No. 14243/00/NL/SH) through means of the ESA map project METCOMP and in part by the Austrian Space Agency ASA within the frame of the METTRANS-ISS project.

Publisher Copyright:
© 2020 by the authors.

Schlagwörter

  • peritectic solidification
  • ESA
  • TRIS-NPG
  • Bridgman-furnace
  • MICRESS

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