Peritectic Coupled Growth

This research project aims to get a complete fundamental understanding of metastable coupled peritectic pattern formation under purely diffusive conditions including of specific transient growth modes. The European Space Agency (ESA) has supported the corresponding METCOMP project and performed during March-Aril 2021 fifteen different solidification experiments onboard of the International Space Station (ISS) using the transparent peritectic TRIS-NPG system as metall-like solidifiying model alloy. In 2024 further experiments on the ISS are planned. At the moment the around 70.000 pictures showing the evolution of isothermal peritectic growth (IPCG) recorded during the µg-mission are under evaluation.

The primary aims and objectives of this research field are

  • To understand the formation of isothermal peritectic coupled growth (IPCG) and the impact convection might have on the occurrence of this metastable growth mode;
  • To define a suitable process window for the occurrence of IPCG;
  • To perform solidification experiments with the transparent peritectic model alloy TRIS-NPG under micro-gravity conditions on board of the International Space Station (ISS), and compare the observation with its equivalent terrestrial experiments;
  • To investigate the transition from lateral bands to IPCG and to identify transient and steady growth modes;
  • To perform phase field simulation of IPCG and suggest a theoretic framework for the physical processes that favour this metastable growth form;

Examples of oscillatory peritectic couple growth is shown in the above figure. Further details on that research field can be found in:

  • J.P. Mogeritsch, T. Pfeifer, A. Ludwig: “Formation of micro-plumes at a planar solid liquid interface in a temperature gradient”, 5th Int. Conf. on Advances in So-lidification Processes (ICASP-5) combined with 5th Int. Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining, Salzburg, Aus-tria, IOP Conference Series: Materials Science & Engi-neering, 529 (2019) 012025
  • J.P. Mogeritsch, A. Ludwig: “Investigation on Peritectic Layered Structures by Using the Binary Organic Com-ponents TRIS-NPG as Model Substances for Metal-Like Solidification”, Res. & Dev. Materials Sci. 4 (2018) 1-3
  • J.P. Mogeritsch, A. Ludwig: “Investigation on the Binary Organic Components TRIS-NPG as Suitable Model Substances for Metal-Like Solidification”, 7th Int. Conf. Solidification and Gravity (SG 2018), Miskolc, Hungary, pp. 330-5.
  • J.P. Mogeritsch, T. Pfeifer, M. Stefan-Kharicha, A. Ludwig: “Investigation on the Liquid Flow ahead of the Solidification Front During the Formation of Peritectic Layered Solidification Structures”, 7th Int. Conf. on So-lidification and Gravity (SG 2018), Miskolc, Hungary, pp. 319-24.
  • A. Ludwig, J.P. Mogeritsch, T. Pfeifer: “In-situ observa-tion of coupled peritectic growth in a binary organic model alloy”, Acta Mater. 126 (2017) 329-35.
  • A. Ludwig, J.P. Mogeritsch: “Compact seaweed growth of peritectic phase on confined, flat properitectic den-drites”, J. Crystal Growth 455 (2016) 99–104.
  • J.P. Mogeritsch, A. Ludwig: “In-situ observation of the dynamic of peritectic coupled growth using the binary organic system TRIS-NPG”, 14th Modeling of Casting, Welding and Adv. Solidification Processes, (MCWASP XIV), Awaji island, Hyogo, Japan, 21-26 June (2015), Ed.: H. Yasuda, IOP Conf. Series: Materials Science and Engineering 84 (2015) 012055.
  • A. Ludwig, J.P. Mogeritsch: “Recurring instability of cellular growth in a near peritectic transparent NPG-TRIS alloy system”, Mater. Sci. Forum, 790-1 (2014) 317-22.
  • A. Ludwig, J.P. Mogeritsch, M. Kolbe, Z. Gerhard, L. Sturz, N. Bergeon, G. Faivre, B. Billia, S. Akamatsu, S. Bottin-Rousseau, D. Voss: “Adv. Solidification Studies on Transparent Alloy Systems: A New European Solidification Insert for Material Science Glovebox on Board the Int. Space Station”, JOM 64 (2012) 1097-101.

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