MEMS-based in situ Electron-Microscopy Investigation of Rapid Solidification and Heat Treatment on Eutectic Al-Cu

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External Organisational units

  • Erich Schmid Institute of Materials Science
  • Los Alamos National Laboratory


The solidification behavior of a eutectic AlCu specimen is investigated via in situ scanning transmission electron microscope (STEM) experiments. Solidification conditions are varied by imposing various cooling conditions via a micro-electro-mechanical system (MEMS) based membrane. The methodology allows the use of material processed by a melting and casting route close to industrial metallurgically fabricated ma- terial for in situ STEM solidification studies. Different rapid solidification morphologies could be obtained solely on a single specimen by the demonstrated strategy. Additional post-solidification heat treatments are investigated in terms of observation of spheroidization of lamellas during annealing at elevated tem- peratures.


Original languageEnglish
Article number118225
Number of pages9
JournalActa Materialia
Publication statusPublished - 3 Aug 2022