The Al/MgO couple was produced in vacuum (~5×10−4Pa) by contact heating from RT up to 1000°C and holding at that temperature for 1h of a small 4×4×4mm aluminium (5N) sample placed on the  MgO single crystal substrate. TEM observations backed with electron diffraction analysis indicated that the interaction between liquid aluminium and MgO starts from a redox reaction producing a continuous layer...
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