Abstract
The growth of oxide on Fe-Cr alloys, containing 3, 9, 12 and 18 wt.%Cr has been investigated both in-situ and ex-situ with electron microscopy using a Hitachi HU-650B HVEM and a Philips EM400T. Some specimens were electrochemically polished and oxidized at 700 to 800°C in 10-3 torr of air or 20 torr of dry oxygen; others were oxidized and then back-thinned to electron transparency. Fe3O4 containing trace amounts of Cr was observed to nucleate on the 3%Cr specimens while M3O4 (M = Fe, Cr) and/or ϒ-M2O3 nucleated on the higher Cr specimens.
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Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
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