Abstract
The oxidation behaviour of austenite stainless steel in vacuum and the evolution of oxide scales during vacuum hot-compression bonding were investigated combining XPS and TEM. The results indicate that thick duplex oxide scale with outer MnFe2O4 and inner FeCr2O4 layer was formed in a low vacuum and the complex oxide scale transformed into interfacial oxides MnCr2O4 remaining at the bonding interface after hot-compression bonding at 1200 °C. While in a high vacuum, nanoscale-thick oxide scale with outer Fe3O4 and inner Fe- and Cr-rich layer was observed and it decomposed during the subsequent hot-compression bonding procedure, leading to a well-bonded interface.
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