Electron microscopy studies of NiAl/{gamma}-Al{sub 2}O{sub 3} interfaces
- Max-Planck-Inst. fuer Metallforschung, Stuttgart (Germany). Inst. fur Werkstoffwissenschaft
Intermetallics belong to a group of interesting materials which may find high temperature applications, such as jet turbine engines, due to their combination of desirable properties, such as low density, high melting temperature and high thermal conductivity. Their durability will depend on good corrosion resistance. NiAl is an intermetallic material which demonstrates excellent oxidation resistance due to the slow growth of Al{sub 2}O{sub 3} on its surface during high temperature oxidation. A better understanding of the oxidation mechanisms requires knowledge of the structure and composition of the intermetallic, oxide scale and interfacial region during the oxidation process. There have been several investigations of the alumina scale growth on intermetallic materials using a wide variety of techniques, such as SEM, TEM, XPS, SIMS, etc. However, there have been only a few investigations of the fundamental aspects of the initial oxide scale formation. Obviously more work is needed to elucidate the structure of NiAl and its initially formed oxide scale. With the improvement of electron microscopy sample preparation techniques, one can now examine the NiAl/oxide scale at the subnanometer level.
- OSTI ID:
- 237824
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 33, Issue 7; Other Information: PBD: 1 Oct 1995
- Country of Publication:
- United States
- Language:
- English
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