High-temperature air oxidation of coatings based on eutectic (β-NiAl + γ-Re) alloys and NiAl intermetallide |
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| Authors: | V. E. Oliker M. Yu. Barabash E. F. Grechishkin I. I. Timofeeva T. Ya. Gridasova |
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| Affiliation: | (1) Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev |
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| Abstract: | High-temperature air oxidation (up to 1100°C) of detonation coatings made of NiAl intermetallide and eutectic (β-NiAl + γ-Re) alloys is examined with x-ray diffraction and electron microscopy. A substantial difference between the air oxidation mechanisms of these coatings is revealed. The key factor that governs the air oxidation of these coatings is the ratio between rates at which aluminum and nickel oxides are formed. __________ Translated from Poroshkovaya Metallurgiya, Vol. 46, No. 3–4 (454), pp. 86–95, 2007. |
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| Keywords: | nickel aluminum intermetallide eutectic alloy high-temperature oxidation surface structure |
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