OXIDATION RESISTANCE OF Fe_3Al INTERMETALLICS AT HIGH TEMPERATURES

Acta Metall Sin

1998, Vol. 34

Issue (11): 1131-1136 DOI:

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OXIDATION RESISTANCE OF Fe_3Al INTERMETALLICS AT HIGH TEMPERATURES

SUN Yangshan;YU Xinquan;HUANG Haibo;SUN Guoxiong (Department of Materials Science and Engineering; Southeast University; Nanjing 210096)

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SUN Yangshan;YU Xinquan;HUANG Haibo;SUN Guoxiong (Department of Materials Science and Engineering; Southeast University; Nanjing 210096). OXIDATION RESISTANCE OF Fe_3Al INTERMETALLICS AT HIGH TEMPERATURES. Acta Metall Sin, 1998, 34(11): 1131-1136.

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Abstract

The oxidation resistance of the binary Fe3Al decreases rapidly with the increase of temperature when the temperature is above 1000℃. SEM observations have revealed wisker-shaped oxides on specimen surface oxidized at 1200℃. Cavities and internal oxidation have been observed between the oxidation layer and the matrix of oxidized specimen. Microalloying of Ce increases the oxidation resistance of Fe3Al based alloys significantly. After oxidizing at 1200℃ for a long time (120 h), the specimen surface of the Fe3Al alloy containing cerium is still smooth without spalling and its oxidation resistance is one order of magnitude higher than that of the alloy without cerium addition.

Key words: Fe_3Al intermetallics oxidation cerium Fe_3Al intermetallics oxidation cerium

Received: 18 November 1998

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1998/V34/I11/1131

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