INFLUENCE OF Y,Ce AND La ON HIGH TEMPERATURE SULFIDATION OF Fe-25Cr-40Ni SUPERALLOY

Acta Metall Sin

1989, Vol. 25

Issue (4): 89-93 DOI:

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INFLUENCE OF Y,Ce AND La ON HIGH TEMPERATURE SULFIDATION OF Fe-25Cr-40Ni SUPERALLOY

HUANG Yuanwei;HAN Yong;SUN Lanxiang;XU Zhiqiang;SHI Shengtai S. T. Shih Shanghai Institute of Metallurgy; Academia Sinica

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HUANG Yuanwei;HAN Yong;SUN Lanxiang;XU Zhiqiang;SHI Shengtai S. T. Shih Shanghai Institute of Metallurgy; Academia Sinica. INFLUENCE OF Y,Ce AND La ON HIGH TEMPERATURE SULFIDATION OF Fe-25Cr-40Ni SUPERALLOY. Acta Metall Sin, 1989, 25(4): 89-93.

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Abstract The effects of Y, Ce and La on the sulfidation of alloy Fe-25Cr-40Nihave been investigated. The sulfidation rate of the alloys with RE more than 0.1wt-% is lower than that of the base alloy. The addition of Y is more effectivethan La and Ce in lowering the sulfidation rate. Based on the analyses of the struc-ture and composition of the sulfide scales. The sulfidation mechanism of the al1oyswith RE has been proposed.

Key words: sulfidation rare-earth sulfide scale sulfidation rate

Received: 18 April 1989

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