Acta Metall Sin  1998, Vol. 34 Issue (11): 1158-1162    DOI:

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MECHANISM OF IMPROVING THE COHERENCE BETWEEN OXIDE SCALE AND SUBSTRATE OF Ni_3Al BASE ALLOY IC6 BY YTTRIUM

XIAO Chengbo;HAN Yafang (Beijing institute of Aeronautical Materials; Beijing 100095)

XIAO Chengbo;HAN Yafang (Beijing institute of Aeronautical Materials; Beijing 100095). MECHANISM OF IMPROVING THE COHERENCE BETWEEN OXIDE SCALE AND SUBSTRATE OF Ni_3Al BASE ALLOY IC6 BY YTTRIUM. Acta Metall Sin, 1998, 34(11): 1158-1162.

Abstract References Related Articles Recommended Metrics Download:  PDF(1642KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The oxidation resistance of Ni3Al base alloy IC6 with different amounts of yttrium at 1100℃ was determined. The results showed that the coherence between the oxide scale and the substrate is substantially improved by adding 0.04% -0.30%Y. The results of the X-ray line scan of EPMA showed that a diffusion layer rich in Ni, Mo and poor in Al is formed during the oxidation process, and that segregation of sulfur to the interface between the oxide scale and the substrate is inhibited by yttrium, which results in the improvement of the coherence between the oxide scale and the substrate. The results of X-ray diffraction analysis of the spalled oxides showed that yttrium can promote the slective oxidation of aluminum and hence improve the high temperature oxidation resistance of alloy IC6. Key words:  Ni_3Al      high temperature oxidation      yttrium      Received:  18 November 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I11/1158 1 PfeilL B U K、Patent No.459848,1937 2McDonald J E,Eberhart J G.Trans Metall Soc AIME,1965;233:512 3Funkenbusch A W,Smeggil J G,Bormsten N S.Metall Trans A,1985;16A(6):1164 4 Alexander J. mater Sci Tech,1985;1(2):167 5Antill J E,Peakall K A.J Iron STeel Inst, 1967;205:1136 6 Francies J M,Juston J A、Corros Sci,1968;8:445 7 Tien J K, Pettit F S Metall Trans, 1972 3: 1587 8 Allam I A,Whittle D P, Stringer J. Oxid Met;1978;12:35 9 Kuenzly J D, Douglass D L.Oxid Met,1974;8:139 10Lustmann B Trans Metall Soc AIME,1950;188:995 11Wukusick C S,Collins J F.Mater Res Stand,1964;4:637 12Huntz A M.In:Lang E ed.The Role of Active Elements in Oxidation Behaviour of Metals and Alloys. 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