Acta Metall Sin  1995, Vol. 31 Issue (15): 109-115    DOI:

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EFFECT OF GRAIN SIZE ON OXIDATION BEHAVIOUR OF Ni_3Al-Zr BASE ALLOY AT ELEVATED TEMPERATURE

YE Changjiang; LI Tiefan; ZHOU Longjiang (Corrosion Science Lab.;Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015)

YE Changjiang; LI Tiefan; ZHOU Longjiang (Corrosion Science Lab.;Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015). EFFECT OF GRAIN SIZE ON OXIDATION BEHAVIOUR OF Ni_3Al-Zr BASE ALLOY AT ELEVATED TEMPERATURE. Acta Metall Sin, 1995, 31(15): 109-115.

Abstract References Related Articles Recommended Metrics Download:  PDF(585KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The oxidation behaviour of Ni-11.82Al-1.03Zr-0.1B(wt-%) alloy with grain sizes of 30 μm and 180 μm was investigated at 900, 1100℃ in air. The short-circuit path for rapid diffusion along grain boundary is responsible for the change in the oxidation rate. At 900℃.with decreasing grain size.the oxidation rate of Ni-11.82Al-1.03Zr-0.1B alloy lowered; at 1100℃, grain size did not affect it. The structure and composition of the oxide scale were examined by EPMA and XRD analyses. which confirmed that the oxide layers formed on the two specimens are the same, containing NiO(outer), Al_2O_3, NiAl_2O_4(inner). The reactive element effect of Zr caused that the scale-alloy interface distinctly showed a different shape. a wavy interface(900℃) and a tree-like interface(1100℃). Key words:  Ni_3Al      oxidation behaviour      grain size      reactive element effect      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/Y1995/V31/I15/109 1MerzHD,MetallTrans,1979:10A:712BasuSN,YauerkGJ．OxidMet,1991:35:4413GrigginsCS,PettitFS．TransMetallAIME,1969:245:25094GoedjenJG．ShoresDA．OxidMet,1992:37:1255TakeyamaM,LiuCT．ActaMetall,1989:37:26816TakeyamaM,LiuCT．ScriptaMetall,1989:23:7277WangF,LouH．MaterSciTechnol,1990:6:618LouH．WangF．XiaB．ZhangL,OxidMet,1992:38:2999SinghRamanRK,KhenmaAS．TiwariRK．GnanamoorthyJB．OxidMet,1992;37:110SinghRamanRK,GnamamoorthySB,RoySK．OxidMet,1993:40:2111AheF．ArakiH．YoshidaH．OkadM．WatanadeM．CorrosSci,1981:21:81912刘国勋．金属学原理．北京:冶金工业出版社,1987:7313BriksN,MeirerGH．IntroductiontohighTemperatureOxidationofMetals．NewYork:EdwardArnold,1983:9314BarretCA．KhanAS．LowellCE．JElectrochemSoc,1981;128:2515ReddyKPR,SmialekJL,CooperAR．OxidMet,1982;17:42916SeitzF．AdvancePhys,1952;1:1317DoychkJ．RuhleM．OxidMet,1989;31:431 [1] LI Fulin, FU Rui, BAI Yunrui, MENG Lingchao, TAN Haibing, ZHONG Yan, TIAN Wei, DU Jinhui, TIAN Zhiling. 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