| Oxidation Behavior of Pd-Modified Aluminide Coating at High Temperature |
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| 作者姓名： | MengjinLI XiaofengSUN HengrongGUAN XiaoxiaJIANG ZhuangqiHU |
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| 作者单位： | StateKeyLaboratoryforCorrosionandProtection,InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China |
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| 摘 要： | (Ni,Pd)Al coating, prepared by low pressure pack cementation on the Ni-base superalloy M38 where Pd-20 wt pct Ni alloy was predeposited, consists of a single β-(Ni,Pd)Al phase. The initial isothermal oxidation behavior of (Ni,Pd)Al coating was investigated by TGA, XRD, SEM/EDS at 800～1100℃. Results show that oxidation kinetics accord preferably with parabolic law at 800, 900 and 1100℃, but not at 1000℃.θ-Al2O3 was observed at 800～1100℃. It is found that Pd plays an important role in accelerating the diffusion of Ti from the substrate to the coating surface in the aluminide coating.
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| 关 键 词： | 钯 铝 镍合金 动力学 钛 超耐热合金 |
Oxidation Behevior of Pd-Modified Aluminide Coating at High Temperature |
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| MengjinLI XiaofengSUN HengrongGUAN XiaoxiaJIANG ZhuangqiHU.Oxidation Behavior of Pd-Modified Aluminide Coating at High Temperature[J].Journal of Materials Science & Technology,2003,19(3):213-217. |
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| Authors: | Mengjin LI Xiaofeng SUN Hengrong GUAN Xiaoxia JIANG Zhuangqi HU |
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| Affiliation: | State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | (Ni,Pd)Al coating, prepared by low pressure pack cementation on the Ni-base superalloy M38 where Pd-20 wt pct Ni alloy was predeposited, consists of a single β-(Ni,Pd)Al phase. The initial isothermal oxidation behavior of (Ni,Pd)Al coating was investigated by TGA, XRD, SEM/EDS at 800-1100℃. Results show that oxidation kinetics accord preferably with parabolic law at 800, 900 and 1100℃, but not at 1000℃. β-Al2O3 was observed at 800-1100℃. It is found that Pd plays an important role in accelerating the diffusion of Ti from the substrate to the coating surface in the aluminide coating. |
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| Keywords: | (Ni Pd)Al coating High temperature oxidation Oxidation kinetics |
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