| Oxidation behaviors of Ni-Cr-Al superalloy foams at 1 000 ℃ in air |
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| 作者姓名： | 汤慧萍 王岩 刘咏 李维杰 韩朝 |
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| 作者单位： | [1] State Key Laboratory of Porous Metals Materials, Northwest Institute for Nonferrous Metal Research,Xi＆#39;an 710016, China [2] School of Aeronautics and Astronautics, Central South University, Changsha 410083, China [3] State Key Laboratory of Powder Metallurgy（Central South University）, Changsha 410083, China [4] Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia |
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| 基金项目： | Project（51134003） supported by the National Natural Science Foundation of China |
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| 摘 要： | The oxidation behaviors of Ni-16Cr-xAl （x=4.5%, 9.0%, mass fraction） superalloy foams in air at 1000℃ were investigated. The effects of AI content on the resistance to high temperature oxidation were examined. The oxidation mechanisms of the foams were discussed. The results show that the resistance to the oxidation of the Ni-16Cr-xA1 based alloy at 1 000 ℃ increases with the content of A1 increasing from 4.5% to 9.0%. Complex oxide products are formed on the surface of the superalloy foams after the oxidation. Cr203 and A1203 are the predominant oxides for the scales of the foams with 4.5% A1 and 9% A1, respectively. Excellent high temperature oxidation resistance and superior pore conformation stability for the Ni-16Cr-xA1 based superalloy foam with 9% A1 can be mainly attributed to the formation of relatively continuous and protective A1203 oxides on the surface of the foam.
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| 关 键 词： | 氧化行为 泡沫材料 高温合金 镍铬铝 空气 高温抗氧化性 复合氧化物 Al含量 |
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