| 盐雾腐蚀对Al-Si涂层循环氧化行为的影响 |
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| 引用本文： | 宋复斌,张琦.盐雾腐蚀对Al-Si涂层循环氧化行为的影响[J].腐蚀科学与防护技术,2003,15(2):75-78. |
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| 作者姓名： | 宋复斌 张琦 |
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| 作者单位： | 北京航空航天大学,材料科学与工程学院,北京,100083 |
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| 基金项目： | 航空基础科学基金资助项目 (0 1I 5 10 0 6) |
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| 摘 要： | 研究了盐雾腐蚀对Ni基高温合金Al-Si防护涂层循环
氧化行为的影响.结果表明，涂层在盐雾腐蚀后，表面Al2O3膜受到破坏，出现大量的腐蚀坑，且蚀坑区域Al含量明显下降.在循环氧化过程中，腐蚀坑内重新生成的Al2O3膜粗糙且易剥落，蚀坑区域出现γ'-Ni3Al相的时间明显提前，从而降低了涂层的耐循环氧化能力，缩短了涂层的寿命.
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| 关 键 词： | Al-Si涂层 盐雾腐蚀 循环氧化 |
| 文章编号： | 1002-6495(2003)02-0075-04 |
| 修稿时间： | 2002年1月8日 |
INFLUENCE OF PRE-SPRAY-TEST ON CYCLIC OXIDATION BEHAVIOR OF Al-Si COATING |
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| SONG Fubin,ZHANG QiBeijing University of Aeronautics and Astronautics,School of Materials Science and Engineering.INFLUENCE OF PRE-SPRAY-TEST ON CYCLIC OXIDATION BEHAVIOR OF Al-Si COATING[J].Corrosion Science and Protection Technology,2003,15(2):75-78. |
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| Authors: | SONG Fubin ZHANG QiBeijing University of Aeronautics and Astronautics School of Materials Science and Engineering |
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| Abstract: | The Al-Si coating on Ni-base superalloy DZ125
by a salt-spray-test for certain peried.Then the influence of the pre-spray-test on cyclic oxidation behavior of the coating was furthe evaluated.Pits were formed on the surface of the Al-Si coating due to the salt-spray-test.The formation ofγ'-Ni3Al phase at and adjacent to the pits was stimulated owing to the depletion of Al there.The Al2O3 films formed within the pit were rough,which induced the congregation of stresses and therefore increased spallation of the oxide film during the cyclic oxidation.Thus,the oxidation resistance and the lifetime of the coating were obviously reduced by the salt-spray-test. |
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| Keywords: | Al-Si coatings salt-spray-test cyclic oxidation |
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