一种新型细晶Ni3A1涂层抗高温氧化性能研究
Oxidation of a Novel Fine-grained Ni_3Al Coating
查看参考文献16篇
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文摘
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通过600℃/2 h真空退火, 使复合电沉积的Ni-14.1 mass％Al膜(平均粒径为1μm)合金化, 获得一种新型细晶Ni_3Al涂层.对比研究了该涂层与粗晶Ni_3A1l合金900℃下50 h恒温氧化过程.结果表明, 细晶涂层可快速生长连续Al_20_3膜, 导致Ni0的生长受到明显抑制.与粗晶合金相比, 该氧化膜粘附性更强.其原因可能在于氧化时细晶结构可抑制源自氧化膜的阳离子空位及Ni_3Al中因Al、Ni的互扩散所致的"Kirkendall"空位在氧化膜/基体界面沉积形成孔洞, 提高了二者的结合强度 |
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其他语种文摘
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A novel fine-grained Ni_3Al coating was fabricated by annealing an electrodeposited Ni-14.1 mass%Al composite coating in vacuum at 600 ~C for 2 h. Oxidation of the coating was compared to that of a coarse-grained Ni3A1 alloy at 900 ~C for 50 h and the result showed that the growth of NiO was significantly retarded on the coating because of a rapid formation of a continuous alumina scale. Moreover, the alumina scale on the coating was much adherent, because the existence of abundant grain boundaries in the coating inhibited the formation of cavities at the scale/metal interface due to condensation of cation vacancies injected from the growing scale and "Kirkendall" vacancies generated below scale because of the inter-diffusion between Al and Ni during oxidation |
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来源
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腐蚀科学与防护技术
,2011,23(1):1-4 【核心库】
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关键词
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氧化
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细晶
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Ni_3Al
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退火
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孔洞
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地址
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1.
哈尔滨工程大学材料科学与化学工程学院, 哈尔滨, 150001
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中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 沈阳, 110016
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哈尔滨工程大学材料科学与化学工程学院, 金属腐蚀与防护国家重点实验室, 哈尔滨, 150001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1002-6495 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:4122702
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