| 溅射NiCrAlY涂层氧化过程Al2O3膜结构与形貌的转变 |
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| 引用本文： | 李美,孙晓峰,张重远,胡望宇,管恒荣,胡壮麒. 溅射NiCrAlY涂层氧化过程Al2O3膜结构与形貌的转变[J]. 腐蚀科学与防护技术, 2002, 14(3): 142-146 |
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| 作者姓名： | 李美 孙晓峰 张重远 胡望宇 管恒荣 胡壮麒 |
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| 作者单位： | 1. 中国科学院金属研究所,沈阳,110016
2. 湖南大学材料科学与工程学院,长沙,410082 |
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| 摘 要： | 对溅射NiCrAlY涂层进行了900℃，1000℃，1100℃空 气中高温氧化。实验表明，氧化初期生成快速长大的亚稳态θ-Al2O3相，随着氧化时间 延长，θ-Al2O3逐渐转变成α-Al2O3，氧化动力学抛物线常数kp也随之下降 。θ→α-Al2O3相变速度与温度有关，温度越高，相变越快。对涂层进行真空热处理可 促进θ→α-Al2O3转变，使涂层表面快速形成保护性能优异的α-Al2O3。
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| 关 键 词： | 溅射NiCrAlY涂层 高温氧化 |
| 文章编号： | 1002-6495(2002)03-0142-05 |
| 修稿时间： | 2001-05-25 |
PHASE AND MORPHOLOGY TRANSFORMATION OF AI2O3 DURING OXIDATION OF SPUTTERED NiCrAIY COATINGS |
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| LI Meiheng ,SUN Xiaofeng ,ZHANG Zhongyuan ,HU Wangyu ,GUAN Hengrong ,HU Zhuangqi. PHASE AND MORPHOLOGY TRANSFORMATION OF AI2O3 DURING OXIDATION OF SPUTTERED NiCrAIY COATINGS[J]. Corrosion Science and Protection Technology, 2002, 14(3): 142-146 |
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| Authors: | LI Meiheng SUN Xiaofeng ZHANG Zhongyuan HU Wangyu GUAN Hengrong HU Zhuangqi |
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| Affiliation: | LI Meiheng 1,SUN Xiaofeng 1,ZHANG Zhongyuan 1,HU Wangyu 2,GUAN Hengrong 1,HU Zhuangqi 1 |
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| Abstract: | The isothermal oxidation of sputtered NiCrAlY coatin gs was performed in air at 900℃，1000℃ and 1100℃.Transient alumina θ-Al2O 3,with fast growing rate,was formed on the surface of the coatings in the init ial stage of oxidation.With oxidation time increasing,θ-Al2O3 transformed i nto α-Al2O3,and hence the parabolic rate constant decreased.The higher the temperature,the faster the transformation of θ-Al2O3 into α-Al2O3.A pr e-heat treatment of the sputtered NiCrAlY coatings in vacuum can accelerate the transformation of θ-Al2O3 into α-Al2O3，and there with the protective α-Al2O3 scale is formed more rapidly on the surface of the coatings. |
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| Keywords: | sputtered NiCrAlY coating high temperature oxidation phase transformation vacuum heat treatment |
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