| 金属钼表面MoSi2/Si3N4涂层的氧化性能研究 |
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| 引用本文： | 古思勇,张厚安,谢能平. 金属钼表面MoSi2/Si3N4涂层的氧化性能研究[J]. 厦门理工学院学报, 2011, 19(2): 18-21 |
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| 作者姓名： | 古思勇 张厚安 谢能平 |
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| 作者单位： | 1. 厦门理工学院材料制备与应用技术研究所,福建厦门,361024
2. 湖南科技大学机电工程学院,湖南湘潭,411201 |
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| 基金项目： | 福建省教育厅B类科技项目(JB10145)；厦门市科技计划高校创新项目 |
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| 摘 要： | 在金属钼表面分别制备了MoSi2涂层和MoSi2/Si3N4涂层,利用SEM和XRD分析研究了涂层的微观结构和物相组成,并比较了涂层在1 450℃大气环境下的抗氧化性能.结果表明:两种涂层与基体结合好且均匀致密;MoSi2涂层钼氧化16 h后出现贯穿裂纹,破坏了SiO2保护膜的连续性,导致涂层失效;Si3N4相的引入可明显改善MoSi2基涂层钼的高温抗氧化性,其抗氧化时间达76 h.
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| 关 键 词： | MoSi2/Si3N4涂层 金属钼 高温氧化性能 |
Oxidation Property of MoSi2/Si3N4 Coating on Mo Substrate |
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| GU Si-yong,ZHANG Hou-an,XIE Neng-ping. Oxidation Property of MoSi2/Si3N4 Coating on Mo Substrate[J]. Journal of Xiamen University of Technology, 2011, 19(2): 18-21 |
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| Authors: | GU Si-yong ZHANG Hou-an XIE Neng-ping |
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| Affiliation: | 1.Iinstitute of Material Preparation and Applied Technology,Xiamen University of Technology,Xiamen 361024,China; 2.College of Electromechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China) |
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| Abstract: | MoSi2 and MoSi2/Si3N4 coatings were fabricated on Mo substrate respectively.Their oxidation property was measured at 1 450 ℃ in air.Microstructures and phase composition of the coatings were analyzed by SEM and XRD.Results show that MoSi2 and MoSi2/Si3N4 coatings are homogeneous and compact,and have a good bond with the substrate.The crack destroying the continuous SiO2 film is the main reason of the MoSi2 coating failure after 16 hours at 1 450 ℃.However,the addition of Si3N4 can improve the high temperature oxidation resistance of MoSi2 coating,and the oxidation life of MoSi2/Si3N4 coating at 1 450 ℃ is prolonged to 76 hours. |
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| Keywords: | MoSi2/Si3N4 coating Mo substrate High-temperature oxidation resistance |
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