| Al_2O_3含量对等离子喷涂TiO_2-Al_2O_3陶瓷涂层组织性能的影响 |
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| 引用本文： | 马然,贺定勇,蒋建敏.Al_2O_3含量对等离子喷涂TiO_2-Al_2O_3陶瓷涂层组织性能的影响[J].中国表面工程,2010,23(2):60-63. |
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| 作者姓名： | 马然 贺定勇 蒋建敏 |
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| 作者单位： | 北京工业大学,材料科学与工程学院,北京,100124 |
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| 摘 要： | 采用大气等离子喷涂方法制备TiO2–Al2O3陶瓷涂层,利用SEM和XRD分析了涂层的显微组织和相结构,并研究了涂层的电阻率随温度变化的规律。研究结果表明:TiO2–Al2O3陶瓷涂层主要由金红石型TiO2、锐钛矿型TiO2、Magneli相、α–Al2O3及γ–Al2O3组成。涂层的显微硬度和电阻率随Al2O3含量的增加而增加,在通电升温条件下涂层的电阻率随温度升高而降低。
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| 关 键 词： | 二氧化钛涂层 氧化铝 等离子喷涂 电阻率 |
Influence of Al2O3 Content on the Microstructure and Properties of TiO2-Al2O3 Ceramic Coatings by Plasma Spraying |
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| Affiliation: | College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 |
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| Abstract: | TiO_2-Al_2O_3 ceramic coatings were produced by air plasma spraying system. The microstructure and phase composition of the coatings were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrical resistivity of the coatings was measured by electrifying heating device. The results show that the TiO_2-Al_2O_3 ceramic coatings are mainly composed of rutile, anatase, magneli, α-Al_2O_3 and γ-Al_2O_3. The mircohardness and electrical resistivity of the coatings increase with the increase of alumina content in the coatings. The electrical resistivity of the coatings decreases with the increase of heating temperature. |
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| Keywords: | TiO_2 coating Alumina plasma spraying electrical resistivity |
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