-1Al(NO3)3.9H2O的乙醇溶液為電解液,用陰極微弧電沉積的方法在貧鈾表面制備出厚度約為65μm的氧化鋁陶瓷涂層,通過掃描電子顯微鏡(SEM)觀察了涂層的表面和截面形貌,通過X射線衍射儀(XRD)及X射線能量色散譜(EDS)分析了涂層的成分以及相組成,通過電化學(xué)綜合測試系統(tǒng)分析了涂層的電化學(xué)腐蝕性能,結(jié)果表明：涂層表面粗糙多孔,與基體呈犬牙咬合狀結(jié)合；涂層主要由α-Al2O3和γ- Al2O3組成；涂層中含有少量的U元素,表明膜/基界面附近的貧鈾基體在微弧放電的作用下也參與了成膜；沉積氧化鋁涂層后,樣品的腐蝕電流密度降低了2個數(shù)量級,耐腐蝕性能得到大幅度提高。"/>

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貧鈾表面陰極微弧電沉積氧化鋁涂層的研究
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表面物理與化學(xué)重點(diǎn)實驗室,表面物理與化學(xué)重點(diǎn)實驗室,中國工程物理研究院,表面物理與化學(xué)重點(diǎn)實驗室,表面物理與化學(xué)重點(diǎn)實驗室

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Study of Alumina Coating Deposited on Depleted Uranium Surface by Cathodic Microarc Method
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Science and Technology on Surface Physics and Chemistry Laboratory,Science and Technology on Surface Physics and Chemistry Laboratory,China Academy of Engineering Physics,Science and Technology on Surface Physics and Chemistry Laboratory,Science and Technology on Surface Physics and Chemistry Laboratory

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    以1.0mol.L-1Al(NO3)3.9H2O的乙醇溶液為電解液,用陰極微弧電沉積的方法在貧鈾表面制備出厚度約為65μm的氧化鋁陶瓷涂層,通過掃描電子顯微鏡(SEM)觀察了涂層的表面和截面形貌,通過X射線衍射儀(XRD)及X射線能量色散譜(EDS)分析了涂層的成分以及相組成,通過電化學(xué)綜合測試系統(tǒng)分析了涂層的電化學(xué)腐蝕性能,結(jié)果表明：涂層表面粗糙多孔,與基體呈犬牙咬合狀結(jié)合；涂層主要由α-Al2O3和γ- Al2O3組成；涂層中含有少量的U元素,表明膜/基界面附近的貧鈾基體在微弧放電的作用下也參與了成膜；沉積氧化鋁涂層后,樣品的腐蝕電流密度降低了2個數(shù)量級,耐腐蝕性能得到大幅度提高。

    Abstract:

    An alumina coating with a thickness of 65μm was prepared on depleted uranium surface by cathodic microarc desposition in 1mol/L Al(NO3)3.9H2O ethanol solution. The morphology, composition and phase constituent of alumina coating were analyzed by SEM, XRDand EDS. The corrosion resistance were determined by electrochemical integrated test system. The results show that the coating, which is composed of α-Al2O3and γ- Al2O3, remain a good adhesion to depleted uranium substrate. The coating contains a little uranium element, which confirms that depleted uranium substrate near the coating /uranium also takes part in the sintering process of coating under cathodic microarc discharge. The coating reduce the depleted corrosion current by two orders-of-magnitude, which shows the good corrosion resistance.

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王佳佳,帥茂兵,何偉波,莫川,蔣春麗.貧鈾表面陰極微弧電沉積氧化鋁涂層的研究[J].稀有金屬材料與工程,2017,46(6):1727~1730.[Wang Jiajia, Shuai Maobing, He Weibo, Mo Chuan, Jiang Chunli. Study of Alumina Coating Deposited on Depleted Uranium Surface by Cathodic Microarc Method[J]. Rare Metal Materials and Engineering,2017,46(6):1727~1730.]
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  • 收稿日期:2015-02-12
  • 最后修改日期:2015-04-15
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-11-07
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