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恒壓模式下電源頻率對(duì)ZrH1.8表面微弧氧化陶瓷層的影響
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國(guó)家自然科學(xué)基金 (51164023)；內(nèi)蒙古自治區(qū)高等學(xué)校青年科技英才支持計(jì)劃 (NJYT-13-B10)


Effect of Frequency on MAO Film on the Surface of ZrH1.8 under Constant-Voltage Mode
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    摘要:

    在磷酸鹽體系下，采用恒壓模式對(duì)氫化鋯(ZrH1.8)進(jìn)行微弧氧化。考察了電源頻率對(duì)氧化膜的厚度、相結(jié)構(gòu)、截面形貌以及阻氫性能的影響。利用掃描電鏡(SEM)、X射線衍射(XRD)、膜層測(cè)厚儀分析了氧化膜的表面形貌、截面形貌、相結(jié)構(gòu)及膜層厚度。通過(guò)真空脫氫實(shí)驗(yàn)評(píng)估膜層的阻氫性能。結(jié)果表明：隨著電源頻率的增加，ZrH1.8表面微弧氧化膜層厚度由約50 μm僅減小至約45 μm；電源頻率的增加能有效提高膜層的致密性；電源頻率的改變對(duì)于膜層的相結(jié)構(gòu)沒(méi)有明顯影響，膜層主要由單斜相氧化鋯(M-ZrO2)和四方相氧化鋯(T-ZrO1.88)構(gòu)成，其中單斜相占80%以上；電源頻率的增加有助于提高氧化膜的阻氫效果，當(dāng)電源頻率增加到300 Hz時(shí)，氧化膜的氫滲透降低因子PRF值高達(dá)10.8。

    Abstract:

    Micro-arc oxidation (MAO) process was conducted on ZrH1.8 in an electrolyte composed of Na5P3O10 under the constant voltage mode. The influence of frequency on thickness, phase structure, cross-section morphology and the hydrogen resistance performance of coatings were investigated. The surface and cross-sectional morphologies, phase structure of the coatings and film thickness were characterized by scanning election microscopy (SEM) and X-ray diffraction (XRD). Hydrogen resistance performance was evaluated by vacuum dehydrogenation. The results show that the thickness of coatings on ZrH1.8 decreases from about 50 mm to 45 μm with the increase of frequency. The increase of frequency can enhance the density of coating effectively. Besides, the change of frequency has no obvious influence on the coating phase structure, and the coating is mainly composed of M-ZrO2 and T-ZrO1.88, and the amount of M-ZrO2 accounts for more than 80%. The increase of frequency can improve the hydrogen resistance of the ceramic coating, and the PRF (permeation reduction factor) value reaches up to 10.8 when the frequency increases to 300 Hz.

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王志剛,陳偉東,閆淑芳,范秀娟.恒壓模式下電源頻率對(duì)ZrH1.8表面微弧氧化陶瓷層的影響[J].稀有金屬材料與工程,2015,44(1):184~188.[Wang Zhigang, Chen Weidong, Yan Shufang, Fan Xiujuan. Effect of Frequency on MAO Film on the Surface of ZrH1.8 under Constant-Voltage Mode[J]. Rare Metal Materials and Engineering,2015,44(1):184~188.]
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  • 收稿日期:2014-01-28
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  • 在線發(fā)布日期: 2015-05-22
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