【摘要】：選取不同的電源頻率,用微弧氧化方法在AZ91D鎂合金表面制備一系列陶瓷層,并分別采用掃描電子顯微鏡、電化學(xué)工作站和MS-T3000摩擦磨損試驗(yàn)儀對(duì)陶瓷層的形貌、厚度、耐腐蝕性和耐磨性能進(jìn)行系統(tǒng)研究。結(jié)果表明,隨著電源頻率的增大,生成的陶瓷層變致密,厚度變薄。隨著電流頻率的增加,陶瓷層的耐腐蝕性明顯提高,與陶瓷層的厚度的影響相似,不同電流頻率下得到的陶瓷層的腐蝕電流的差值均變小。陶瓷層的摩擦因數(shù)隨著電流頻率的增大而減小,其耐磨性能由膜層厚度及其結(jié)構(gòu)致密性共同決定。通過(guò)微弧氧化陶瓷層的生長(zhǎng)機(jī)理對(duì)得到的結(jié)果進(jìn)行分析。
[Abstract]:A series of ceramic layers were prepared on the surface of AZ91D magnesium alloy by micro-arc oxidation at different power supply frequencies. The morphology and thickness of the ceramic layer were measured by scanning electron microscope, electrochemical workstation and MS-T3000 friction and wear tester, respectively. Corrosion resistance and wear resistance were systematically studied. The results show that with the increase of power supply frequency, the ceramic layer becomes compact and the thickness becomes thinner. With the increase of current frequency, the corrosion resistance of ceramic layer increases obviously, which is similar to the influence of the thickness of ceramic layer, and the difference of corrosion current of ceramic layer obtained at different current frequencies becomes smaller. The friction coefficient of ceramic layer decreases with the increase of current frequency, and its wear resistance is determined by the thickness of the film and the tightness of its structure. The results were analyzed by the growth mechanism of micro-arc oxidation ceramic layer.
【作者單位】： 中央民族大學(xué)理學(xué)院;中國(guó)科學(xué)院物理研究所;
【基金】：Project(11005151)supported by the Young Scientists Fund of the National Natural Science Foundation of China Project(YETP1297)supported by the Beijing Higher Education Young Elite Teacher Project,China Project(BEIJ2014110003)supported by the Undergraduate Research and Innovative Undertaking Program of Beijing,China
【分類(lèi)號(hào)】：TG178

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本文編號(hào)：2495906