铝合金微弧氧化陶瓷层光泽度性能的研究

Study on Glossiness of Ceramics Prepared by Micro-arc Oxidation on Aluminum Alloy

为了探索工艺参数对铝合金微弧氧化陶瓷层表面光泽度的影响规律,加速微弧氧化产品在光学领域的应用,采用MAO240/750电源设备对6061铝合金试样进行微弧氧化处理和用电导率仪测量溶液的电导率,分别利用WGG60-E4光泽度计量仪和JM6460扫描电子显微镜进行光泽度测量和表面形貌组织观察,研究了电流密度大小、溶液温度和试样尺寸等因素对铝合金微弧氧化陶瓷层光泽度的影响,研究结果表明:在微弧氧化前期阶段,陶瓷层的光泽度随着氧化时间的延长呈指数规律下降,并且电流密度和溶液温度都对陶瓷层的光泽度变化具有重要的影响,电流密度越大和溶液温度越高,光泽度随氧化时间延长而下降的速度越快,到了中后期,它们对光泽度大小无影响,光泽度大小都变为2.5且不随氧化时间而变化;试样尺寸大小对陶瓷层光泽度大小无影响,不同尺寸试样的光泽度随时间的延长按照η=519.8 e-t的指数规律下降。

In order to explore the law by which processing parameters influence glossiness of the ceramic on aluminum made by micro-arc oxidation, and to accelerate the application of products processed by micro-arc oxidation to optics field, using MA0240/750 power supply equipment to micro-arc oxidize samples made from 6061 aluminum alloy and conductivity meter to measure electric conductivity of solution, then Employing WGG60-FA glossiness guage and JSM6460 scanning electron microscope to survey glossiness and surface morphology, this paper deal with influences of current density, solution temperature and sample size on glossiness of ceramic made by micro-arc oxidation. Research resuits indicate that at the early stage of micro-arc oxidation, glossiness of ceramic drops along oxidation time by the law of exponential, and both current density and solution temperature have important influence on the change of glossiness, the greater the current density or the higher the solution temperature, the faster the glossiness declines with oxidation time, but at the mid-and later stage, they don＇ t effect the change of glossiness, all glossiness become 2.5 and don＇ t change with time. during middle and later period, glossiness drops to 2.5 and it doesn＇ t change with time. Sample size have no effect on glossiness, all glossiness of sample with different size decrease with time by η=519.8e^-1 exponential lawo