吹气法泡沫铝泡壁表面氧化膜氧化动力学（英文）

发布时间：2018-05-26 11:34

本文选题：泡沫铝 + 吹气法　；参考：《Transactions of Nonferrous Metals Society of China》2015年08期

【摘要】：在620~710°C范围内,将压缩空气吹入含有陶瓷颗粒的A356铝合金熔体中制备泡沫铝样品。运用AES技术对泡壁表面进行分析,以研究温度对表面氧化膜厚度的影响。根据金属腐蚀学及流体力学原理建立表面氧化膜泡壁氧化动力学模型。从理论上预测不同温度条件下泡沫铝泡壁表面氧化膜的厚度,并与实验值进行对比。结果表明,在620~710°C范围内,考虑上浮过程的模型预测的氧化膜厚度理论值明显高于实验值,而不包含上浮过程的模型预测的理论值与实验值符合较好,且后者能更好地描述泡沫铝泡壁表面氧化膜的氧化过程。研究表明,吹气法泡沫铝泡壁表面氧化膜的氧化速率与温度之间的关系符合Arrhenius公式。
[Abstract]:In the range of 620 ~ 710 掳C, compressed air was blown into the melt of A356 aluminum alloy containing ceramic particles to prepare aluminum foam samples. The effect of temperature on the thickness of the surface oxide film was studied by AES technique. According to the principles of metal corrosion and hydrodynamics, the oxidation kinetics model of surface oxide film was established. The thickness of oxide film on the surface of aluminum foams at different temperatures was predicted theoretically and compared with the experimental values. The results show that in the range of 620 ~ 710 掳C, the theoretical value of oxide film thickness predicted by the model considering the floating process is obviously higher than the experimental value, but the theoretical value of the model without the floating process is in good agreement with the experimental value. The latter can better describe the oxidation process of the oxide film on the foam aluminum foam wall. The results show that the relationship between the oxidation rate and the temperature of the oxidation film on the aluminum foam wall by blowing method accords with the Arrhenius formula.
【作者单位】：清华大学材料学院;清华大学先进成型制造教育部重点实验室;
【基金】：Project(51371104)supported by the National Nature Science Foundation of China
【分类号】：TG174.4

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