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首页> 外文期刊>Applied Surface Science >Improvement in the corrosion resistance of Al_(18)B_4O_(33)w/2024Al composite by laser surface treatment
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Improvement in the corrosion resistance of Al_(18)B_4O_(33)w/2024Al composite by laser surface treatment

机译：通过激光表面处理提高Al_（18）B_4O_（33）w / 2024Al复合材料的耐蚀性

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Aluminum metal-matrix composites (MMCs) show great potential for aircraft industries. Nevertheless, the composites can be affected by different forms of corrosion such as pitting and galvanic corrosion. A pulsed YAG laser installation was used to produce surface treatment on Al_(18)B_4O_(33)w/2024Al composite. Results indicate that laser power has significant influences on both of the microstructure and the corrosion resistance. The difference in morphological transformations was observed on the surfaces of the laser-treated specimens. An increase in E_(pit) was obtained after laser treatment for the composite. The improvement was considered primarily due to the reduction both of reinforcement Al_(18)B_4O_(33) whisker and intermetallics CuAl_2 on the surfaces of the laser-treated composites, which were found to be sites for pits nucleation. Moreover, the specimen with 700 W laser treatment exhibited a much greater resistance to corrosion than the other specimens with laser treatment. This was attributed to the formation of the homogeneous and defect free microstructure in the laser-modified layer.
机译：铝金属基复合材料（MMC）在飞机工业中显示出巨大的潜力。然而，复合材料会受到不同形式的腐蚀的影响，例如点蚀和电化腐蚀。使用脉冲YAG激光设备对Al_（18）B_4O_（33）w / 2024Al复合材料进行表面处理。结果表明，激光功率对显微组织和耐蚀性都有重要影响。在经激光处理的样品表面上观察到形态转变的差异。对复合材料进行激光处理后，E_（pit）增大。认为该改进主要是由于减少了激光复合材料表面的增强Al_（18）B_4O_（33）晶须和金属间化合物CuAl_2，它们被发现是凹坑形核的位置。此外，经过700 W激光处理的样品比其他经过激光处理的样品具有更大的耐腐蚀性。这归因于在激光改性层中形成均匀且无缺陷的微观结构。

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