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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Surface Roughness of an Electropolished Aluminum Substrate on the Thickness, Morphology, and Hardness of Aluminum Oxide Coatings Formed During Anodization in Oxalic Acid
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Effect of Surface Roughness of an Electropolished Aluminum Substrate on the Thickness, Morphology, and Hardness of Aluminum Oxide Coatings Formed During Anodization in Oxalic Acid

机译：电抛光铝基板对氧化铝涂层厚度，形貌和氧化铝氧化铝涂层的硬度的影响

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摘要

Aluminum specimens were electropolished to five different roughness profiles and anodized in 10% oxalic acid under identical conditions in order to study the effect of surface topography on the thickness, morphology, chemical composition and hardness of the anodic aluminum oxide coatings formed. Field emission scanning electron microscopy showed that the anodic coating grown on a substrate having an average roughness of 250 nm was dense, whereas the microstructure became more porous with increasing the substrate roughness. The thickness of the coating was found to be a parabolic function of substrate roughness. Energy-dispersive x-ray analysis of coatings revealed a continuous increase in O/Al ratio with increasing substrate roughness suggesting increased incorporation of anions during oxide growth and also a tendency toward the formation of stoichiometric Al2O3. Coatings with higher O/Al ratio displayed improved hardness values.
机译：铝样品在相同的条件下在相同的条件下在10％的草酸中电氢化至五种不同的粗糙度曲线，并在相同的条件下阳极氧化，以研究形成的阳极氧化铝涂层的厚度，形态，化学成分和硬度的表面形貌。 场发射扫描电子显微镜表明，在平均粗糙度为250nm的基材上生长的阳极涂层是致密的，而随着增加的基板粗糙度，微结构变得更加多孔。 发现涂层的厚度是衬底粗糙度的抛物函数。 涂层的能量分散X射线分析表明，随着血管粗糙度的增加，o / al比的连续增加，表明在氧化物生长期间增加阴离子并趋于形成化学计量Al2O3的趋势。 具有较高O / Al比率的涂层显示出改善的硬度值。

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