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首页> 外文会议>International Conference on Surface Modification Technologies >The Effect of Electrolyte and Process Parameters on the Growth Rate and Mechanical Properties of Mullite-rich Plasma Electrolytic Oxide Coatings
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The Effect of Electrolyte and Process Parameters on the Growth Rate and Mechanical Properties of Mullite-rich Plasma Electrolytic Oxide Coatings

机译：电解质和工艺参数对富含富含氯化物血浆电解氧化物涂料的生长速率和力学性能的影响

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摘要

Plasma electrolytic oxide (PEO) coatings have been produced on 6082 aluminium alloy substrates under various conditions (using two different electrolytes which are described as electrolyte A and B, processing time, current density) and their effects on the growth rate and mechanical properties have been studied. The final coating thickness on aluminum substrate depends predominantly on the processing time and the applied current density. On the other hand, nanoindentation test results showed that the hardness (in electrolyte A coating is about 11.5 GPa, while the average measured hardness of coatings in electrolyte B decrease to 8.5 GPa.) and the Young's modulus decrease with an increase of the concentration of silicate and remain unaffected by the current density. These variations in mechanical properties are explained by the amount of porosity (in electrolyte A coating has about 10% and in electrolyte B coating has about 8%) within the coating and the elemental composition of the microstructure. Indeed, the microstructures of the coatings and the silicate concentration in the electrolyte have been established and a variation in the composition profile through the thickness of the coating is observed using SEM and FEGSEM by EDX module. Finally, X-ray 'powder' diffraction (XRD) technique has been performed to identify the phases present and their relative proportions.
机译：等离子体电解氧化（PEO）涂层已经在各种条件下6082个铝合金基材（使用两种不同的电解质，其被描述为电解质A和B，处理时间，电流密度）及其对生长速率的影响和机械性能产生的已研究。铝基材上的最终涂层的厚度主要取决于处理时间和所施加的电流密度。在另一方面，纳米压痕测试结果表明，硬度（以电解质的涂层为约11.5 GPA，而在电解液B减小涂层的平均测量硬度至8.5 GPA）和杨氏模量降低的增加的浓度的硅酸盐和由电流密度不受影响。在机械性能，这些变化是由孔隙量解释（在电解质的涂层具有约10％和在电解液B涂层具有约8％）的涂层和显微组织的元素组成范围内。实际上，涂层在电解质中的微结构和硅酸盐浓度已经建立，并且使用SEM和FEGSEM通过EDX模块被观察到通过所述涂层的厚度在组成分布的变化。最后，X射线“粉末”衍射（XRD）技术已经被执行以识别相存在，并且它们的相对比例。

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