M. Kaseem, Ananda Repycha Safira, A. Fattah‐alhosseini
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引用次数: 0
摘要
本研究采用甜菊糖作为新型添加剂,研究如何通过微弧氧化(MAO)提高 Ti-6Al-4V 合金上基于 TiO2 的涂层的表面性能。通过将甜菊糖加入 MAO 处理中使用的醋酸盐-甘油磷酸盐-四乙氧基硅烷溶液中,调节了基于 TiO2 的氧化层的多孔形态。甜菊糖的加入可以缓和等离子放电强度,促进形成均匀的富硅结构,其特点是孔隙率和孔径减小。这种效果归因于甜叶菊和正硅酸四乙酯(TEOS)之间的相互作用,它改变了 TEOS 的水解过程,从而提高了结构的均匀性和稳定性,同时降低了等离子放电强度。此外,理论计算还为了解甜叶菊、TEOS 及其复合物在 MAO 过程中的反应性和相互作用提供了宝贵的资料,为在这一前景广阔的领域开展进一步的研究和优化奠定了基础。
Enhanced Surface Properties of TiO2-Based Coatings via Stevia-Assisted Spark Suppression: Insights from Density Functional Theory Calculations
This study investigates the enhancement of surface properties in TiO2-based coatings on the Ti-6Al-4V alloy through micro-arc oxidation (MAO), employing stevia sugar as a novel additive. By incorporating stevia sugar into acetate–glycerophosphate–tetraethoxysilane solutions used in MAO treatment, the porous morphology of TiO2-based oxide layers is regulated. The incorporation of stevia moderates plasma discharge intensity, facilitating the formation of a uniform silicon-rich structure characterized by reduced porosity and pore size. This effect is attributed to the interaction between stevia and tetraethyl orthosilicate (TEOS), which modifies the TEOS hydrolysis process, thereby enhancing structural uniformity and stability while concurrently reducing plasma discharge intensity. Additionally, theoretical calculations offer a valuable understanding of the reactivity and interactions of stevia, TEOS, and their complex during the MAO process, laying the groundwork for further research and optimization in this promising field.