PDF(Pubmed)
Abstract：
Aluminum alloys have been widely studied because of their current engineering applications. Due to their high strength and lightweight, cracking can easily initiate on their surface, deteriorating their overall functional and structural properties and causing environmental attacks. The current study highlights the significant influence of incorporating 1 wt% silica nanostructure in aluminum-10 zinc alloys. The characteristics of the composites were examined using Vickers hardness, tensile, and electrochemical testing (OCP, Tafel, and EIS) at various artificial aging temperatures (423, 443, and 463 K). Silica nanorods may achieve ultrafine grains, increase hardness by up to 13.8%, increase σUTS values by up to 79% at 443 K, and improve corrosion rate by up to 89.4%, surpassing Al-10 Zn bulk metallics. We demonstrate that silica nanorods contribute to the creation of a superior nanocomposite that not only limits failure events under loading but also resists corrosion. Our findings suggest that silica nanocomposite can produce unique features for use in a variety of automotive, construction, and aerospace applications. This improvement can be attributed mainly to the large surface area of nano-silica particles, which alters the Al matrix. Microstructural, mechanical, and electrochemical studies revealed that the effects of structure refinement were dependent on nano-silica.
摘要：
铝合金由于其当前的工程应用而被广泛研究。由于其高强度和轻质，裂纹很容易在它们的表面引发，它们的整体功能和结构特性恶化，造成环境攻击。当前的研究强调了在铝-10锌合金中掺入1wt％二氧化硅纳米结构的显着影响。使用维氏硬度检查复合材料的特性，拉伸,和电化学测试(OCP，塔菲尔,和EIS）在各种人工老化温度（423、443和463K）下。二氧化硅纳米棒可以实现超细晶粒，硬度增加高达13.8%，在443K时将σUTS值增加高达79%，并将腐蚀率提高高达89.4%，超越Al-10Zn散装金属。我们证明，二氧化硅纳米棒有助于产生优异的纳米复合材料，不仅限制了负载下的失效事件，而且还耐腐蚀。我们的研究结果表明，二氧化硅纳米复合材料可以产生独特的功能，用于各种汽车，建筑,和航空航天应用。这种改进主要归因于纳米二氧化硅颗粒的大表面积，这改变了Al矩阵。微观结构,机械,电化学研究表明，结构细化的影响取决于纳米二氧化硅。
