Li Wen, Cheng Ming, Zhang Xiaochen, Wei Guoke
Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering, AVIC Manufacturing Technology Institute, Beijing 100024, China.
Science and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, China.
Heliyon. 2024 Sep 28;10(19):e38719. doi: 10.1016/j.heliyon.2024.e38719. eCollection 2024 Oct 15.
The 2A12 aluminum alloy, renowned for its exceptional mechanical properties, encounters significant limitations in applications involving abrasive environments or frequent contact with other surfaces due to its inadequate wear resistance. This shortcoming substantially reduces the service life of components and escalate maintenance costs, highlighting the urgent need for advanced surface modification techniques. This study meticulously investigates the influence of nanoceramic particle size and content on the wear resistance of micro-arc oxidation (MAO) coatings, a surface modification technique renowned for forming dense, adherent ceramic layers on aluminum alloys. The systematic experimentation revealed that the incorporation of 150 nm α-AlO nanoparticles into the MAO matrix achieves an optimal dispersion, leading to a substantial enhancement in wear resistance. The sample with a 5 g/L concentration of 150 nm α-AlO nanoparticles doping in the MAO electrolyte demonstrated the lowest mass loss, underscoring its enhanced wear resistance. The enhanced microstructure, enriched with hard ceramic phases such as α-AlO and mullite, plays a pivotal role in withstanding wear. Moreover, this study identified that an optimal balance of surface roughness and coating thickness is essential for achieving enhanced wear resistance. The findings of this research provide a strategy for the design of wear-resistant coatings tailored for high-performance applications across aerospace, automotive, and general engineering industries. By optimizing the particle size and concentration in MAO coatings, this study paves the way for the development of durable materials capable of thriving in demanding environments, thereby extending the service life and reducing maintenance requirements of components.
2A12铝合金以其卓越的机械性能而闻名，但由于其耐磨性不足，在涉及磨蚀环境或频繁与其他表面接触的应用中存在显著局限性。这一缺点大幅降低了部件的使用寿命并增加了维护成本，凸显了对先进表面改性技术的迫切需求。本研究精心调查了纳米陶瓷颗粒尺寸和含量对微弧氧化（MAO）涂层耐磨性的影响，微弧氧化是一种在铝合金上形成致密、附着性好的陶瓷层的表面改性技术。系统实验表明，将150纳米的α-AlO纳米颗粒掺入MAO基体中可实现最佳分散，从而大幅提高耐磨性。在MAO电解液中掺杂浓度为5克/升的150纳米α-AlO纳米颗粒的样品表现出最低的质量损失，突出了其增强的耐磨性。富含α-AlO和莫来石等硬陶瓷相的增强微观结构在抵抗磨损方面起着关键作用。此外，本研究确定表面粗糙度和涂层厚度的最佳平衡对于实现增强的耐磨性至关重要。本研究结果为设计适用于航空航天、汽车和一般工程行业高性能应用的耐磨涂层提供了一种策略。通过优化MAO涂层中的颗粒尺寸和浓度，本研究为开发能够在苛刻环境中蓬勃发展的耐用材料铺平了道路，从而延长了部件的使用寿命并降低了维护要求。
