Al-Mn合金在航空航天、国防军事等工程领域服役过程中，摩擦磨损问题严重影响其使用效率与可靠性。为此，本项目采用同步化学刻蚀技术，提出依靠基体中第二相协助增强超疏水结构以提升摩擦学性能的新思想：利用合金选择性刻蚀特性，制备“第二相原位钉扎”微纳结构，克服常规刻蚀表面强度不足的弱点，进而实现摩擦学性能改善的目标。本项目将在第二相特征、位错组态和刻蚀参数对刻蚀表面物理形态的影响机制与钉扎结构可控制备、以实验检测结合多尺度数值模拟的方法探索多孔结构和理化特性对疏水性能的作用规律、第二相特征/位错组态/刻蚀参数-微纳结构/官能团类型-摩擦学性能关联理论模型三个方面探索基础理论，建立兼有减摩润滑层和抗磨承载相的超疏水表面制备技术。通过该项目研究，进一步丰富和发展超疏水表面摩擦学机理，为构筑新型减摩抗磨超疏水表面提供必要的理论支撑和实践指导，对推动我国微纳条件下摩擦学领域发展具有重要意义。

During the service process of Al-Mn alloy in aerospace, national defense and military affairs as well as other engineering fields, the problem of friction and wear seriously affects its service efficiency and reliability. For this reason, this project adopts synchronous chemical etching technology, and puts forward a new idea of relying on the second phase in the matrix to assist in strengthening the superhydrophobic structure to improve the tribological performance: making use of the selective etching characteristics of the alloy, preparing the "second phase in situ pinning" micro nano structure, overcoming the weakness of insufficient surface strength of conventional etching, so as to achieve the goal of improving the tribological performance. In this project, the basic theory is explored in three aspects. The influence mechanism of the second phase characteristics, dislocation configuration and etching parameters on the physical morphology of the etched surface and the controllable preparation of the pinned structure will be investigated. The law of the effect of porous structure and physicochemical property on the hydrophobic properties will be explored via the method of experimental detection combined with multi-scale numerical simulation, and the correlation theory model of the second phase characteristics/dislocation configuration/etching parameters-micro nano structure/functional group type-tribology performance will be studied. Thus, the superhydrophobic surface preparation technology with antifriction lubrication layer and anti-wear bearing phase is established. Through the research of this project, the tribological mechanism of superhydrophobic surface will be further enriched and developed. Necessary theoretical support and practical guidance for the construction of new friction reducing and anti-wear superhydrophobic surface will be also provided. It is of great significance to promote the development of tribology field under micro-nano conditions in China.