自适应复合薄膜微纳结构与选择性转移行为的关联研究

Investigation on selective-transferring behavior is an important issue in the study of self-adaptive mechanisms for multi-composite films. However, its effects remain unclear, particular as the requirements on film load-capacity are continuously increasing and the working conditions become more mixed and variable. Focusing on the tribological performance and environmental responseability of transition-metal dichalcogenide/diamond-like carbon (TMD/DLC) based and C/N co-doped composite films sliding in diverse and alternate atmospheres, the nature of correlations between film nanostructure and selective-transferring behavior will be clarified. By revealing the inherent relationship among film nanostructure, selective-transferring behavior and sliding counterface properties, a nanostructure-induced strengthening mechanism of selective transferring behavior will be proposed, based on which an optimization and controllable fabrication of contact surfaces with high strength and low friction can be achieved. The outputs of the project will guide the design and fabrication of composite films with superior self-adaptivity under alternate and rigorous working conditions.

选择性转移行为是复合薄膜自适应机理研究中的一项重要内容，在承载要求不断提高、服役环境愈加复杂、多变等严苛因素作用下，其作用机理尚未阐明。本项目以过渡金属二硫化物/类金刚石碳（TMD/DLC）二元复合体系为基础发展C/N共掺杂多元复合薄膜，通过系统考察不同微纳结构薄膜在多种服役环境及交变环境下的摩擦学行为及摩擦界面特性，揭示薄膜微纳结构与选择性转移行为之间的本质关系，构建自适应薄膜微纳结构-选择性转移-摩擦界面特性匹配关系，并据此提出以微纳结构为诱导的选择性转移行为强化机制，实现高强度、低摩擦接触界面的可控构筑与结构优化，为多变环境及苛刻条件下高自适应复合薄膜材料的设计与制备提供理论依据。

本项目以TMD/DLC二元复合体系为基础发展C/N共掺杂多元复合薄膜，通过系统分析不同微纳结构薄膜在多种服役环境（潮湿大气、真空、特殊气氛、模拟空间环境）及交变环境下的摩擦学性能及摩擦界面特性，揭示了薄膜微纳结构与选择性转移行为之间的本质关系，明确了选择性转移行为对摩擦界面特性及薄膜宏观摩擦学性能的作用机理，并建立了以微纳结构为诱导的选择性转移行为强化机制及摩擦表/界面结构性能优化方案。相关研究成果丰富了多元复合自适应薄膜摩擦学理论，并为复杂多变环境及苛刻条件下的高自适应复合薄膜材料的设计与制备提供了理论依据。