Simple and scalable synthesis of super-repellent multilayer nanocomposite coating on Mg alloy with mechanochemical robustness,high-temperature endurance and electric protection  

作　　者：Shuqi Wang Yaming Wang Junchen Chen Yongchun Zou Jiahu Ouyang Dechang Jia Yu Zhou 

机构地区：[1]Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin 150080,China [2]Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology,Harbin Institute of Technology,Harbin 150001,China [3]Center of Analysis and Measurement,Harbin Institute of Technology,Harbin 150001,China [4]School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China

出　　处：《Journal of Magnesium and Alloys》2022年第9期2446-2459,共14页镁合金学报（英文）

基　　金：The partial supports from the NSFC grant nos.51571077 and 51621091;National Basic Science Research Program(2012CB933900);Advanced Space Propulsion Laboratory of BICE and Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology(Lab ASP-2020-05);Aviation Science Foundation of China(NO.20163877014);the Fundamental Research Funds for the Central Universities(HIT.BRETIII.201202)。

摘　　要：Multi-functionalization is the future development direction for protective coatings on metal surface,but has not yet been explored a lot.The effective integration of multiple functions into one material remains a huge challenge.Herein,a superhydrophobic multilayer coating integrated with multidimensional organic-inorganic components is designed on magnesium alloy via one-step plasma-induced thermal field assisted crosslinking deposition(PTCD)processing followed by after-thermal modification.Hard porous MgO ceramic layer and polytetrafluoroethylene(PTFE)nano-particles work as the bottom layer skeleton and filler components separately,forming an organic-inorganic multilayer structure,in which organic nano-particles can be crosslinked and cured to form a compact polymer-like outer layer with hierarchical surface textures.Remarkably,the chemical robustness after prolonged exposure to aqua regia,strong base and simulated seawater solution profits from polymer-like nanocomposite layer uniformly and compactly across the film bulk.Moreover,the self-similar multilayer structure coating endows it attractive functions of strong mechanical robustness(>100th cyclic rotary abrasion),stable and ultra-low friction coefficient(about 0.084),high-temperature endurance,and robust self-cleaning.The organic-inorganic multilayer coating also exhibits high insulating property with breakdown voltage of 1351.8±42.4 V,dielectric strength of 21.4±0.7 V/μm and resistivity of 3.2×10^(10)Ω·cm.The excellent multifunction benefits from ceramic bottom skeleton,the assembly and deposition of multidimensional nano-particles,and the synergistic effect of organic inorganic components.This study paves the way for designing next generation protective coating on magnesium alloy with great potential for multifunctional applications.

关 键 词：Magnesium alloy Multifunctional multilayer coating Mechanochemical robustness Robust wettability High-temperature endurance 

分 类 号：TG174.4[金属学及工艺—金属表面处理]