Self-lubricating epoxy-based composite abradable seal coating eliminating adhesive transfer via hierarchical design

作     者：Yun-qi Tong Wei Li Qiu-sheng Shi Lin Chen Guan-jun Yang Yun-Qi Tong;Wei Li;Qiu-Sheng Shi;Lin Chen;Guan-Jun Yang

作者机构：State Key Laboratory for Mechanical Behavior of MaterialsSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China AECC Hunan Aviation Powerplant Research InstituteZhuzhou 412002China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第104卷第9期

页      面：145-154页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Science and Technology Major Project(No.2017-VII-0012-0107) the National Program for Support of Top-notch Young Professionals 

主　　题：Epoxy-based composite coating Hierarchical structure design Self-lubricating Pseudoplastic deformation 

摘      要：Aluminum-based composite abradable seal coatings are pivotal to improving the efficiency of aero engines or gas ***,the adhesive transfer frequently occurs between metallic blade tips and aluminum-based composite coatings,resulting in engine vibration and even *** past studies had tried to solve this problem by reducing coating hardness,improving lubrication,or strengthening blade tips,but all had *** this paper,we proposed a novel epoxy-based composite abradable seal coating,eliminating adhesive transfer by changing metal-to-metal scraping pair to metal-to-polymer scraping *** coating was developed via a hierarchical structure *** spherical pores were uniformly distributed in the continuous epoxy matrix with fine graphite *** adding 20 vol.%graphite and 50 vol.%hollow microspheres,a self-lubricating epoxy-based coating of 0.26 friction coefficient with thermal conductivity of 0.28 W/(m·K),coating HR15 Y hardness at 54.8,and bonding strength at 18.7 MPa can be *** the metallic blades scrape the epoxy-based composite coating,no adhesive transfer ***,a smooth scraped surface is formed by pseudoplastic *** epoxy-based composite abradable seal coating opens a new way to improve the efficiency and reliable operations of air engine compressors.