复合zigzag结构CrN涂层的设计制备及冲蚀性能  

Preparation and Erosion Performance of Composite CrN Coatings Through Zigzag Structural Design

作　　者：王丽 王振玉 陈仁德 柯培玲 汪爱英[1] WANG Li;WANG Zhenyu;CHEN Rende;KE Peiling;WANG Aiying(Key Laboratory of Marine Materials and Related Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室,宁波315201

出　　处：《中国表面工程》2023年第3期65-73,共9页China Surface Engineering

基　　金：中科院创新团队(292020000008);宁波市基金(2021J217,2022Z011)资助项目。

摘　　要：飞机在沙漠等恶劣环境中服役,空气中的固体颗粒在高速气流作用下对叶片表面产生高速冲击。为提高钛合金叶片的抗冲蚀性能,采用掠角磁控溅射技术制备复合zigzag结构CrN涂层(简称CrN-zigzag),并利用掠角X射线衍射仪(GIXRD)、扫描电子显微镜(SEM)、划痕测试系统(CSM Revetest)、白光干涉仪、纳米压痕仪、冲蚀设备等表征涂层的成分、组织结构、力学性能和冲蚀性能。研究结果表明,CrN-zigzag涂层组织致密呈现柱状结构,厚度约为3.7μm,纳米硬度达到(19.2±2)GPa,具有良好的膜基结合强度(>48 N)。相比于常规CrN涂层,CrN-zigzag涂层在90°冲蚀角度下的抗冲蚀性能提高了57.67%。CrN涂层表现为明显的脆性失效特征,CrN-zigzag涂层表现为明显的脆性和韧性失效双特征,符合变形磨损理论和二次冲蚀理论。CrN-zigzag涂层在砂砾冲蚀试验中表现出良好的抗冲蚀性能主要归因于其特有的zigzag晶界取向设计,提高了材料的损伤容限。With the rapid development of aircraft,titanium alloys have been widely adopted as promising lightweight materials to resist harsh marine conditions,in particular for compressor engine blades.However,due to their poor mechanical properties,titanium alloys are vulnerable to erosion damage when operating in a solid-particle sandy environment.CrN coatings are considered the most promising candidate to suppress erosion damage due to their combined mechanical properties and easily controlled structures during deposition.However,CrN coatings with a traditional columnar structure suffer from serious erosion damage under the harsh impact of solid particles.The issue of how to design and fabricate CrN coatings with the necessary comprehensive mechanical performance is of significant importance for the development of aircraft high-technology.In this study,CrN-zigzag coatings were fabricated by tilting magnetron sputtering technique,and,importantly,the middle layer exhibited a designed zigzag structure that could dissipate crack energy and deflect cracks induced by erosion.The morphology and crystallographic structure of the coatings was characterized by field emission scanning electron microscopy and grazing incidence X-ray diffraction.The nano-indentation was employed to measure the mechanical properties of coatings,including hardness(H),elastic modulus(E),H/E,and H3/E2.The adhesion strength of the coatings to the substrates was determined by scratch tests.The erosion tests were performed at room temperature by a homemade test rig according to the ASTM G76-13 standard.The thickness of the CrN-zigzag coatings was 3.7μm.The hardness of the normal CrN coatings was 22.4±3 GPa,while it decreased to 19.2±2 GPa for the CrN-zigzag coatings.Compared with the normal CrN coatings,the H/E ratio of CrN-zigzag coatings has increased by~12.16%.However,the H3/E2 ratio increases from 0.125 GPa up to 0.133 GPa,indicating that the resistance to plastic deformation of the CrN coatings could be significantly improved by introducing the til

关 键 词：磁控溅射 Zigzag结构 CRN涂层 冲蚀性能 

分 类 号：TG156[金属学及工艺—热处理] TB114[金属学及工艺—金属学]