铜铝/镍石墨可磨耗封严涂层相选择性溶解机制有限元研究  

Finite Element Study on Phase-selective Dissolution Mechanism of CuAl-NiC Abradable Seal Coating

作　　者：倪雨朦 于英杰 严慧 王嵬[4] 李瑛[1] NI Yumeng;YU Yingjie;YAN Hui;WANG Wei;LI Ying(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou 412007,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Department of Chemical Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]湖南工业大学材料与先进制造学院,株洲412007 [3]中国科学技术大学材料科学与工程学院,沈阳110016 [4]东北电力大学化学工程学院,吉林132012

出　　处：《中国腐蚀与防护学报》2023年第4期855-861,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51671198)。

摘　　要：以铜铝/镍石墨可磨耗封严涂层为研究对象,利用有限元方法对涂层腐蚀初期发生的相选择性溶解反应进行仿真模拟,探究涂层选材成分比与其耐蚀性的关系。所建腐蚀模型的几何尺寸和边界条件分别由形貌表征与电化学测试结果而确定。建模模拟后,将模拟结果中的涂层自腐蚀电位及溶解情况分别与极化曲线实测涂层自腐蚀电位及ICP-OES实测涂层的溶解结果对比可见,模拟结果与实测结果一致,验证了模型的可靠性。所建模型在一定程度上阐释了涂层选材与其耐蚀性的关系,为未来涂层的耐蚀设计提供相应的参考。Abradable seal coatings is widely used in the field of aerospace industry,since it can improve the efficiency of the aero-engine.Due to its special structure and composition,abradable seal coatings would face severe corrosion failure problems.Therefore,the phase-selective dissolution reaction in the early stage of corrosion of the CuAl-NiC abradable seal coating in NaCl solution is simulated by means of finite element method(FEM).Morphology characterization and electrochemical test were conducted to determine the geometric dimensions and boundary conditions required for FEM.The FE simulation was then carried out,while the modeling results were compared with the free-corrosion potential of the coating measured by the polarization curve,and the dissolution results of the ICP-OES test to verify the reliability of the established model.Furthermore,by inputting the composition ratio and the electrochemical properties of substances of a newly designed coating into the established model,its corrosion resistance can be acquired,which will provide some insights for the design of abradable seal coatings.

关 键 词：可磨耗封严涂层 电偶腐蚀 有限元 腐蚀防护 

分 类 号：TG174[金属学及工艺—金属表面处理]