无机材料学报2025，Vol.40Issue(7)：799-807,9.DOI:10.15541/jim20240536
深海服役环境下碳化硅陶瓷材料的腐蚀及磨损行为
Corrosion and Wear Behavior of Silicon Carbide Ceramic in Deep-sea Service Environment
摘要
Abstract
Deepwater shaft sealing materials are one of the critical core technologies limiting the advancement of deepwater equipment.Silicon carbide(SiC)ceramics,due to their outstanding high modulus,high thermal conductivity,low density,and excellent corrosion resistance,have become an ideal choice for next-generation deep-sea sealing materials.The immense seawater pressure in deep-sea environments causes significant differences in corrosion and wear processes compared to conventional atmospheric pressure conditions.However,research on the corrosion and wear behavior of SiC ceramics in deep-sea environments remains relatively insufficient.In this study,the static pressure of artificial seawater was adjusted to simulate deep-sea conditions at depths ranging from 0 to 5 km.In-situ characterization of the materials'performance in deep-sea environments was conducted,and the influence of static pressure on their corrosion and wear properties was explored.The results indicated that SiC ceramics exhibited outstanding corrosion resistance in deep-sea environments at depths between 0 and 5 km.After immersion for 200 h,no significant corrosion,oxidation,or seawater salt-related erosion was observed on the material's surface,and no mass loss occurred.As seawater depth increased,the chemical reaction between SiC and water gradually weakened,further enhancing the corrosion resistance of SiC ceramics.After seawater corrosion,the mechanical properties of SiC ceramics remained stable.Flexural strength of the material decreased by less than 5%after 200 h-corrosion in a 5 km deep-sea environment,and Vickers hardness or fracture toughness changed little.Under seawater lubrication conditions,SiC ceramics exhibited excellent wear resistance,with a wear rate of 2×10-8-4×10-8 mm3/(N·m),much lower than that of the paired silicon nitride(Si3N4)ceramic material(4×10-5-1×10-4 mm3/(N·m)).Notably,as seawater depth increased,both the material's resistance to water corrosion and the lubricating load-bearing capacity of seawater were significantly enhanced,leading to a decrease in wear rate with increasing depth.In conclusion,SiC ceramics demonstrate significant potential for application in deep-sea sealing technologies.关键词
碳化硅/深海/腐蚀/磨损Key words
silicon carbide/deep sea/corrosion/wear分类
化学化工引用本文复制引用
王鲁杰,刘学建,乔竹辉,张玉新,李彤阳,于源,任鹏伟,王建章,汤华国,姚秀敏,黄毅华..深海服役环境下碳化硅陶瓷材料的腐蚀及磨损行为[J].无机材料学报,2025,40(7):799-807,9.基金项目
国家重点研发计划(2022YFB3706204) （2022YFB3706204）
关键陶瓷材料全国重点实验室开放课题(SKL202405SIC) （SKL202405SIC）
山东省基金项目(ZR2021JQ20) （ZR2021JQ20）
甘肃省青年科学基金(23JRRA598)National Key Technology R&D Program of China(2022YFB3706204) （23JRRA598）
Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructures(SKL202405SIC) （SKL202405SIC）
Shandong Provincial Natural Science Foundation(ZR2021JQ20) （ZR2021JQ20）
Youth Science Foundations of Gansu Province(23JRRA598) （23JRRA598）
