摘要
为探究酸性盐雾腐蚀对铝氮化硼(Al-BN)涂层可磨耗行为的影响,开展了酸性盐雾腐蚀192 h前后大气等离子喷涂制备Al-BN涂层的组织结构、表面硬度、结合强度和可磨耗性能的对比研究。结果表明:经过酸性盐雾192 h腐蚀后,Al-BN涂层表面形成了由Al,Al_(2)O_(3),NaCl,BN组成的厚度约为300~350μm的腐蚀致密层。相较于腐蚀前涂层,该腐蚀致密层的平均硬度与平均结合强度方差增大,在刮削过程中部分弱结合部位易发生刮离,并黏附于对偶叶片摩擦面,造成Al-BN涂层的进给深度比(incursion depth ratio,IDR)值由酸性盐雾腐蚀前的(11.43±0.46)%转变为酸性盐雾腐蚀后的(-12.02±0.38)%,导致Al-BN涂层的可磨耗刮磨机制由塑性变形、黏着磨损混合形式转变为塑性变形、黏着磨损、刮离黏附混合机制,摩擦因数由腐蚀前0.34±0.02提升至0.55±0.03。由此可知,酸性盐雾腐蚀对Al-BN涂层的可磨耗性能造成了不利影响。
To explore the influence of acid salt spray corrosion on the abradability behavior of Al-BN coatings,the microstructure,surface hardness,bonding strength,and abradability of Al-BN coatings prepared by atmospheric plasma spraying before and after acid salt spray corrosion for 192 h are investigated.The results show that after acidic salt spray corrosion for 192 h,the surface of the Al-BN coatings forms a corrosion dense layer composed of Al,Al_(2)O_(3),NaCl,and BN with the thickness of about 300-350μm.The variance of average hardness and average bonding strength of the corrosion-dense layer increases compared to the as-sprayed coating.During the scraping process,the weak bonding areas of the corrosion-dense layer are prone to scraping off and adhere to the friction surface of the dual blade,which causes the incursion depth ratio(IDR)values of the Al-BN coatings to change from(11.43±0.46)%before acid salt spray corrosion to(-12.02±0.38)%after acid salt spray corrosion,resulting in the abradability scraping mechanism of the Al-BN coatings changing from the mixed form of plastic deformation and adhesive wear to the mixed mechanism of plastic deformation,adhesive wear,and scraping off adhesion,the friction coefficient increasing from 0.34±0.02 before corrosion to 0.55±0.03.Therefore,the acid salt spray corrosion has a negative impact on the abradability of Al-BN coatings.
作者
房永超
李姝
刘振
李彰
王森源
王长亮
田浩亮
韩晓涵
FANG Yongchao;LI Shu;LIU Zhen;LI Zhang;WANG Senyuan;WANG Changliang;TIAN Haoliang;HAN Xiaohan(Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Materials,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China;BAIMTEC Material Co.,Ltd.,Beijing 100094,China)
出处
《材料工程》
北大核心
2025年第2期39-49,共11页
Journal of Materials Engineering
基金
国家重点研发计划项目(2023YFE0200100)
国家自然科学基金项目(52075508,52305224)
中国航空发动机集团科技创新平台项目(CXPT-2023-028)。
