酸性盐雾腐蚀环境下镍铜氮化硼涂层可磨耗性能研究  

Study on the Wearability of NiCu-BN Coatings in Acid Salt Spray Corrosion Environment

作　　者：李姝 王森源 谭海兵 王静 钟燕 朱昌洪 房永超 田浩亮 LI Shu;WANG Senyuan;TAN Haibing;WANG Jing;ZHONG Yan;ZHU Changhong;FANG Yongchao;TIAN Haoliang(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China;Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material,AECC Beijing Institution of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500 [2]中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京100095

出　　处：《热喷涂技术》2024年第1期86-94,共9页Thermal Spray Technology

基　　金：国家重点研发计划项目(2021YFB3702004);国家科技重大专项(2017-VII-0012-0109);国家自然科学基金资助项目(52075508,52305224)。

摘　　要：为研究镍铜氮化硼封严涂层在海洋环境下的腐蚀行为及腐蚀对涂层性能的影响,采用等离子喷涂在TC4基体上制备镍铝底层和镍铜氮化硼面层,并对涂层进行酸性盐雾腐蚀和可磨耗试验,通过XRD和SEM对涂层物相和微观结构进行表征。结果表明:镍铜氮化硼涂层经过192 h酸性盐雾腐蚀后,在腐蚀层下方形成厚度约为100μm的腐蚀致密区,在致密区内部几乎不存在孔洞。腐蚀层表面腐蚀产物主要为NaCuO_(2)和Cu_(64)O。喷涂态涂层的平均叶片高度磨损比(IDR)值为9.76%±0.35%,而腐蚀态涂层的平均IDR值为13.01%±1.6%,说明酸性盐雾腐蚀将降低涂层的可磨耗性能。涂层的磨损机制由塑性变形磨损转变为塑性变形磨损与黏着磨损混合磨损。To study the corrosion behavior of NiCu-BN sealing coatings in marine environments and the effect of corrosion on coating properties,the NiAl bottom layer and NiCu-BN top layer were prepared on TC4 substrate by plasma spraying.The coatings were subjected to acidic salt spray corrosion and abradable tests.The phase and microstructure of the coatings were characterised by XRD and SEM.The results show that after 192 h acidic salt spray corrosion of NiCu-BN coating,corrosion dense zone with a thickness of about 100μm is formed under the corrosion layer,and there are almost no holes inside the dense zone.The corrosion products on the surface of the corrosion layer are mainly micro-NaCuO_(2)and Cu_(64)O.The average IDR value(Ratio of blade height change to total feed depth)of the coating in the spraying state is 9.76%±0.35%,while the average IDR value of the coating in the corrosive state is 13.01%±1.6%,which indicates that the acidic salt spray corrosion will reduce the wearability of the coating,The wear mechanism of the coating is changed from the plastic deformation wear to the mixed wear of the plastic deformation wear and the adhesive wear.

关 键 词：等离子喷涂 封严涂层 硬度 酸性盐雾 可磨耗性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]