热喷涂氧化铝基复合陶瓷涂层的摩擦学与耐腐蚀性能研究  

Study on tribological and anticorrosion properties of thermally sprayed alumina-based ceramic composite coating

作　　者：王传奇 吕环祥 李双建 范秀娟 毛杰 邓春明 WANG Chuanqi;LYU Huanxiang;LI Shuangjian;FAN Xiujuan;MAO Jie;DENG Chunming(The First Representative Office of Shenyang Bureau of Naval Equipment Department in Harbin,Harbin 150060,China;Institute of New Materials,Guangdong Academy of Sciences,National Engineering Laboratory of Modern Materials Surface Engineering Technology,Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangzhou 510075,China)

机构地区：[1]海装沈阳局驻哈尔滨地区第一军事代表室,黑龙江哈尔滨150060 [2]广东省科学院新材料研究所,现代材料表面工程技术国家工程实验室,广东省现代表面工程技术重点实验室,广东广州510650

出　　处：《电镀与涂饰》2025年第2期112-121,共10页Electroplating & Finishing

摘　　要：[目的]热喷涂Al_(2)O_(3)陶瓷涂层虽有良好的耐磨性、耐蚀性及化学稳定性,但润滑性差、内部存在缺陷等缺点严重制约其在海洋领域的发展。[方法]以NaAlO_(2)作为造孔剂,通过喷雾造粒后等离子喷涂,制得多孔Al_(2)O_(3)涂层,再真空浸渍环氧树脂(EP)与全氟聚醚(PFPE),获得拥有梯度润滑相的Al_(2)O_(3)-EP复合涂层。考察了造孔剂添加量对涂层孔隙率和摩擦学性能的影响。利用中性盐雾试验与电化学测试,结合微观形貌分析,研究了封孔润滑相对涂层耐腐蚀性能的影响。[结果]Al_(2)O_(3)涂层的孔隙率随着NaAlO_(2)添加量的增加而升高,能让更多EP与PFPE填充进入涂层的孔隙及微裂纹中,涂层的摩擦学性能显著增强。造孔Al_(2)O_(3)-EP复合涂层的耐腐蚀性能较纯氧化铝涂层大幅增强。如10%造孔剂含量的试样C2,其孔隙率为(28.4±3.3)%,8 N载荷下的摩擦因数为0.12±0.01,较未添加造孔剂的C0试样降低20%,其腐蚀电流密度与纯氧化铝涂层相比则降低了93.5%。[结论]通过控制造孔剂的含量来改变热喷涂氧化铝涂层内部的孔隙率,用以存储EP与PFPE,兼顾了涂层的力学性能、摩擦学性能与耐腐蚀性能,有助于拓宽氧化铝陶瓷涂层在湖泊、海洋等腐蚀环境中的应用。[Objective]Although thermally sprayed Al_(2)O_(3)ceramic coatings exhibit good wear resistance,corrosion resistance,and chemical stability,their poor lubricity and internal defects severely limit their application in marine environments.[Method]Porous Al_(2)O_(3)coatings were fabricated via plasma spraying using NaAlO_(2)as a pore-forming agent,followed by vacuum impregnation with epoxy resin(EP)and perfluoropolyether(PFPE)to create Al_(2)O_(3)-EP composite coatings with gradient lubricating phases.The effect of pore-forming agent content on the porosity and tribological properties of coating was studied.The anticorrosion performance of the coatings sealed with lubricating phases was studied by neutral salt spray test,electrochemical measurement,and microscopic morphology analysis.[Result]The porosity of Al_(2)O_(3)coating was increased with the increasing of NaAlO_(2)content,enabling more EP and PFPE to fill into the pores and microcracks of Al_(2)O_(3)coating,which significantly enhanced its tribological properties.The corrosion resistance of the porous Al_(2)O_(3)-EP composite coating was substantially improved compared to pure Al_(2)O_(3)coating.For example,the sample C2 with 10%pore-forming agent had a porosity of(28.4±3.3)%,a coefficient of friction of 0.12±0.01 under an 8 N load(20%lower than that of the sample C0 without pore-forming agent),and a corrosion current density reduced by 93.5%compared to pure Al_(2)O_(3)coating.[Conclusion]Adjusting the internal porosity of thermally sprayed Al_(2)O_(3)coating by controlling the content of pore-forming agent enables the effective storage of EP and PFPE,balancing the mechanical,tribological,and anticorrosive properties of the coating.This method broadens the application potential of Al_(2)O_(3)ceramic coatings in corrosive environments such as lakes and marine environments in the future.

关 键 词：氧化铝 喷雾造粒 热喷涂 真空浸渍 复合涂层 摩擦学 耐蚀性 

分 类 号：TL214.6[核科学技术—核燃料循环与材料]