铝含量对钛铝二元合金MAO涂层结构及亲水性的影响  

Effect of aluminum content on structure and hydrophilicity of MAO coating of titanium aluminum binary alloy

作　　者：王聪 王伟强[1] 董旭峰[1] 齐民[1] WANG Cong;WANG Weiqiang;DONG Xufeng;QI Min(School of materials science and engineering, Dalian University of technology, Dalian 116024, China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《功能材料》2022年第6期6014-6018,共5页Journal of Functional Materials

基　　金：中央高校基本科研业务费专项(DUT18RC(6)006)。

摘　　要：金属及合金的微弧氧化(MAO)涉及在等离子体高温下电解液与合金表面的交互作用。在此过程中,合金表面的多孔层的形成,不仅与电解液成分密切相关,合金成分对涂层结构及电特性起着重要作用。通过在0.1 mol/L Na_(2)B_(4)O_(7)电解液中加入0.15 mol/L KOH,对不同Al含量的二元Ti-Al合金进行MAO,重点探究微弧氧化过程合金成分对涂层结构的影响。用扫描电子显微镜(SEM)、3D激光共聚焦显微镜分析了涂层的形貌和氧化物堆积厚度,接触角测试仪测量MAO涂层的亲水性能。结果表明,随着基体Al含量增加,MAO后的表面多孔涂层更加均匀,孔洞尺寸、氧化物堆积及电压值均有所增加。高Al含量的多孔涂层更加均匀,亲水性也更加优异。Micro arc oxidation of metals and alloys(MAO)involves the interaction between electrolyte and alloy surface at high plasma temperature.In this process,the formation of porous layer on alloy surface is not only closely related to electrolyte composition,but also plays an important role in coating structure and electrical properties.In this paper,MAO of binary Ti Al alloys with different Al content is carried out by adding 0.15 M KOH and 0.1 M Na_(2)B_(4)O_(7) electrolyte The effect of alloy composition on coating structure in micro arc oxidation process was investigated.Scanning electron microscope(SEM)and 3D laser confocal microscope analyzed the morphology and oxide accumulation thickness of the coating,and contact angle tester measured the hydrophilic properties of MAO coating.The results showed that with the increase of matrix Al content,the MAO process was more intense,which would promote the uniform formation of the coating,increase the hole size,oxide accumulation and voltage value.The coatings show good hydrophilicity,and the increase of Al content makes the coating more uniform,resulting in better hydrophilicity.

关 键 词：钛铝合金 微弧氧化 孔隙结构 亲水性 

分 类 号：TG146[一般工业技术—材料科学与工程]