添加HfO_(2)对钛合金微弧氧化膜层特性的影响  

Effect of Adding HfO_(2) on the Properties of Micro-arc Oxidation Film on Titanium Alloy

作　　者：王香洁 王平[1] 刘毅 杨彪 伍婷[1] Wang Xiangjie;Wang Ping;Liu Yi;Yang Biao;Wu Ting(Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学,四川成都610500

出　　处：《稀有金属材料与工程》2023年第10期3452-3460,共9页Rare Metal Materials and Engineering

基　　金：四川省科技计划(2022YFSY0018);钒钛资源综合利用国家重点实验室开放基金(2022P4FZG08A);四川省页岩气高效开采先进材料制备技术工程研究中心开放基金(2022SCYYQKCCL007)。

摘　　要：在电解液中添加HfO_(2)对Ti-6Al-4V钛合金进行微弧氧化处理,通过观察微弧氧化膜表、截面形貌,分析膜层成分及电化学行为,并测量膜层厚度、硬度、粗糙度等参数,来研究添加HfO_(2)对钛合金微弧氧化膜层特性的影响。结果表明:添加HfO_(2)后,微弧氧化膜层相组成是Al_(2)TiO_(5)、TiO_(2)和γ-Al_(2)O_(3)。较合适浓度的HfO_(2)能促进成膜反应,改善微弧氧化膜的微观结构,提高膜层的厚度、硬度并降低表面粗糙度,且膜层具有双层膜结构,膜层试样的耐腐蚀性能优于原基体。HfO_(2)浓度为3.0 g/L时所获得的微弧氧化膜层综合性能最佳。Ti-6Al-4V titanium alloy was treated with micro-arc oxidation(MAO)by adding HfO_(2) into the electrolyte.The effect of adding HfO_(2) on the characteristics of the MAO film on titanium alloy was studied by characterizing the surface and cross-section morphologies,the composition of the film and the electrochemical behavior,and measuring the thickness,hardness,roughness and other parameters of the film.The results show that after adding HfO_(2),the main components of the MAO film are Al_(2)TiO_(5),TiO_(2) and γ-Al_(2)O_(3).The appropriate concentration of HfO_(2) can promote the film-forming reaction,improve the microstructure of the MAO film,improve the thickness and hardness of the film and reduce the surface roughness.The MAO film sample has a double-layer structure,and the corrosion resistance of the film sample is better than that of the original substrate.When the concentration of HfO_(2) is 3.0 g/L,the comprehensive performance of the MAO film is the best.

关 键 词：钛合金 微弧氧化 HfO_(2) 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]