TiO_2微弧氧化膜的生长过程及特性变化  

Study on Growth Process and Characteristics Change of TiO_2 Micro-Arc Oxidation Coating

作　　者：刘世敏[1] 李宝娥[2] 乔志霞[3] 

机构地区：[1]天津商业大学宝石及材料工艺学系,天津300130 [2]河北工业大学材料科学与工程学院,天津300130 [3]天津商业大学机械工程学院,天津300134

出　　处：《材料保护》2016年第1期6-9,共4页Materials Protection

基　　金：国家自然科学基金(51401146;51201056;51204121)资助

摘　　要：为了进一步研究钛材表面TiO_2微弧氧化膜的生长过程和生长模式,采用物理分析技术分析了其微弧氧化过程中不同放电阶段膜表面的形貌、膜层厚度、相成分、表面粗糙度和硬度的变化。结果表明:TiO_2多孔膜最初以孤立的岛状生长模式生长,随微弧氧化反应的进行,孤立的岛状氧化膜彼此相连接,膜表面形貌和厚度逐渐趋于一致,氧化膜的孔径、厚度、粗糙度和硬度均有增加;膜的相成分由亚稳的锐钛矿向高温下更加稳定的金红石转变,羟基磷灰石(HA)的量逐渐增加;TiO_2膜所呈现的特性与微弧氧化过程中不同阶段的放电特性密切相关。For further analyzing the growth process and growth mode of TiO_2 micro- arc oxidation(MAO) coating on Ti substrate,the surface morphology,thickness,phase composition,surface roughness and hardness of the coatings during different discharge stages of micro-arc oxidation were discussed by physical analysis technology.Results showed that the porous TiO_2 coating grew in the isolated island- like growth mode in the initial stage.Subsequently,with the micro-arc oxidation progressing,the isolated island-like oxidation film began to connect with each other.The surface morphology and thickness gradually became uniform,and the pore size,thickness,roughness and hardness increased.Moreover,at high temperature the phase composition changed into more stable rutile phase from the metastable anatase phase.The content of hydroxyapatite(HA) gradually increased.In general,the characteristics of TiO_2 coating were closely related to the discharge characteristics during different stages of microarc oxidation process.

关 键 词：TiO2微弧氧化膜 钛材 膜的生长模式和过程 膜的特性 

分 类 号：TG178[金属学及工艺—金属表面处理]