摘要
研究了工业纯钛在硫酸溶液中的腐蚀行为及表面形貌演变,利用扫描电镜、粗糙度仪、能谱分析仪和X射线衍射分析仪对蚀刻前后的表面形貌、粗糙度、成分及物相组成进行分析,利用电子背散射衍射仪及透射电镜对纯钛基体的织构和显微组织进行表征。结果表明,工业纯钛的表面酸蚀处理可看作微电池腐蚀过程,具体分为3个阶段:钛氧化膜去除、钛基体溶解以及钛表层形成氢化钛吸气层。钛晶粒的取向差异导致蚀刻后钛表面形成具有取向性的多孔形貌,钛基体内析出的纳米粒子使蚀刻后的钛表面形成丰富的多孔结构。
The corrosion behaviors and surface morphology evolution of commercially pure titanium in sulfuric acid were studied,the surface morphology,roughness,elemental content and phase composition before and after etching were analyzed by scanning electron microscope,roughness meter,energy dispersive spectroscopy and X-ray diffractometer,and the texture and microstructure of pure titanium matrix were characterized by electron backscattering diffractometer and transmission electron microscope.The results show that the etching treatment of pure titanium in sulfuric acid can be regarded as microbattery corrosion,which is divided into three stages.It includes removal of oxide film,dissolution of titanium matrix and formation of titanium hydride getter layer on titanium surface.The orientation of internal grains leads to directional difference of surface porous morphology after etching,and nano-precipitated particles inside the crystal lead to rich porous structure.
作者
孔玢
李丽
刘正乔
余世伦
张孝军
雷霆
陈辰
Kong Bin;Li Li;Liu Zhengqiao;Yu Shilun;Zhang Xiaojun;Lei Ting;Chen Chen(Hunan Xiangtou Goldsky Titanium Metal Co.,Ltd.,Changsha 410025,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China;Powder Metallurgy Research Institute,Central South University,Changsha 410083,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《钛工业进展》
CAS
2022年第2期18-23,共6页
Titanium Industry Progress
基金
长沙市科技计划项目(kh2201385)。
关键词
工业纯钛
微电池腐蚀
多孔结构
纳米析出
晶粒取向
commercially pure titanium
microbattery corrosion
porous structure
nanoprecipitation
grain orientation
