摘要
为了进一步提高钛合金表面微弧氧化陶瓷层的性能,在硅酸钠基础电解液中添加碳纳米管制得含碳纳米管的微弧氧化复合涂层。通过X射线衍射仪和扫描电镜等手段研究了碳纳米管对微弧氧化涂层的相组成和表面形貌的影响,测量了两种涂层的膜层厚度、表面粗糙度和显微硬度。结果表明:陶瓷层的主要成分为金红石型TiO2和锐钛矿型TiO2,还有少量的SiO2、Ti6O,膜层致密,厚约20μm,含碳纳米管的复合涂层的表面粗糙度较低,显微硬度为680 HV,比基体高1倍多。
In order to further improve the property of micro-arc oxidation （MAO） ceramic layer on titanium alloy surface, carbon nano-tubes were added into sodium silicate foundation electrolyte which was used to prepare a CNTs-containing oxide composite coating. Effects of carbon nano-tubes on the phase composition and surface morphology were studied by XRD and SEM. The thickness, surface roughness and micro-hardness of two coatings were measured respectively. The results indicate that the coating consists of a large amount of rutile type TiO2 phase and anatase type TiO2, and a little SiO2 phase, Ti60 phase. The coating is dense. The thickness is approximately 20 μm. The surface roughness of CNTs-containing oxide composite coating is lower. The micro-hardness of CNTs-containing oxide composite coating is 680 HV, which is twice of that of substrate.
出处
《热加工工艺》
CSCD
北大核心
2014年第6期146-149,共4页
Hot Working Technology
基金
天津市应用基础及前沿技术研究计划资助项目(11JCZDJC21-400)
关键词
钛合金
微弧氧化
碳纳米管
组织结构
显微硬度
titanium alloy
micro-arc oxidation
carbon nano-tubes
microstructure
micro-hardness
