航空学报 > 2016, Vol. 37 Issue (4): 1393-1400   doi: 10.7527/S1000-6893.2015.0126

阳极氧化膜厚度对TB8钛合金表面特性及其粘结性能的影响

余永水1, 谢兰生1, 陈明和1, 欧阳金栋2, 周希文3   

  1. 1. 南京航空航天大学机电学院, 南京 210016;
    2. 江西洪都航空工业集团有限公司, 南昌 330024;
    3. 江西洪都航空工业股份有限公司, 南昌 330024
  • 收稿日期:2015-04-09 修回日期:2015-05-06 出版日期:2016-04-15 发布日期:2015-05-25
  • 通讯作者: 谢兰生,Tel.:025-84892508 E-mail:meelsxie@nuaa.edu.cn E-mail:meelsxie@nuaa.edu.cn
  • 作者简介:余永水,男,硕士研究生。主要研究方向:钛合金表面处理、钛合金精密成形技术。E-mail:yuyoshui@163.com;谢兰生,男,博士,教授,博士生导师。主要研究方向:钛合金表面工程,难加工材料成形技术,塑性成形仿真技术,超塑性成形/扩散连接技术。Tel:025-84892508 E-mail:meelsxie@nuaa.edu.cn;陈明和,男,博士,教授,博士生导师。主要研究方向:钛合金及难成形材料成形技术,材料成形性能分析与评价,材料超塑性及成形/扩散连接技术,飞机(飞行器)钣金精密制造及抗疲劳制造技术。Tel:025-84892508 E-mail:meemhchen@nuaa.edu.cn
  • 基金资助:

    江西省重大科技专项-先进直升机关键技术项目(20114ABE02100103103)

Effects of anodic oxide film thickness on surface characterization and adhesive strength of TB8 titanium alloy

YU Yongshui1, XIE Lansheng1, CHEN Minghe1, OUYANG Jindong2, ZHOU Xiwen3   

  1. 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Jiangxi Hongdu Aviation Industry Group Company Ltd, Nanchang 330024, China;
    3. Jiangxi Hongdu Aviation Industry Co. Ltd, Nanchang 330024, China
  • Received:2015-04-09 Revised:2015-05-06 Online:2016-04-15 Published:2015-05-25
  • Supported by:

    Major Science and Technology Projects in Jiangxi Province-The Advanced Helicopter Key Technology Program (20114ABE02100103103)

摘要:

采用以酒石酸钠为主盐的电解体系对TB8钛合金进行阳极氧化,研究阳极氧化膜厚度对TB8钛合金表面特性及其与环氧树脂粘结性能的影响。采用SEM、XRD和EDS分析了阳极氧化膜的微观形貌和晶体结构,采用角接触测量仪和三维视频显微镜分别对阳极氧化膜的表面润湿性和粗糙度进行测量。研究了不同厚度TB8钛合金阳极氧化膜的粘结性能与表面形貌、相组成、润湿性及粗糙度的关系。结果表明:采用以酒石酸钠为主盐的电解体系对TB8钛合金进行阳极氧化处理,氧化时间为15 min,电压为1~30 V时,能够在钛合金表面形成一层1~4μm厚的阳极氧化膜;氧化膜主要由金红石型和锐钛型TiO2混合晶体组成,其表面具有微纳多孔的粗糙结构;随着厚度的增加,阳极氧化膜对水的润湿性能逐渐增强。当氧化膜厚度为3μm时,可获得最大粘结强度为19.6 MPa,相对于母材提高了88.5%,同时,水接触角为43.2°,相对于其母材减少了56.1%;粗糙度为2.14μm,相对于母材提高了137.8%。

关键词: 阳极氧化, TB8钛合金, 表面形貌, 粘结性能, 润湿性, 粗糙度

Abstract:

The TB8 titanium alloy is anodized in the sodium tartrate electrolyte to investigate the effects of anodic oxide film thickness on the surface characterization and adhesive strength between the anodic oxide nanostructures and the epoxy resin. SEM, XRD and EDS are used to evaluate the morphology and crystalline structure of the anodic oxide films. The wettability and roughness of the anodic oxide films are measured using a contact angle meter and a digital video microscope. The correlation between the adhesive strength, surface morphology, phase composition, roughness and wettability of the anodic oxide film of TB8 titanium alloy is investigated. The results show that an anodic oxide film about 1-4 μm thick is formed on the surface after anodic oxide in the sodium tartrate electrolyte at the voltage of 1-30 V for 15 min. The anodic oxide film, which is mainly composed by rutile TiO2 and anatase TiO2, has a micro-and nano-porous rough structures and the wettability of water increases with the increase of the anodic oxide film thinkness. The maximum shear strength (19.6 MPa) is obtained when the thickness of the anodic oxide film is about 3 μm, which is improved by 88.5%, and the water contact angle is 43.2°, decreased by 56.1%; the surface roughness is 2.14 μm, improved by 137.8%.

Key words: anodic oxide, TB8 titanium alloy, surface morphology, adhesive properties, wettability, roughness

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