结合强度的影响
(西安理工大学 材料科学与工程学院， 西安 710048)
摘 要: 采用微弧氧化法于硅酸钠溶液体系中在钛合金表面制备了氧化物陶瓷膜，用剪切法测试了氧化膜与环氧树脂之间的结合强度， 通过SEM研究了陶瓷膜剪切前后表面形貌的变化。结果表明： 陶瓷膜表面的微孔直径、 粗糙度随微弧氧化频率的增大而减小； 陶瓷膜/环氧树脂的结合强度随频率的增加先是快速上升， 当频率增加至400Hz时， 膜层的结合强度达到最高值56.9MPa， 随后结合强度逐渐下降并趋于平缓。
关键字: 钛合金； 微弧氧化； 膜层； 表面形貌； 结合强度
titanium alloy on bonding strength of coating/epoxy resin
（School of Materials Science and Engineering,
Xi′an University of Technology, Xi′an 710048, China）
Abstract: The micro-arc oxidation ceramic coatings were formed on the titanium alloy surface by micro-arc oxidation in Na2SiO3 solution using an AC power. The shearing test was employed to determine the bonding strength of the coating/epoxy resin. The surface morphologies of the coatings before and after the shearing test were observed by SEM. The results show that during micro-arc oxidation, as the frequency increases, the pores size decreases, so does the surface roughness. The bonding strength of coating/epoxy resin increases with increasing frequency, and reaches a maximum value of 56.9MPa at 400Hz, then decreases gradually down to a relative stable value.
Key words: titanium alloy; micro-arc oxidation; coating; surface morphology; bonding strength
