結合強度的影響
(西安理工大學 材料科學與工程學院， 西安 710048)
摘 要: 采用微弧氧化法于硅酸鈉溶液體系中在鈦合金表面制備了氧化物陶瓷膜，用剪切法測試了氧化膜與環(huán)氧樹脂之間的結合強度， 通過SEM研究了陶瓷膜剪切前后表面形貌的變化。結果表明： 陶瓷膜表面的微孔直徑、 粗糙度隨微弧氧化頻率的增大而減小； 陶瓷膜/環(huán)氧樹脂的結合強度隨頻率的增加先是快速上升， 當頻率增加至400Hz時， 膜層的結合強度達到最高值56.9MPa， 隨后結合強度逐漸下降并趨于平緩。
關鍵字: 鈦合金； 微弧氧化； 膜層； 表面形貌； 結合強度
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
