钛合金表面离子束增强沉积膜层的环境适应性和接触相容性

Environmental Adaptability and Contact Compatibility of Ion Beam Enhanced Deposition Films on Titanium Alloy

利用离子束增强沉积技术在钛合金表面制备CrN硬质抗磨层和CuNiIn固体润滑膜层。通过电化学测试技术对比研究了膜层和钛合金基材在含Cl-介质中的抗蚀性能和接触腐蚀敏感性,利用高温静态氧化方法评价了膜层的抗氧化性能。结果表明:(1)CuNiIn膜层耐电化学腐蚀性能和抗氧化性能显著优于Cu,在含Cl-介质中与钛合金接触相容。(2)在含Cl-水溶液中,CrN膜层耐蚀性好,与钛合金接触相容;在HCl+HF混合酸中,CrN膜耐蚀性能远优于钛合金;抗氧化性能优于Ti。

Both CrN hard coatings and CuNiIn solid lubricating films were produced on the titanium alloy substrate by the ion beam enhanced deposition (IBED) technique. The electrochemical corrosion behavior and galvanic corrosion sensitivity of the IBED films and titanium alloy in NaCl solution were studied by using electrochemical measurement methods. The oxidation resistance of the IBED films was evaluated by the elevated temperature static oxidation method. The results show that both the electrochemical corrosion resistance and the oxidation resistance of IBEDD CuNiIn film are better than those of bulk copper. IBED CuNiIn film is contact compatible with titanium alloy substrate in Cl- solution. IBED CrN film has good corrosion resistance compared with the titanium alloy in both Cl- solution and HCl + HF mixed acid solution, it can directly contact with titanium alloy in Cl- solution. The oxidation resistance of CrN film is better than that of the titanium alloy substrate.