北京航空航天大学学报

• •    

腐蚀环境影响下薄膜传感器金属结构裂纹监测

谭翔飞1,何宇廷1,侯波1,崔荣洪2,冯宇1   

  1. 1. 空军工程大学航空航天工程学院
    2.
  • 收稿日期:2016-06-21 修回日期:2016-09-12 发布日期:2016-10-10
  • 通讯作者: 何宇廷
  • 基金资助:
    国家自然科学基金

Metal Structure Crack Monitoring Based on Film Sensor under Corrosion Environment

  • Received:2016-06-21 Revised:2016-09-12 Published:2016-10-10
  • Supported by:
    National Natural Science Foundation of China

摘要: 薄膜传感器在飞机金属结构损伤监测过程中,将长期面临大气腐蚀环境的影响。针对此背景,研究了铜薄膜传感器在腐蚀环境下的耐蚀性能,及腐蚀影响后的疲劳裂纹监测性能。首先,采用脉冲偏压多弧离子镀技术在不同弧电流和基体负偏压水平下制备了一系列铜薄膜,对其耐腐性能进行了对比研究。结果表明,在弧电流60A和基体偏压250V时沉积的铜薄膜耐蚀性能最佳。然后,结合耐蚀性能最佳的沉积工艺参数,在2A12-T4铝合金中心孔板试验件上制备了同心环状铜薄膜传感器阵列,并开展了盐雾腐蚀试验;最后,对腐蚀试验后的薄膜传感器进行了疲劳裂纹监测实验。结果表明:铜薄膜传感器在腐蚀环境下具有良好的耐蚀性能,耐腐蚀时间达1000小时;腐蚀试验后的薄膜传感器对裂纹变化敏感,能实现对裂纹定量监测,监测精度为1mm,监测结果具有良好的可重复性。

关键词: 结构健康监测, 铜薄膜传感器, 耐蚀性能, 裂纹, 金属结构

Abstract: In the process of monitoring aircraft metal structure crack, film sensor is exposed to atmospheric corrosion environment. The corrosion resistance of copper film sensor and crack monitoring performance after corrosion experiment was researched under the background. Firstly, copper films were deposited by pulsed bias arc ion plating technique at difference levels of current and negative substrate bias. The corrosion resistance was researched. The result shows that the optimal corrosion resistance of copper film was deposit at level of current 60A and negative substrate 250V. Then, a concentric ring copper film sensor array was deposited on 2A12-T4 aluminum alloy using the optimal depositing parameter. A salt-spray environment experiment was carried out. Finally, a fatigue crack monitoring experiment was carried out using the copper film sensor which exposed in corrosion environment. The result shows that the copper film sensor have good corrosion resistance. The corrosion time reaches 1000 hours. The film sensor is very sensitive to fatigue crack and can realize quantitative monitoring, with the accuracy of 1mm. Besides, the monitoring results is repeatable.

Key words: structure health monitoring, copper film sensor, corrosion resistance, crack, mental structure


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发