摘要
热障涂层(TBC)是航空航天发动机涡轮叶片的主要防护材料,对其进行表面裂纹缺陷和界面脱粘缺陷的无损检测具有重大意义。对热障涂层的传统检测方法(如渗透检测、涡流检测、超声或超声显微检测等),以及新型红外热成像方法在内的无损检测方法进行了介绍和归纳,重点介绍了光激励、涡流激励和超声激励3种主动式红外热成像无损检测技术。其中,对激光扫描热成像法进行了详细介绍,该方法具有非接触、操作简单、灵敏度高、全场范围内检测快速的优点,能够实现宽度为10μm以上的裂纹和直径为1mm以上脱粘缺陷的无损检测;透射式涡流热成像具有识别小于1mm脱粘缺陷的能力。
Thermal barrier coating （TBC） is the main protective material of engine turbine blade in the aerospace. It is of great significance of nondestructive testing of surface crack defects and interracial disbonding defects. The traditional nondestructive testing of thermal barrier coatings is introduced and summarized, including penetration testing, eddy current testing ultrasound or ultrasound microscopic detection and new nondestructive testing of infrared thermography, focusing on the optical excitation, the eddy current excitation and the ultrasonic excitation. The laser scanning thermographic method is introduced in detail among them. This method has the advantages of non-contact, simple operation, high sensitivity and rapid detection in the whole field. It can achieve detection ability that the width of crack defect is above 10μm and the diameter of disbonding defect is above 1 mm. And the eddy current thermography has the ability to identify disbonding defect which is less than lmm.
出处
《航空制造技术》
2016年第4期43-47,共5页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(11232008
11372037)
关键词
热障涂层(TBC)
激光扫描热成像法
涡流热成像法
超声热成像法
后处理方法
Thermal barrier coating（TBC）
Laser scanning thermography
Eddy current thermography
Ultrasound thermography
Post-processing method
