使用基于激光的零组速度模式对热屏障涂层板进行非接触性表征
Yu Zhang1, Zenghua Liu2, Xiaoran Wang2
1College of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
Ultrasonics
|February 13, 2026
概括
本研究介绍了一种非破坏性激光超声波方法,使用零组速度 (ZGV) 羔羊波来精确测量热屏障涂层 (TBC) 厚度. 该技术准确地估计了TBC和基板厚度,这对于飞机发动机组件维护至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试 不破坏性测试
背景情况:
- 热屏障涂层 (TBC) 对于飞机发动机的寿命至关重要,但随着时间的推移,由于高温和磨损而降解.
- 监测TBC厚度对于预测使用寿命和防止故障至关重要.
- 现有的评估方法往往缺乏在现场监测所需的精度或非接触能力.
研究的目的:
- 开发和验证一种用于准确测量热屏障涂层厚度的新型非破坏性方法.
- 为了利用零组速度 (ZGV) 羔羊波模式,提高对涂层厚度的灵敏度.
- 为了建立ZGV参数和TBC厚度之间的定量关系,以进行可靠的表征.
主要方法:
- 一个全激光超声波系统被用于无接触激发和检测Lamb波.
- 进行了有限元模拟,以识别和提取ZGV相关的参数.
- 使用最小平方和多变量回归分析将ZGV参数与涂层厚度相关联.
- 激光超声波实验验验证了开发的回归模型.
主要成果:
- 在特定的ZGV Lamb波段参数和TBC厚度之间建立了强大的线性相关性.
- 开发的方法实现了TBC厚度的平均相对误差小于7.71%,基板厚度的平均误差小于1.55%.
- 该研究证明了使用这种方法进行定量陶涂层厚度评估的可行性.
结论:
- 基于ZGV Lamb波的方法为准确的TBC厚度测量提供了一种可行的非接触技术.
- 该方法为航空航天应用的非破坏性评估提供了显著的进步.
- 将兰姆波分析与基于模型的回归结合起来,可以对陶涂层进行精确的定量评估.
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