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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >FIELD INSPECTION OF CERAMIC MATRIX COMPOSITES
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FIELD INSPECTION OF CERAMIC MATRIX COMPOSITES

机译：陶瓷基复合材料的现场检查

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摘要

All the methods investigated (ultrasonic, thermographic and shearographic) detected impact damage in ceramic matrix composites. Only ultrasonic, thermographic methods were capable of characterizing the extent of the damage. Pulse echo ultrasonic testing in the time domain was found to be ineffective due to the extensive incoherent scattering caused by the many voids present in CMC materials. Frequency domain pulse echo ultrasonic testing was effective, both conventional and laser based. The use of an appropriate paint increased the performance of LBU. Pulsed infrared thermography was extremely rapid and effective at characterizing the defects. Shearography was deemed unable to characterize the extent of damage, although the presence of damage could be detected. The applicability of each of the inspection methods is summarized in Table 1 below (UT PE and TT are conventional pulse echo and through transmission ultrasonic inspection, LBU is laser based ultrasonic inspection, FB is flexible blanket ultrasonic inspection, Th is pulsed infrared thermography and Sh is shearography).
机译：研究的所有方法（超声波，热成像和剪切成像）都可以检测出陶瓷基复合材料的冲击损伤。只有超声，热成像方法才能表征损坏的程度。由于在CMC材料中存在许多空隙，导致广泛的非相干散射，因此在时域中进行脉冲回波超声测试无效。常规和基于激光的频域脉冲回波超声测试都是有效的。使用适当的涂料可提高LBU的性能。脉冲红外热成像技术非常快速且有效地表征了缺陷。尽管可以检测到损坏的存在，但剪切成像被认为无法表征损坏的程度。下表1总结了每种检查方法的适用性（UT PE和TT是常规脉冲回波并通过透射超声检查，LBU是基于激光的超声检查，FB是柔性毯式超声检查，Th是脉冲红外热成像和Sh是剪切成像）。

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