陶瓷涂层结合质量的超声斜入射检测

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清华大学辅仁网/2017-07-07

陶瓷涂层结合质量的超声斜入射检测

韩赞东, 李永杰, 陈以方

清华大学先进成形制造教育部重点实验室, 摩擦学国家重点实验室, 北京 100084

Oblique-incidence ultrasonic testing for the adhesion quality of ceramic coatings

HAN Zandong, LI Yongjie, CHEN Yifang

State Key Laboratory of Tribology, Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Tsinghua University, Beijing 100084, China

摘要:

输出: BibTeX | EndNote (RIS)

摘要金属基体表面涂覆的非金属涂层可以提高基体的耐腐蚀、耐高温等性能，涂层的结合质量是涂层性能的重要指标。传统的超声透射和反射方法可以实现对涂层脱粘的检测，但是对于非脱粘涂层结合质量的检测较为困难。该文采用超声斜入射反射检测法，对不同结合质量的非金属涂层进行检测，利用频谱分析技术计算得到斜入射非线性系数。检测结果表明：斜入射非线性系数可以反映非金属涂层的结合质量，涂层的脱粘情况可以通过基频的幅值判断，而在非脱粘情况下，斜入射非线性系数越大，则涂层结合质量越差。

关键词 ：陶瓷涂层,结合质量,超声检测,非线性系数

Abstract：Non-metallic coatings on the surfaces of metal substrates can improve the corrosion resistance and high temperature performance of the substrates. The adhesion quality of the coatings is an important index for coating performance. Conventional ultrasonic transmission and reflection methods can detect coating de-bonding, but cannot easily detect the adhesion quality of the bonded coating. Non-metallic coatings with different adhesion qualities are evaluated using an oblique-incidence radiative method. The nonlinear coefficients of the oblique-incident wave are calculated using spectral analysis techniques. The results show that the nonlinear coefficients of the oblique-incident wave reflect the adhesion quality of the ceramic coatings. The bonding quality of the coating can then be evaluated by the amplitudes of the fundamental frequency. For a bonded coating, a greater nonlinear coefficient indicates worse adhesion quality.

Key words：ceramic coating adhesion quality ultrasonic testing nonlinear coefficient

收稿日期: 2016-11-11 出版日期: 2017-05-20

ZTFLH:	TG115.28
	TB553

引用本文:

韩赞东, 李永杰, 陈以方. 陶瓷涂层结合质量的超声斜入射检测[J]. 清华大学学报（自然科学版）, 2017, 57(5): 454-458.
HAN Zandong, LI Yongjie, CHEN Yifang. Oblique-incidence ultrasonic testing for the adhesion quality of ceramic coatings. Journal of Tsinghua University(Science and Technology), 2017, 57(5): 454-458.

链接本文:

http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.22.020或 http://jst.tsinghuajournals.com/CN/Y2017/V57/I5/454

图表:

图1 斜入射水浸超声检测

图2 涂层结合质量检测试样

表1 水浸超声检测各层声学参数

图3 水浸超声检测系统

图4 斜入射与直入射超声接收信号

图5 超声接收探头的频谱

表2 各试样频谱幅值

图6 基频幅值和斜入射非线性系数

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