An accurate interface detection of TBCs coated blades by double pulse femtosecond laser-induced breakdown spectroscopy

被引：2

作者：

Xu, Zhao ^{[1
]}

Jiang, Lan ^{[1
]}

Wang, Sumei ^{[1
]}

Sun, Jiaxin ^{[1
]}

Zhan, Jie ^{[1
]}

Zhu, Weihua ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, Laser Micro Nano Fabricat Lab, Beijing 100081, Peoples R China

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2025年 / 224卷

关键词：

Laser-induced breakdown spectroscopy; Femtosecond laser; Interface detection; Double pulse; REAL-TIME; ENHANCEMENT; PLASMA; LAYERS; EFFICIENCY; ABLATION; LIBS;

D O I：

10.1016/j.sab.2024.107088

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

To control the laser machining process of cooling holes on thermal barrier coatings (TBCs) deposited on turbine blades, we implemented interface detection in the depth direction by employing femtosecond-laser-induced breakdown spectroscopy (fs-LIBS). With the plasma reheating and reionization effects of double pulses, a maximum spectral enhancement factors of 12.5 was obtained. The signal-to-noise ratio of the spectrum was improved with decreasing the ablation volume. As a result, accurate detection of the interfaces between the yttria-stabilized zirconia (YSZ) coating, Ni-based superalloy substrate and glass slide was achieved. The comparison of the LIBS results with the energy-dispersive X-ray spectroscopy (EDS) confirmed the effectiveness of the detection method, which exhibited a minimum ablation rate of 255 nm per pulse. Furthermore, a practical online detection approach was proposed for depth profiling and breakdown detection during the machining process of multilayer materials with a maximum detection depth of 273 mu m.

引用

页数：10

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