Characterizing the Thermally Grown Oxide in Thermal Barrier Coating by Terahertz Time Domain Spectroscopy

被引：6

作者：

Zhao, Wenhan ^{[1
]}

Wang, Shibin ^{[2
]}

Li, Lin'an ^{[2
]}

Liu, Delin ^{[2
]}

Li, Chuanwei ^{[2
]}

Wang, Zhiyong ^{[2
]}

机构：

[1] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China

[2] Beijing Inst Aeronaut Mat, Aviat Key Lab Sci & Technol Adv Corros & Protect A, Beijing 100094, Peoples R China

来源：

COATINGS | 2023年 / 13卷 / 02期

基金：

中国国家自然科学基金;

关键词：

non-destructive; thermal barrier coatings; terahertz time-domain spectroscopy; thermally grown oxide; optimization algorithm; SEM observation; IN INFRARED THERMOGRAPHY; THICKNESS;

D O I：

10.3390/coatings13020376

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents a method to simultaneously measure the thickness and refractive index of the thermally grown oxide (TGO) in thermal barrier coating (TBC) by using a reflective terahertz time-domain spectroscopy (THz-TDS) system. First, an optical transmission model of THz radiation in the multilayer structure of TBC is established. Owing to the different structures of TBC before and after forming the TGO layer, two different transmission models are established, respectively. Then, the experimental signals from the samples after different thermal cycles are obtained by the THz-TDS system. By fitting the experimentally measured reflected THz signals from the TBC samples to the proposed optical model using an optimization algorithm, the thickness and refractive index of the TGO are determined. In this work, four samples with different thicknesses of TGO layers are analyzed. The results of thickness of TGO layer are verified by SEM observation, and a reasonable agreement is obtained.

引用

页数：9

共 50 条

[41] Characterizing polymorphism and crystal transformation of polylactide by terahertz time-domain spectroscopy
Li, Han
Ye, Hai-Mu
Yang, Yuping
POLYMER TESTING, 2017, 57 : 52 - 57
[42] Piezo-spectroscopic mapping of the thermally grown oxide in thermal barrier coatings
Wang, X.
Atkinson, A.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 465 (1-2): : 49 - 58
[43] Characterization of a cyclic displacement instability for a thermally grown oxide in a thermal barrier system
Mumm, DR
Evans, AG
Spitsberg, IT
ACTA MATERIALIA, 2001, 49 (12) : 2329 - 2340
[44] DETERMINATION OF THE FRACTURE TOUGHNESS OF THERMALLY GROWN OXIDE (TGO) IN A THERMAL BARRIER SYSTEM
Malzbender, Juergen
Escobar, Isabel
Herzog, Roland
Steinbrech, Rolf W.
Oettel, Heinrich
ADVANCES IN CERAMIC COATINGS AND CERAMIC-METAL SYSTEMS, 2005, 26 (03): : 55 - 62
[45] The displacement of the thermally grown oxide in thermal barrier systems upon temperature cycling
Karlsson, AM
Hutchinson, JW
Evans, AG
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 351 (1-2): : 244 - 257
[46] Temperature dependent dynamic growth of thermally grown oxide in thermal barrier coatings
Lim, L. Y.
Meguid, S. A.
MATERIALS & DESIGN, 2019, 164
[47] Spallation of thermal barrier coatings with real thermally grown oxide morphology under thermal stress
Zhu, W.
Zhang, Z. B.
Yang, L.
Zhou, Y. C.
Wei, Y. G.
MATERIALS & DESIGN, 2018, 146 : 180 - 193
[48] Combined effect of thermally grown oxide growth and calcium-magnesium-alumino-silicate infiltration in thermal barrier coating system
Chiu, C. C.
Tseng, S. C.
Chao, C. K.
Li, M. D.
CERAMICS INTERNATIONAL, 2022, 48 (24) : 37075 - 37084
[49] Evaluation of Applicability of Compact Excitation Light Source to Detection of Thermally Grown Oxide Layer in Thermal Barrier Coating for Gas Turbines
Fukuchi, Tetsuo
Eto, Shuzo
Okada, Mitsutoshi
Fujii, Tomoharu
ELECTRICAL ENGINEERING IN JAPAN, 2015, 190 (01) : 1 - 8
[50] Evaluation of applicability of compact excitation light source to detection of thermally grown oxide layer in thermal barrier coating for gas turbines
Fukuchi, Tetsuo
Eto, Shuzo
Okada, Mitsutoshi
Fujii, Tomoharu
IEEJ Transactions on Fundamentals and Materials, 2013, 133 (11) : 565 - 571

← 1 2 3 4 5 →