| Acoustic emission monitoring and damage mode discrimination of APS thermal barrier coatings under high temperature CMAS corrosion | |
Yang L; Yang TT; Zhou YC; Wei YG(魏悦广) ; Wu RT; Wang NG; Yang, L; Zhou, YC (reprint author), Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Key Film Mat & Applicat Equipment Hunan P, Xiangtan 411105, Hunan, Peoples R China.
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| Source Publication | SURFACE & COATINGS TECHNOLOGY
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| 2016 | |
| Volume | 304Pages:272-282 |
| ISSN | 0257-8972 |
| Abstract | Molten calcium-magnesium-alumino-silicate (CMAS) corrosion is the most dangerous failure mode for thermal barrier coatings (TBCs). The real-time monitoring and mode discrimination of the corrosion failure process are desirable to understand the corrosion failure mechanism of TBCs. In this paper, the failure mechanism of the TBCs subjected to molten CMAS attack is investigated with acoustic emission (AE). Based on the number and amplitude, and compared to the substrate and the TBCs without CMAS, more serious damage is found to occur in the TBCs attacked by the molten CMAS. Possible failure modes are discriminated by wavelet analysis, and the results indicate that there are four distinct frequency bands corresponding to surface vertical cracks, sliding interface cracks, opening interface cracks, and substrate deformation in the TBCs suffered high temperature molten CMAS corrosion. In fact, the frequency band of sliding interface crack is associated with two crack types, including the crack at the YSZ/BC interface and the parallel crack in the ceramic coating induced by the compressive stress. These two cracks dominate the whole failure process, and ultimately result in the spallation of coatings. (C) 2016 Elsevier B.V. All rights reserved. |
| Keyword | Thermal Barrier Coatings Acoustic Emission Wavelet Packet Transform Cmas Corrosion Damage Mode |
| DOI | 10.1016/j.surfcoat.2016.06.080 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000384775900032 |
| WOS Keyword | Thermal barrier coatings ; Acoustic emission ; Wavelet packet transform ; CMAS corrosion ; Damage mode |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Coatings & Films ; Physics, Applied |
| Funding Organization | This work was supported by the National Natural Science Foundation of China (grant nos. 51590891, 11272275, 11472237, and 11432014). |
| Department | LNM新型材料及结构的多尺度力学 |
| Classification | 二类 |
| Ranking | False |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/59708 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Yang, L; Zhou, YC (reprint author), Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Key Film Mat & Applicat Equipment Hunan P, Xiangtan 411105, Hunan, Peoples R China. |
| Recommended Citation GB/T 7714 | Yang L,Yang TT,Zhou YC,et al. Acoustic emission monitoring and damage mode discrimination of APS thermal barrier coatings under high temperature CMAS corrosion[J]. SURFACE & COATINGS TECHNOLOGY,2016,304:272-282. |
| APA | Yang L.,Yang TT.,Zhou YC.,魏悦广.,Wu RT.,...&Zhou, YC .(2016).Acoustic emission monitoring and damage mode discrimination of APS thermal barrier coatings under high temperature CMAS corrosion.SURFACE & COATINGS TECHNOLOGY,304,272-282. |
| MLA | Yang L,et al."Acoustic emission monitoring and damage mode discrimination of APS thermal barrier coatings under high temperature CMAS corrosion".SURFACE & COATINGS TECHNOLOGY 304(2016):272-282. |
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| a2016-187.pdf（2399KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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