| On the resistance of rare earth oxide-doped YSZ to high temperature volcanic ash attack | |
Xia J; Yang L; Wu RT; Zhou YC; Zhang L; Yin BB; Wei YG(魏悦广) ; 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 | 307Pages:534-541 |
| ISSN | 0257-8972 |
| Abstract | Thermal barrier coatings (TBCs), such as 7-8 wt.% yttria stabilized zirconia (YSZ), are widely used to reduce the temperature of coated materials. However, when a turbine operates in a harsh environment, for example a volcanic ash attack, sand and ash particles ingested by the engine could be deposited on the TBC surfaces as molten calcium-magnesium-alumino-silicate (CMAS). CMAS melts and penetrates into TBCs at high temperatures, which causes a loss of strain tolerance and results in the premature failure of the top coat. It is recognized that the formation of CMAS is inevitable due to exposing the turbine to sand and ash; therefore, CMAS mitigation solutions are among the top challenges for materials scientists. To some extent, CMAS is the biggest weakness of the traditional 7-8YSZ TBC material. The thermochemical interactions between YSZ and real volcanic ash are investigated in this paper as a means to alleviate the volcanic ash attack by understanding the underlying mechanisms. 7YSZ, 0.5Gd-8YSZ and 3Er-7YSZ powders and free-standing plates were prepared, respectively. The effect of the volcanic ash on the three different samples was investigated using an X-ray diffraction, scanning electron microscopy, a scanning transmission electron microscopy, and a differential scanning calorimetry. The phase transformations and reaction of TBCs materials subjected to a volcanic ash attack were examined and the volcanic ash degradation and mitigation mechanisms were discussed. It was found that rare earth-doped YSZ samples suffered less damage from the volcanic ash attack than the standard 7YSZ. The results demonstrate that rare earth-doped YSZ may be effectively utilized to mitigate a volcanic ash attack. (C) 2016 Published by Elsevier B.V. |
| Keyword | Thermal Barrier Coatings Rare Earth-doped Ysz Volcanic Ash Cmas |
| DOI | 10.1016/j.surfcoat.2016.09.033 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000390622200064 |
| WOS Keyword | Thermal barrier coatings ; Rare earth-doped YSZ ; Volcanic ash ; CMAS |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Coatings & Films ; Physics, Applied |
| Funding Organization | National Natural Science Foundation of China [51590891, 11272275, 11472237, 11432014] |
| Department | LNM新型材料及结构的多尺度力学 |
| Classification | 二类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/59975 |
| 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 | Xia J,Yang L,Wu RT,et al. On the resistance of rare earth oxide-doped YSZ to high temperature volcanic ash attack[J]. SURFACE & COATINGS TECHNOLOGY,2016,307:534-541. |
| APA | Xia J.,Yang L.,Wu RT.,Zhou YC.,Zhang L.,...&Zhou, YC .(2016).On the resistance of rare earth oxide-doped YSZ to high temperature volcanic ash attack.SURFACE & COATINGS TECHNOLOGY,307,534-541. |
| MLA | Xia J,et al."On the resistance of rare earth oxide-doped YSZ to high temperature volcanic ash attack".SURFACE & COATINGS TECHNOLOGY 307(2016):534-541. |
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| IMCAS-J2016-351.pdf（1543KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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