In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C
Rare earth (RE) silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine engines. However, calcium–magnesium–alumina–silicate (CMAS) corrosion becomes much more serious and is the critical challenge for RE silicate with the increasing operating t...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-12-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2023.9220822 |
| _version_ | 1797354848990003200 |
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| author | Zhilin Tian Keyu Ming Liya Zheng Zhilin Chen Fan Zhou Peng Liu Zihao Qiu Donghui Wei Bin Li Jingyang Wang |
| author_facet | Zhilin Tian Keyu Ming Liya Zheng Zhilin Chen Fan Zhou Peng Liu Zihao Qiu Donghui Wei Bin Li Jingyang Wang |
| author_sort | Zhilin Tian |
| collection | DOAJ |
| description | Rare earth (RE) silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine engines. However, calcium–magnesium–alumina–silicate (CMAS) corrosion becomes much more serious and is the critical challenge for RE silicate with the increasing operating temperature. Therefore, it is quite urgent to clarify the mechanism of high-temperature CMAS-induced degradation of RE silicate at relatively high temperatures. Herein, the interaction between RE2SiO5 and CMAS up to 1500 ℃ was investigated by a novel high-temperature in-situ observation method. High temperature promotes the growth of the main reaction product (Ca2RE8(SiO4)6O2) fast along the [001] direction, and the precipitation of short and horizontally distributed Ca2RE8(SiO4)6O2 grains was accelerated during the cooling process. The increased temperature increases the solubility of RE elements, decreases the viscosity of CMAS, and thus elevates the corrosion reaction rate, making RE2SiO5 fast interaction with CMAS and less affected by RE element species. |
| first_indexed | 2024-03-08T13:55:45Z |
| format | Article |
| id | doaj.art-0056d8456c784e4081035b5afd0a4c87 |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-08T13:55:45Z |
| publishDate | 2023-12-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-0056d8456c784e4081035b5afd0a4c872024-01-15T14:28:51ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082023-12-0112122315233010.26599/JAC.2023.9220822In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °CZhilin Tian0Keyu Ming1Liya Zheng2Zhilin Chen3Fan Zhou4Peng Liu5Zihao Qiu6Donghui Wei7Bin Li8Jingyang Wang9School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaRare earth (RE) silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine engines. However, calcium–magnesium–alumina–silicate (CMAS) corrosion becomes much more serious and is the critical challenge for RE silicate with the increasing operating temperature. Therefore, it is quite urgent to clarify the mechanism of high-temperature CMAS-induced degradation of RE silicate at relatively high temperatures. Herein, the interaction between RE2SiO5 and CMAS up to 1500 ℃ was investigated by a novel high-temperature in-situ observation method. High temperature promotes the growth of the main reaction product (Ca2RE8(SiO4)6O2) fast along the [001] direction, and the precipitation of short and horizontally distributed Ca2RE8(SiO4)6O2 grains was accelerated during the cooling process. The increased temperature increases the solubility of RE elements, decreases the viscosity of CMAS, and thus elevates the corrosion reaction rate, making RE2SiO5 fast interaction with CMAS and less affected by RE element species.https://www.sciopen.com/article/10.26599/JAC.2023.9220822calcium–magnesium–alumina–silicate (cmas) corrosionenvironmental barrier coatingrare earth (re) silicatehigh temperature |
| spellingShingle | Zhilin Tian Keyu Ming Liya Zheng Zhilin Chen Fan Zhou Peng Liu Zihao Qiu Donghui Wei Bin Li Jingyang Wang In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C Journal of Advanced Ceramics calcium–magnesium–alumina–silicate (cmas) corrosion environmental barrier coating rare earth (re) silicate high temperature |
| title | In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C |
| title_full | In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C |
| title_fullStr | In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C |
| title_full_unstemmed | In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C |
| title_short | In-situ observation and mechanism of calcium–magnesium–alumina–silicate (CMAS) melts-induced degradation of RE2SiO5 (RE = Tb, Dy, Ho, Y, Er, Tm, and Yb) ceramics at 1500 °C |
| title_sort | in situ observation and mechanism of calcium magnesium alumina silicate cmas melts induced degradation of re2sio5 re tb dy ho y er tm and yb ceramics at 1500 °c |
| topic | calcium–magnesium–alumina–silicate (cmas) corrosion environmental barrier coating rare earth (re) silicate high temperature |
| url | https://www.sciopen.com/article/10.26599/JAC.2023.9220822 |
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