JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
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IF 5.7
Liang Zhou,Jianbao Hu,Yunhui Zhang,Min Tan,Chunjing Liao,Han Luo,Yanmei Kan,Xiangyu Zhang,Jinshan Yang,Xiaowu Chen,Shaoming Dong
The phase transition of thermally grown oxide (TGO) has been proven to be an important factor affecting the durability of EBCs. Yb 2 O 3 and Yb 2 SiO 5 can react with silica to form silicate, which can reduce the TGO thickness and extend the lifetime of EBCs. In this paper, the Yb 2 SiO 5 -Yb 2 O 3 -Si-SiC ceramic was prepared by tape casting combined with silicon reactive melt infiltration. The oxidation properties of the ceramic were evaluated at 1200–1400 °C. With the increase in temperature, the content of SiO 2 in the oxide layer decreased and the content of Yb 2 Si 2 O 7 increased. A dense and continuous Yb 2 Si 2 O 7 layer was formed at 1400 °C. Yb 2 Si 2 O 7 is formed at the edge of Yb 2 SiO 5 , then Yb 3+ diffuses outwards, Si 4+ diffuses inwards and gradually forms Yb 2 Si 2 O 7 from the outside to the inside.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
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IF 3.83
Haitang Yang,Yanping Yang,Xueqiang Cao,Xiaozhong Huang,Yang Li
A Yb 2 SiO 5 /mullite/Si tri-layer environmental-barrier-coating (EBC) were coated on SiC f /SiC substrates via Air Plasma Spraying (APS). The thermal cycle tests (TCT) were conducted under thermal corrosive condition of vapor-oxygen (50 vol% H 2 O and 50 vol% O 2 ) with thermal shock from 1200 °C to 200 °C. Microstructures, weight loss and bonding strength of the samples were systemically investigated after 101, 396, 606 and 700 TCT cycles respectively. The results show that the corner of the tri-layer coating peel off from the sample with weight loss of 1.3% after 700 TCT cycles. The bonding strength between substrate and tri-layer coatings gradually decreases to 6.79 MPa (approximately 55.2% of virgin specimens) after 700 cycles due to thermal shock induced cracks distributed horizontally within Si layers and between Si layer and outer layers.
研究领域:
材料科学
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航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
·
IF 5.8
Liang Zhou,Jianbao Hu,Yunhui Zhang,Le Gao,Wang Yuan,Han Luo,Yanmei Kan,Xiangyu Zhang,Jinshan Yang,Bin Wu,Xiaowu Chen,Shaoming Dong
To reduce the influence of TGO on EBCs performance, the Yb 2 SiO 5 -Yb 2 O 3 -Si-SiC ceramic was prepared by tape casting and reactive melt infiltration in this paper. During high-temperature water vapor corrosion, the ceramic formed a unique layered oxide layer structure to protect the material. On one hand, TGO is consumed by the reaction of Yb 2 O 3 and Yb 2 SiO 5 with SiO 2 ; On the other, the structure makes no TGO layer between the oxidized and unoxidized regions, which means that even if the TGO layer is stripped, the material still has a dense Yb 2 Si 2 O 7 and Yb 2 SiO 5 mixed layer as a protective barrier.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2026
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IF 6.9
Xincheng Hua,Yixin Xiao,Haizhong Zheng,Peifeng Zhou,Guifa Li,Yongxiang Geng,Lingfeng Li
Yb 2 SiO 5 ceramics, serving as a new-generation material for environmental barrier coatings (EBCs) on the hot-end components of aero-engines, encounter challenges of high-temperature infiltration and corrosion from CaO-MgO-Al 2 O 3 -SiO 2 (CMAS) melts during operation. In this study, femtosecond laser micro-nano processing technology was used to construct periodic bulk structures and conical structures on the surface of Yb 2 SiO 5 . The design of both structures can significantly increase the surface roughness. Among them, after the conical structure was modified by femtosecond laser technology, the proportion of non-polar C C bonds on the surface increased from 69% to 75%. Benefiting from the combined effect of the microstructure and special chemical groups, the surface of the periodic conical structure achieves hydrophobicity, with a static contact angle of 135.2°. At high temperatures, the initial contact angle of the CMAS melt on the conical structure is 83°, which is close to the Cassie-Baxter state, and the stable contact angle is 28°, which is 2.3 times that of the original surface (12°). In addition, after 6 h of CMAS corrosion at 1250 °C, the conical structure still showed clear contours and skeletons, which also proves that the preparation of periodic microstructures by femtosecond laser technology can improve the CMAS resistance to wetting and corrosion performance. The results of this study provide valuable insights and a basis for the research on the resistance of Yb 2 SiO 5 coatings to high-temperature adhesion and corrosion of CMAS melts.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sisi Shang,Jie Wang,Zihan Wang,Zihao Song,Man Yuan,Qi You,Longhui Ge,Jian Yang,Sheng Cui
To investigate the potential of rare earth oxide structural ceramics for high-temperature insulation applications, we introduced aerogel structures into Yb 2 SiO 5 ceramics. In this study, the pure Yb 2 SiO 5 ceramic aerogels were successfully prepared by calcination using formamide as a gelling agent, the sol-gel method, and the CO 2 supercritical drying method. The results indicate that the Yb 2 SiO 5 ceramic aerogel exhibits exceptional structural and phase stability at a temperature of 1400 °C. In addition, we have developed Yb 2 SiO 5 ceramic aerogel composites reinforced with aluminosilicate fiber cotton, which exhibit low density (228.77 kg m −3 ) and low thermal conductivity (0.038 W m −1 K −1 at 25 °C, 0.102 W m −1 K −1 at 1000 °C). The back temperature of the 10 mm thick composites is only 285 °C after exposure to a butane blowtorch flame at 1300 °C for 600 s. This demonstrates its excellent high-temperature insulation performance. This work can provide a basis for further design and preparation of oxide ceramic high-temperature thermal protection materials with controllable morphology and properties.
研究领域:
材料科学
·
高温材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）