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Medium-entropy (Me,Ti)(0.1)(Zr,Hf,Ce)(0.9)O-2 (Me = Y and Ta): Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking

文献类型：期刊论文

作者Qiu, Shuaihang2,3,4; Xiang, Huimin2; Dai, Fu-Zhi2; Wang, Hailong4; Huang, Muzhang5; Wan, Chunlei5; Meng, Qing1; Li, Jiangtao1; Wang, Xiaohui6; Zhou, Yanchun2
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2022-10-01
卷号123页码:144-153
ISSN号1005-0302
关键词Medium-entropy ceramics Thermal barrier coatings Thermal radiation shielding CMAS resistance Infrared absorbance
DOI10.1016/j.jmst.2022.01.019
通讯作者Wang, Hailong(119whl@zzu.edu.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn)
英文摘要With continuous enhancement of gas-turbine inlet temperature and rapid increase of radiant heat transfer, thermal barrier coating (TBC) materials with a combination of low thermal conductivity and good high-temperature thermal radiation shielding performance play vital roles in ensuring the durability of metallic blades. However, yttria-stabilized zirconia (YSZ), as the state-of-the-art TBC and current industry standard, is unable to meet such demands since it is almost translucent to high-temperature thermal radiation. Besides, poor corrosion resistance of YSZ to molten calcia-magnesia-alumina-silicates (CMAS) also impedes its application in sand, dust, or volcanic ash laden environments. In order to improve the high-temperature thermal radiation shielding performance and CMAS resistance of YSZ and further reduce its thermal conductivity, two medium-entropy (ME) oxide ceramics, ME (Y, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 and ME (Ta, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2, were designed and prepared by pressureless sintering of binary powder compacts in this work. ME (Y, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 presents cubic structure but a trace amount of secondary phase, while ME (Ta, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 displays a combination of tetragonal phase (81.6 wt.%) and cubic phase (18.4 wt.%). Both ME (Y, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 and ME (Ta, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 possess better high-temperature thermal radiation shielding performance than YSZ. Especially, the high-temperature thermal radiation shielding performance of ME (Ta, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 is superior to that of ME (Y, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 due to its narrower band gap and correspondingly higher infrared absorbance (above 0.7) at the waveband of 1 to 5 mu m. The two ME oxides also display significantly lower thermal conductivity than YSZ and close thermal expansion coefficients (TECs) to YSZ and Ni-based superalloys. In addition, the two ME oxides possess excellent CMAS resistance. After attack by molten CMAS at 1250 degrees C for 4 h, merely similar to 2 mu m thick penetration layer has been formed and the structure below the penetration layer is still intact. These results demonstrate that ME (Me, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2 (Me = Y and Ta), especially ME (Ta, Ti)(0.1)(Zr, Hf, Ce)(0.9)O-2, are promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目National Natural Science Foundation of China[51772275] ; National Natural Science Foundation of China[51972089] ; Distinguished Young Foundation of Henan Province[202300410355]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者JOURNAL MATER SCI TECHNOL
WOS记录号WOS:000788132100005
资助机构National Natural Science Foundation of China ; Distinguished Young Foundation of Henan Province
源URL[http://ir.imr.ac.cn/handle/321006/172584]  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, Hailong; Zhou, Yanchun
作者单位1.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
2.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China
3.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
4.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
5.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
6.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Qiu, Shuaihang,Xiang, Huimin,Dai, Fu-Zhi,et al. Medium-entropy (Me,Ti)(0.1)(Zr,Hf,Ce)(0.9)O-2 (Me = Y and Ta): Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,123:144-153.
APA Qiu, Shuaihang.,Xiang, Huimin.,Dai, Fu-Zhi.,Wang, Hailong.,Huang, Muzhang.,...&Zhou, Yanchun.(2022).Medium-entropy (Me,Ti)(0.1)(Zr,Hf,Ce)(0.9)O-2 (Me = Y and Ta): Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,123,144-153.
MLA Qiu, Shuaihang,et al."Medium-entropy (Me,Ti)(0.1)(Zr,Hf,Ce)(0.9)O-2 (Me = Y and Ta): Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 123(2022):144-153.

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来源：金属研究所

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