In-situ synthesis of gadolinium niobate quasi-binary composites with balanced mechanical and thermal properties for thermal barrier coatings
In-situ synthesis of gadolinium niobate quasi-binary composites with balanced mechanical and thermal properties for thermal barrier coatings
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原位合成具有平衡机械和热性能的铌酸钆准二元复合材料用于热障涂层
DOI:
10.1007/s40145-022-0622-2
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发表时间:
2022-08
影响因子:
16.9
通讯作者:
Chunlei Wan
中科院分区:
文献类型:
--
作者:
Yi Han;Peng-an Zong;Muzhang Huang;Zesheng Yang;Yingjie Feng;Wei Pan;Peng Zhang;Chunlei Wan
Abstract Yttria-stabilized zirconia (YSZ) has been used as a thermal barrier coating (TBC) material in gas turbines for several decades. Although continuous efforts have been made to develop novel TBC materials that can work at a higher temperature, no single material other than YSZ has all the desired attributes for the TBCs. In this paper, we report the in-situ synthesis of quasi-binary GdNbO 4 /Gd 3 NbO 7 composites based on the simple Gd 2 O 3 -Nb 2 O 5 binary phase diagram. The fracture toughness of these quasi-binary composites is remarkably enhanced compared with the value predicted by the rule of mixtures because the ferroelastic domain switching is more activated due to the residual stress in the quasi-binary composites, which triggers more crack defections due to the enlarged process zone. Additionally, the Gd 3 NbO 7 phase provides a low thermal conductivity due to the substantial chemical inhomogeneity, which diffuses phonons. Gd 3 NbO 7 /GdNbO 4 exhibits a balanced thermal conductivity of 1.6 W/(m·K) at 1073 K and a toughness value of 2.76 MPa·m 0.5 , and these values are among the best comprehensive properties that have been obtained for new TBC materials. The work demonstrates a feasible approach of designing a new TBC material with balanced properties and can be easily fabricated.
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影响因子:
3.7
作者:
C. Wan;W. Pan;Q. Xu;Y. -. Qin;J. D. Wang;Z. Qu;M. Fang
通讯作者:
C. Wan;W. Pan;Q. Xu;Y. -. Qin;J. D. Wang;Z. Qu;M. Fang
影响因子:
5.7
作者:
Xiaoyu Xie;Hongbo Guo;S. Gong;Huibin Xu
通讯作者:
Xiaoyu Xie;Hongbo Guo;S. Gong;Huibin Xu
影响因子:
3.9
作者:
Wen Ma;D. Mack;R. Vaßen;D. Stöver
通讯作者:
Wen Ma;D. Mack;R. Vaßen;D. Stöver
影响因子:
3.1
作者:
R. Vaßen;A. Stuke;D. Stöver
通讯作者:
R. Vaßen;A. Stuke;D. Stöver
影响因子:
5.2
作者:
Peng Zhang;K. Choy
通讯作者:
Peng Zhang;K. Choy