Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9

doi:10.1016/j.jeurceramsoc.2022.03.005

CORC > 金属研究所 > 中国科学院金属研究所

	Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9
	Liu, Hanwen 1,2; Liu, Ling 1,3,4; Xiang, Huimin 2; Dai, Fu-Zhi 2; Wang, Xiaohui 5; Huang, Muzhang 6; Wan, Chunlei ; Ma, Zhuang 1,3,4; Liu, Yanbo 1,3,4; Li, Hezhang 1
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2022-07-01
卷号	42 期号:8 页码:3559-3569
关键词	Rare-earth tantalate Phase transformation Thermal barrier coatings (TBCs) High-entropy ceramics (HECs) Integrated synthesis and sintering
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2022.03.005
通讯作者	Liu, Ling(richard@bit.edu.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn)
英文摘要	To explore the mechanism of phase transformation, YTa3O9 was prepared by an integrated one-step synthesis and sintering method at 1500 degrees C using Y2O3 and Ta2O5 powders as starting materials. High-temperature XRD pat-terns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa3O9 through the bond length and angle changes at 300-400 degrees C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9 (HE RETa3O9) was designed and synthesized at 1550 degrees C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa3O9, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa3O9 exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m.K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa3O9 promising as a new thermal barrier coating material.
资助项目	National Natural Science Foundation of China[51772027] ; National Natural Science Foundation of China[51972089]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000790250100004
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172476]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Ling; Zhou, Yanchun
作者单位	1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 2.Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China 3.Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China 4.Beijing Inst Technol, Chongqing Innovat Ctr, Chongqing 401120, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hanwen,Liu, Ling,Xiang, Huimin,et al. Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2022,42(8):3559-3569.
APA	Liu, Hanwen.,Liu, Ling.,Xiang, Huimin.,Dai, Fu-Zhi.,Wang, Xiaohui.,...&Zhou, Yanchun.(2022).Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,42(8),3559-3569.
MLA	Liu, Hanwen,et al."Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2) Ta3O9".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 42.8(2022):3559-3569.