(Y0.2Gd0.2Dy0.2La0.2Sm0.2)TaO4高熵陶瓷材料的结构、性能及抗侵蚀行为研究

doi:10.3969/j.issn.1001-1935.2023.05.009

耐火材料 ›› 2023, Vol. 57 ›› Issue (5): 417-422.DOI: 10.3969/j.issn.1001-1935.2023.05.009

(Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄高熵陶瓷材料的结构、性能及抗侵蚀行为研究

王瑞达^1,2), 赵世贤¹⁾, 陈留刚²⁾, 司瑶晨¹⁾, 李凌锋¹⁾, 李红霞¹⁾, 刘广华³⁾

1)中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室河南洛阳 471039
2)郑州大学材料科学与工程学院河南省高温功能材料重点实验室河南郑州 450052
3)中国联合重型燃气轮机技术有限公司北京 100045

收稿日期:2023-07-17 出版日期:2023-10-15 发布日期:2023-10-26
通讯作者: 赵世贤,男,1981年生,博士,正高级工程师。E-mail:zhaosx@lirrc.com
作者简介:王瑞达:男,1998年生,硕士研究生。E-mail:1461586234@qq.com
基金资助:
河南省中央引导地方科技发展资金项目(Z20221343008)。

Structure, properties and corrosion resistance of high entropy (Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄ ceramic materials

Wang Ruida, Zhao Shixian, Chen Liugang, Si Yaochen, Li Lingfeng, Li Hongxia, Liu Guanghua

First author's address: State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China

Received:2023-07-17 Online:2023-10-15 Published:2023-10-26

摘要/Abstract

摘要： 为满足新一代航空发动机对新型热障涂层材料的迫切需求,以高纯氧化物(Y₂O₃、Gd₂O₃、Dy₂O₃、Sm₂O₃、La₂O₃、Ta₂O₅)为原料,按化学计量比配料,经1 200~1 750 ℃保温5 h固相反应,制备了高熵稀土钽酸盐(Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄材料,简称为(5RE_0.2)TaO₄材料。研究了材料的物相组成、显微结构、热学性能、力学性能和抗CaO-MgO-Al₂O₃-SiO₂(CMAS)侵蚀行为。结果表明:1)(5RE_0.2)TaO₄陶瓷材料为单斜结构,存在明显铁弹畴;2)该材料经1 750 ℃烧后具有极低的热导率(1.65 W·m^-1·K^-1,600 ℃)和较高的热膨胀系数(10.2×10^-6 K^-1,1 200 ℃);3)由于独特的铁弹增韧效应,经1 750 ℃烧后(5RE_0.2)TaO₄材料的断裂韧性达到2.4 MPa·m^1/2;4)(5RE_0.2)TaO₄与CMAS熔体作用后形成反应层,表现出了优异的抗侵蚀性能。

关键词: 热障涂层, 稀土钽酸盐, 高熵陶瓷, 抗CMAS侵蚀

Abstract: In order to meet the urgent demand of new thermal barrier coating materials for a new generation of aero-engines,a high entropy rare earth tantalate (Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄ material,abbreviated as (5RE_0.2)TaO₄,was developed using high-purity oxides (Y₂O₃,Gd₂O₃,Dy₂O₃,Sm₂O₃,La₂O₃,Ta₂O₅) as raw materials according to the stoichiometric ratio,and insulating at 1 200-1 750 ℃ for 5 h for a solid phase reaction. The phase composition,microstructure,thermal properties,mechanical properties,and CMAS (CaO-MgO-Al₂O₃-SiO₂) corrosion resistance of the material were studied.The results show that:(1)the (5RE_0.2)TaO₄ ceramic material has a monoclinic structure with obvious ferroelastic domain;(2)the material fired at 1 750 ℃ exhibits extremely low thermal conductivity (1.65 W·m^-1·K^-1,600 ℃) and high thermal expansion coefficient (10.2×10^-6K^-1,1 200 ℃);(3)due to the unique ferroelastic toughening effect,the fracture toughness of the (5RE_0.2)TaO₄ material fired at 1 750 ℃ reaches 2.4 MPa·m^1/2;(4)(5RE_0.2)TaO₄ reacts with CMAS melt forming a reaction layer,showing excellent corrosion resistance.

Key words: thermal barrier coating, rare earth tantalate, high entropy ceramics, CMAS corrosion resistance

中图分类号:

TK265

王瑞达, 赵世贤, 陈留刚, 司瑶晨, 李凌锋, 李红霞, 刘广华. (Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄高熵陶瓷材料的结构、性能及抗侵蚀行为研究[J]. 耐火材料, 2023, 57(5): 417-422.

Wang Ruida, Zhao Shixian, Chen Liugang, Si Yaochen, Li Lingfeng, Li Hongxia, Liu Guanghua. Structure, properties and corrosion resistance of high entropy (Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄ ceramic materials[J]. Refractories, 2023, 57(5): 417-422.

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(Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄高熵陶瓷材料的结构、性能及抗侵蚀行为研究

Structure, properties and corrosion resistance of high entropy (Y_0.2Gd_0.2Dy_0.2La_0.2Sm_0.2)TaO₄ ceramic materials

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