Wenyuan Ma , Yubo Luo , Zheng Ma , Chengjun Li , Yongxin Qian , Wang Li , Tianshun Xiong , Zheng Wang , Xin Li , Qinghui Jiang , Guanchun Wang , Junyou Yang
{"title":"La2Zr2O7 based high entropy ceramic with a low thermal conductivity and enhanced CMAS corrosion resistance","authors":"Wenyuan Ma , Yubo Luo , Zheng Ma , Chengjun Li , Yongxin Qian , Wang Li , Tianshun Xiong , Zheng Wang , Xin Li , Qinghui Jiang , Guanchun Wang , Junyou Yang","doi":"10.1016/j.ceramint.2023.06.215","DOIUrl":null,"url":null,"abstract":"<div><p>Herein, five new La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> based high-entropy ceramic materials, such as (La<sub>0.2</sub>Ce<sub>0.2</sub>Gd<sub>0.2</sub>Y<sub>0.2</sub>Er<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, (La<sub>0.2</sub>Ce<sub>0.2</sub>Gd<sub>0.2</sub>Er<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, (La<sub>0.2</sub>Gd<sub>0.2</sub>Y<sub>0.2</sub>Er<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, (La<sub>0.2</sub>Ce<sub>0.2</sub>Y<sub>0.2</sub>Er<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>, (La<sub>0.2</sub>Ce<sub>0.2</sub>Gd<sub>0.2</sub>Y<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>), were synthesized using a sol-gel and high-temperature sintering (1000 °C) method. The spark plasma sintered (SPS) (La<sub>0.2</sub>Ce<sub>0.2</sub>Gd<sub>0.2</sub>Er<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub><span> pellet shows a low thermal conductivity of 1.33 W m</span><sup>-1</sup> K<sup>-1</sup> at 773 K, and it also exhibits better CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub><span> corrosion resistance than that of Y</span><sub>2</sub>O<sub>3</sub> stabilized ZrO<sub>2</sub>. It shows that (La<sub>0.2</sub>Ce<sub>0.2</sub>Gd<sub>0.2</sub>Er<sub>0.2</sub>Sm<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub><span> has a promising application potential as a thermal barrier coating.</span></p></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"49 18","pages":"Pages 29729-29735"},"PeriodicalIF":5.6000,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884223018011","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 1
Abstract
Herein, five new La2Zr2O7 based high-entropy ceramic materials, such as (La0.2Ce0.2Gd0.2Y0.2Er0.2)2Zr2O7, (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7, (La0.2Gd0.2Y0.2Er0.2Sm0.2)2Zr2O7, (La0.2Ce0.2Y0.2Er0.2Sm0.2)2Zr2O7, (La0.2Ce0.2Gd0.2Y0.2Sm0.2)2Zr2O7), were synthesized using a sol-gel and high-temperature sintering (1000 °C) method. The spark plasma sintered (SPS) (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7 pellet shows a low thermal conductivity of 1.33 W m-1 K-1 at 773 K, and it also exhibits better CaO–MgO–Al2O3–SiO2 corrosion resistance than that of Y2O3 stabilized ZrO2. It shows that (La0.2Ce0.2Gd0.2Er0.2Sm0.2)2Zr2O7 has a promising application potential as a thermal barrier coating.
期刊介绍：
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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