双相高熵陶瓷(La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7的制备与热物理性能
Preparation and Thermophysical Properties of Dual-phase High-Entropy Ceramics (La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7
摘 要
以La2O3、Eu2O3、Gd2O3、Y2O3、Yb2O3和ZrO2粉末为原料,采用高温固相反应法制备(La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7高熵陶瓷,确定了制备工艺,研究了其显微组织、物相组成以及热物理性能,分析其高温热稳定性。结果表明:在1500℃烧结5h炉冷条件下,能得到固溶反应完全的双相高熵陶瓷,其呈现烧绿石/萤石双相共存特征,晶粒尺寸在200~800nm,且元素分布均匀;其800℃下的热导率约为8YSZ陶瓷的50%,热膨胀系数与8YSZ陶瓷相当,并具有良好的高温热稳定性。
高熵设计
双相结构
热导率
热膨胀系数
rare earth zirconate ceramics
high-entropy designing
dual-phase structure
thermal conductivity
thermal expansion coefficient
Abstract
High-Entropy ceramics (La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7 were prepared by high-temperature solid state reaction method with La2O3, Eu2O3, Gd2O3,Y2O3, Yb2O3 and ZrO2 powder as raw materials. The preparation process was determined and the microstructure, phase composition, thermophysical properties of the high-entropy ceramics were studied. The high temperature thermal stability was analyzed. The results show that the dual-phase high-entropy ceramics with complete solid solution were obtained by sintering at 1 500 ℃ for 5h followed under furnace cooling. The high-entropy ceramics presented the dual-phase coexistence characteristics of pyrochlore/fluorite with grain size of 200—800 nm; the element distribution was uniform. The thermal conductivity at 800 ℃ of the high-entropy ceramics was 50% of currently used 8YSZ ceramics, and the thermal expansion coefficient was equivalent to that of 8YSZ ceramics. the high-entropy ceramics also showed excellent high temperature thermal stability.
中图分类号 TG174.4 DOI 10.11973/jxgccl202212012
所属栏目 材料性能及应用
基金项目 广东省基础与应用基础研究基金资助项目(2021A1515010466);海军工程大学研究生创新基金资助项目(HGCXJJ20190060)
收稿日期 2021/11/11
修改稿日期 2022/10/21
网络出版日期
作者单位点击查看
联系人作者曾潮流研究员
备注杨宏波(1990-),男,湖北麻城人,博士研究生
引用该论文: YANG Hongbo,LIN Guangqiang,LI Hongyi,WANG Wenjun,LIU Huijun,WANG Yuansheng,ZENG Chaoliu. Preparation and Thermophysical Properties of Dual-phase High-Entropy Ceramics (La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7[J]. Materials for mechancial engineering, 2022, 46(12): 72～78
杨宏波,林广强,李弘毅,王文俊,刘会军,王源升,曾潮流. 双相高熵陶瓷(La0.2Eu0.2Gd0.2Y0.2Yb0.2)2Zr2O7的制备与热物理性能[J]. 机械工程材料, 2022, 46(12): 72～78
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【4】CAO X Q. Development on new thermal barrier coating materials [J]. Journal of the Chinese Ceramic Society, 2020,48(10):1622-1635.
【5】项建英,陈树海,黄继华,等.稀土锆酸盐热障涂层材料研究进展[J].材料导报,2012,26(1):147-152. XIANG J Y,CHEN S H,HUANG J H,et al.Research progresses of rare-earth zirconate ceramic materials for thermal barrier coatings[J].Materials Review,2012,26(1):147-152.
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【10】WRIGHT A J,WANG Q Y,HUANG C Y,et al.From high-entropy ceramics to compositionally-complex ceramics:A case study of fluorite oxides[J].Journal of the European Ceramic Society,2020,40(5):2120-2129.
【11】CHEN K P,PEI X T,TANG L,et al.A five-component entropy-stabilized fluorite oxide[J].Journal of the European Ceramic Society,2018,38(11):4161-4164.
【12】KINSLER FEDON C, ZHENG Q, HUANG Q, et al. Synthesis, characterization, and single-crystal growth of a high-entropy rare-earth pyrochlore oxide[J]. Physics Reviews of Materials, 2020, 4(10): 1044.
【13】SARKAR A,DJENADIC R,WANG D,et al.Rare earth and transition metal based entropy stabilised perovskite type oxides[J].Journal of the European Ceramic Society,2018,38(5):2318-2327.
【14】DABROWA J,STYGAR M,MIKUȽA A,et al.Synthesis and microstructure of the (Co,Cr,Fe,Mn,Ni)3O4 high entropy oxide characterized by spinel structure[J].Materials Letters,2018,216:32-36.
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【18】REN K,WANG Q K,SHAO G,et al.Multicomponent high-entropy zirconates with comprehensive properties for advanced thermal barrier coating[J].Scripta Materialia,2020,178:382-386.
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【20】赵蒙.掺杂对氧化锆基热障涂层材料热物理性能的影响[D].北京:清华大学,2016:9-12. ZHAO M.Effect of doping on the thermophysical properties of zirconia-based thermal barrier coating materials[D].Beijing:Tsinghua University,2016:9-12.
【21】张丰年,郭猛,苗洋,等.高熵陶瓷(Zr1/7Hf1/7Ce1/7Y2/7La2/7)O2-δ的制备及烧结行为[J].无机材料学报,2021,36(4):372-378. ZHANG F N,GUO M,MIAOY,et al.Preparation and sintering behavior of high-entropy ceramic(Zr1/7Hf1/7Ce1/7Y2/7La2/7)O2-δ[J].Journal of Inorganic Materials,2021,36(4):372-378.
【22】VAISAKHAN THAMPI D S,PRABHAKAR RAO P,RENJU U A.Studies on order-disorder transition,lattice expansion and ionic conductivity in aliovalent cation substituted Sm2Zr2O7System[J].Journal of Solid State Chemistry,2017,255:121-128.
【23】TENG Z,TAN Y Q,ZENG S F,et al.Preparation and phase evolution of high-entropy oxides A2B2O7with multiple elements at A and B sites[J].Journal of the European Ceramic Society,2021,41(6):3614-3620.
【24】ZHANG K B,LI W W,ZENG J J,et al.Preparation of (La0.2Nd0.2Sm0.2Gd0.2Yb0.2)2Zr2O7 high-entropy transparent ceramic using combustion synthesized nanopowder[J].Journal of Alloys and Compounds,2020,817:153328.
【25】SUBRAMANIAN M A,ARAVAMUDAN G,SUBBA RAO G V.Oxide pyrochlores:A review[J].Progress in Solid State Chemistry,1983,15(2):55-143.
【26】汪敏.氧化锆基热障涂层材料的制备、热物理性能及CMAS腐蚀[D].北京:中国工程物理研究院,2018:30. WANG M.Thermophysical properties and CMAS corrosion of zirconia-based thermal barrier coating materials[D]. Mianyang: China Academy of Engineering Physics,2018:30.
【27】曾建军,张魁宝,陈代梦,等.真空烧结制备(La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7高熵透明陶瓷[J].无机材料学报,2021,36(4):418-424. ZENG J J,ZHANG K B,CHEN D M,et al.Preparation of (La0.2Nd0.2Sm0.2Gd0.2Er0.2)2Zr2O7 high-entropy transparent ceramics by vacuum sintering[J].Journal of Inorganic Materials,2021,36(4):418-424.
【28】夏校良,刘占国,欧阳家虎,等.稀土离子半径对稀土锆酸盐的组织结构和电学性能的影响[J].稀有金属材料与工程,2016,45(8):2003-2008. XIA X L,LIU Z G,OUYANG J H,et al.Effect of rare-earth ionic radius on microstructure and electrical property of rare-earth zirconate ceramics[J].Rare Metal Materials and Engineering,2016,45(8):2003-2008.
【29】刘占国.A2Zr2O7型稀土锆酸盐材料的组织结构与物理性能研究[D].哈尔滨:哈尔滨工业大学,2009:64-65. LIU Z G.Study on microstructure and physical properties of A2Zr2O7-type rare-earth zirconates[D].Harbin:Harbin Institute of Technology,2009:64-65.
【30】桑玮玮,张红松,陈华辉,等.(Sm0.2Gd0.2Dy0.2Y0.2Yb0.2)3TaO7高熵陶瓷的制备及热物理性能[J].无机材料学报,2021,36(4):405-410. SANG W W,ZHANG H S,CHEN H H,et al.Preparation and thermophysical properties of(Sm0.2Gd0.2Dy0.2Y0.2Yb0.2)3TaO7 high-entropy ceramic[J].Journal of Inorganic Materials,2021,36(4):405-410.
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