铈掺杂Y_(3)Al_(5)O_(12)热障涂层陶瓷材料的制备与性能研究  

Preparation and Properties of Cerium Doped Y_(3)Al_(5)O_(12)Thermal Barrier CoatingCeramic Materials

作　　者：王炫力 刘爽[1] 谢敏[1] 王志刚[1] 牟仁德 宋希文[1] Wang Xuanli;Liu Suang;Xie Min;Wang Zhigang;Mu Rende;Song Xiwen(School of Maerials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;AECC Beijing Institute of Aeronautial Materials,Beijing 100095,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]中国航发北京航空材料研究院,北京100095

出　　处：《中国稀土学报》2023年第6期1119-1125,I0003,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家科技重大专项项目(J2019-VI-0002-0115);国家自然科学基金青年科学基金项目(52002124);内蒙古自治区自然科学基金(2020LH05028);内蒙古科技大学创新基金项目(2019QDL-B03)资助。

摘　　要：采用高温固相反应合成法制备不同组分的铈掺杂Y_3Al_5O_(12)热障涂层陶瓷材料,利用X射线衍射仪、X射线光电子能谱、扫描电子显微镜、维氏硬度仪和激光导热仪研究Ce掺杂量对陶瓷材料物相组成、微观形貌、硬度和热导率的影响规律。结果表明:当Ce掺杂量x为0.01和0.02时,(Y_(1-x)Ce_x)_(3)Al_(5)O_(12)呈单一YAG相,(Y_(0.99)Ce_(0.01))_(3)Al_(5)O_(12)的硬度最大,约为18.93 GPa;(Y_(0.98)Ce_(0.02))_(3)Al_(5)O_(12)的热导率最低,1000℃时约为1.95W·m^(-1)·K^(-1)。随着Ce掺杂量的增加,材料中出现Ce O_(2)第二相且Ce~(4+)的占比增多,粉体颗粒尺寸增大,陶瓷晶粒尺寸减小,导致(Y_(1-x)Ce_x)_(3)Al_(5)O_(12)陶瓷材料的硬度和热导率均有所下降。Ce doped Y_(3)Al_(5)O_(12)thermal barrier coating ceramic materials with different components were prepared by high temperature solid-state reaction synthesis method.The effects of Ce doping amount on phase composition,microstructure,hardness and thermal conductivity of the ceramic materials were studied by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,a Vickers hardness tester and a laser thermal conductivity tester.The results show that(Y_(1-x)Ce_(x))3Al_(5)O_(12)presents a single YAG phase when the Ce content x equals to 0.01 or 0.02.The hardness of(Y_(0.99)Ce_(0.01))_(3)Al_(5)O_(12)is the highest(~18.93 GPa)and the thermal conductivity of(Y_(0.98)Ce_(0.02))_(3)Al_(5)O_(12)is the lowest(~1.95 W·(m·K)^(-1),1000℃).With the increase of Ce doping amount,the second phase of CeO_(2) appears in the(Y1-xCex)3Al_(5)O_(12)and the proportion of Ce4+ions increases,meanwhile,the particle size of the powders increases and the grain size of the ceramics decreases,thus the hardness and the thermal conductivity of material decrease.

关 键 词：热障涂层 陶瓷层材料 钇铝石榴石 铈掺杂 硬度 热导率 

分 类 号：TQ174.1[化学工程—陶瓷工业]