稀土氧化物掺杂对Y_(3)Al_(5)O_(12)热障涂层材料热膨胀性能的影响  

Effect of rare earth oxide doping on thermal expansion properties of Y_(3)Al_(5)O_(12)thermal barrier coatings

作　　者：王炫力 刘爽[1,2] 谢敏[1] 王志刚[1] 牟仁德[1,2,3] 宋希文 WANG Xuanli;LIU Shuang;XIE Min;WANG Zhigang;MU Rende;SONG Xiwen(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China;Provincial Ministry Collaborative Innovation Center for Efficient Comprehensive Utilization of Bayan Obo Co-associated Mineral Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China;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]内蒙古科技大学白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,内蒙古包头014010 [3]北京航空材料研究院,北京100095

出　　处：《内蒙古科技大学学报》2023年第1期58-65,共8页Journal of Inner Mongolia University of Science and Technology

基　　金：国家科技重大专项资助项目(J2019-VI-0002);内蒙古自治区自然科学基金资助项目(2020LH05028);内蒙古科技大学创新基金资助项目(2019QDL-B03).

摘　　要：采用固相烧结法制备稀土氧化物(Gd_(2)O_(3),Er_(2)O_(3),Sc_(2)O_(3))掺杂钇铝石榴石(YAG)热障涂层材料.通过X射线衍射仪、扫描电镜和热膨胀仪研究掺杂离子种类、含量和掺杂位置对材料物相组成、微观形貌和热膨胀性能的影响规律.结果显示:阳离子半径小于Y^(3+)的Sc_(2)O_(3)掺杂YAG陶瓷材料热膨胀性能最优.当掺杂量x为0.6时,(Y_(0.4)Sc_(0.6))_(3)Al_(5)O_(12)陶瓷的平均热膨胀系数最大,约为12.34×10^(-6)K^(-1),比纯YAG陶瓷的平均热膨胀系数(~8×10^(-6)K^(-1))提高了约50%.The rare earth oxides(Gd_(2)O_(3),Er_(2)O_(3),Sc_(2)O_(3))doped yttrium aluminum garnet(YAG)thermal barrier coating materials were prepared by solid-phase sintering method.The effects of the type,content and position of doping ions on the phase composition,microstructure and thermal expansion properties of the materials were studied by X-ray diffractometer,scanning electron microscope and thermal dilatometer.The results showed that the thermal expansion performance of Sc_(2)O_(3)doped YAG ceramics with cation radius less than Y^(3+)was the optimum.When doping amount x=0.6,the average thermal expansion coefficient of(Y_(0.4)Sc_(0.6))_(3)Al_(5)O_(12)ceramic was the largest,about 12.34×10^(-6)K^(-1),which is about 50%higher than that of pure YAG ceramic(about 8×10^(-6)K^(-1)).

关 键 词：热障涂层 钇铝石榴石 稀土氧化物 掺杂 热膨胀 

分 类 号：TQ174.1[化学工程—陶瓷工业]