首页|Mn掺杂对(Y0.4Er0.6)3Al5O12热障涂层材料的微观结构和导热性能的影响

Mn掺杂对(Y0.4Er0.6)3Al5O12热障涂层材料的微观结构和导热性能的影响

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采用固相合成法制备(Y04Er0.6)3(Al1-yMny)5O12(y=0,0.02,0.04,0.06,0.08,0.1)陶瓷材料,使用X射线衍射仪及Rietveld精修、X射线光电子能谱仪、扫描电子显微镜、X射线能谱仪、透射电子显微镜和激光导热仪等手段对其表征,研究了Mn掺杂对其微观结构和导热性能的影响.结果表明:(Y0.4Er0.6)3(Al1-yMny)5O12陶瓷材料均为单一的YAG相,随着Mn掺杂量的提高晶格常数和晶胞体积先减小后增大,Mn2+逐渐占据晶胞中的Al3+位置但是Y3A15O12的晶体结构不变;Mn掺杂使(Y0.4Er0.6)3(Al1-yMny)5O12陶瓷材料的热导率显著降低,y=0.06的陶瓷材料热导率最低,在1100 ℃热导率约为1.38W/(m·K),比纯YAG陶瓷的热导率(2.1 W/(m·K))降低了约34.6％.
Effect of Mn Doping on Microstructure and Thermal Conductivity of(Y0.4Er0.6)3Al5O12 Ceramics Material for Thermal Barrier Coating
Ceramic materials(Y0.4Er0.6)3(Al1_yMny)5O12(y=0,0.02,0.04,0.06,0.08,0.1)were pre-pared by solid phase synthesis method,and their microstructure and thermal conductivity were studied by X-ray diffractometer and Rietveld refinement method,X-ray photoelectron spectroscopy,scanning electron microscopy,X-ray energy spectroscopy,transmission electron microscopy,laser thermal conduc-tivity tester.The results show that the ceramic materials of(Y0.4Er0.6)3(Al1-yMny)5O12 are all single YAG phase,with the increase of Mn doping,the lattice constant and cell volume decrease and then increase,Mn2+gradually occupies the position of Al3+in the cell,keeping the crystal structure of Y3Al5O12 un-changed;the thermal conductivity of the ceramic material(Y04Er0.6)3(Al1-yMny)5O12 is significantly reduced,with the lowest thermal conductivity at Mn doping y=0.06,which is about 1.38 W/(m·K)at 1100℃,and reduced by about 34.6% compared to that of the pure ceramic material YAG(2.1 W/(m·K)).

inorganic non-metallic materialsthermal barrier coatingyttrium aluminum garnetdouble-site dopingmicrostructurethermal conductivity

王俊、王炫力、刘爽、宋蕊、宋希文

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内蒙古科技大学材料科学与工程学院 包头 014010

无机非金属材料 热障涂层 钇铝石榴石 双位掺杂 微观结构 热导率

国家自然科学基金内蒙古自治区直属高校基本科研业务费项目内蒙古科技大学创新基金项目

523720622023QNJS0162019QDL-B03

2024

10.11901/1005.3093.2023.415

材料研究学报
国家自然科学基金委员会 中国材料研究学会

材料研究学报

CSTPCD北大核心
影响因子：0.605
ISSN：1005-3093
年,卷(期)：2024.38(6)