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
Effect of Mn Doping on Microstructure and Thermal Conductivity of(Y0.4Er0.6)3Al5O12 Ceramics Material for Thermal Barrier Coating
王俊 1王炫力 1刘爽 1宋蕊 1宋希文1
作者信息
- 1. 内蒙古科技大学材料科学与工程学院 包头 014010
- 折叠
摘要
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％.
Abstract
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)).
关键词
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Key words
inorganic non-metallic materials/thermal barrier coating/yttrium aluminum garnet/double-site doping/microstructure/thermal conductivity引用本文复制引用
基金项目
国家自然科学基金(52372062)
内蒙古自治区直属高校基本科研业务费项目(2023QNJS016)
内蒙古科技大学创新基金项目(2019QDL-B03)
出版年
2024
NETL
NSTL
万方数据