Crystallization mechanism of plasma-sprayed LaMgAl 11 O 19 coating
作者: Junbin SunYu HuiJianing JiangLonghui DengXueqiang Cao
作者单位: 1College of Chemistry and Material Science, Hengyang Normal University, Hunan Province Universities Key Laboratory of Functional Organometallic Materials, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hengyang 421008, PR China
2State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China
3Atmospheric Environment Research Center, Shenyang Academy of Environmental Sciences, Shenyang 110016, PR China
刊名: Applied Surface Science, 2020, Vol.504
来源数据库: Elsevier Journal
DOI: 10.1016/j.apsusc.2019.144509
关键词: CrystallizationAl 2 O 3 phase transitionAmorphous LaMgAl 11 O 19Plasma sprayingThermal barrier coatings
英文摘要: Abstract(#br)Amorphous phase is often detected in the plasma-sprayed LaMgAl 11 O 19 (LMA) coating, the crystallization of which can cause the volume reduction of the coating, resulting in the failure of the coating. However, it is still not clear for the crystallization mechanism of the amorphous phase. In this paper, the coating samples were deposited using atmospheric plasma spraying. Adequate evidence showed that the crystallization of amorphous LMA occurred in two stages at about 900 and 1170 °C, respectively, by studying the phase transition of Al 2 O 3 and the synthesis process of LMA. A novel crystallization mechanism on the amorphous LMA coating was also proposed. Results showed that highly charged La 3+ in LMA magnetoplumbite structure controls the crystallization rate. The...
全文获取路径: Elsevier  (合作)
影响因子:2.112 (2012)

  • sprayed 喷雾的
  • spraying 喷涂
  • plasma 深绿玉髓
  • transition 转移
  • mechanism 机构
  • barrier 堡坝
  • coating 覆盖层
  • phase 相位