TY - JOUR
T1 - Effect of sample rotation speed on microstructure and thermal cycling behaviour of (Gd0.8Yb0.2)2Zr2O7/YSZ dual-layer thermal barrier coatings prepared by EB-PVD
AU - Wang, Bo
AU - Jiang, Chengyang
AU - Guo, Hongbo
N1 - Publisher Copyright:
© 2022 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - A (Gd0.8Yb0.2)2Zr2O7/YSZ double ceramic layer thermal barrier coating (TBC) system prepared by electron-beam physical vapor deposition (EB-PVD) is a promising choice for protecting hot-section parts of areo-plane gas-turbine engines at ultra-high temperature. The microstructure and further thermal cycling lifespan are strongly dependent on the EB-PVD process parameters (sample rotational speed, deposition temperature, chamber pressure, etc.). In the current study, three kinds of (Gd0.8Yb0.2)2Zr2O7/YSZ double ceramic layer TBCs were manufactured with different sample rotation speeds by EB-PVD. The thermal cycling behaviour of the three TBCs with different microstructures was investigated at 1150°C in comparison with the single YSZ-TBC. The results showed that TBCs prepared with low sample rotation speed were made of small and irregular columnar grains and exhibited the best thermal cycling behaviour among all the tested TBCs. The effect of sample rotation speed during deposition on microstructure and further thermal cycling behaviour, including crack evolution and TGO growth were discussed.
AB - A (Gd0.8Yb0.2)2Zr2O7/YSZ double ceramic layer thermal barrier coating (TBC) system prepared by electron-beam physical vapor deposition (EB-PVD) is a promising choice for protecting hot-section parts of areo-plane gas-turbine engines at ultra-high temperature. The microstructure and further thermal cycling lifespan are strongly dependent on the EB-PVD process parameters (sample rotational speed, deposition temperature, chamber pressure, etc.). In the current study, three kinds of (Gd0.8Yb0.2)2Zr2O7/YSZ double ceramic layer TBCs were manufactured with different sample rotation speeds by EB-PVD. The thermal cycling behaviour of the three TBCs with different microstructures was investigated at 1150°C in comparison with the single YSZ-TBC. The results showed that TBCs prepared with low sample rotation speed were made of small and irregular columnar grains and exhibited the best thermal cycling behaviour among all the tested TBCs. The effect of sample rotation speed during deposition on microstructure and further thermal cycling behaviour, including crack evolution and TGO growth were discussed.
KW - Degradation and failure
KW - EB-PVD
KW - Sample rotation speed
KW - Thermal barrier coatings (TBCs)
KW - Thermal cycling test
UR - https://www.scopus.com/pages/publications/85148720037
U2 - 10.1016/j.ceramint.2022.12.232
DO - 10.1016/j.ceramint.2022.12.232
M3 - 文章
AN - SCOPUS:85148720037
SN - 0272-8842
VL - 49
SP - 13559
EP - 13569
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -