Hot Corrosion Behavior of DS GTD111 Superalloy and YSZ/CoCrAlY Thermal Barrier Coating at 950 ℃
Author of the article:RENWeipeng1, QI Chuang1, FAN Shaomin1, LIANG Zhaosen1, XIAO Chengbo1, HE Limin2
Author's Workplace：1. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing 100095, China; 2. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing 100095, China
Key Words：DS GTD111; superalloy; thermal barrier coating; hot corrosion
Abstract：
The YSZ/CoCrAlY thermal barrier coating (TBC) was deposited by electron beam physical vapor deposition
(EB-PVD) on DS GTD111 superalloy. The hot corrosion behavior of DS GTD111 and its thermal barrier coating was
studied. And corrosion kinetics and corrosion products were analyzed. The results show that the thickness of the oxide or
corrosion product layer on the surface of the bonding layer of the thermal barrier coating sample decreased significantly
compared with that of the test alloy under the condition of salt coating at 950 ℃ for 100 h. Applying thermal barrier
coating can greatly improve the alloy's resistance to thermal corrosion of molten salt at 950 ℃, and the failure and cracking
of thermal barrier coating is the interface between TGO and bonding layer. The thermal corrosion behavior of
YSZ/CoCrAlY thermal barrier coating is not significantly affected by the alloy substrate under the condition of salt coating
at 950 ℃ for 100 h.
