Hot section components of gas turbines are exposed to a high operating temperature environment. To protect these components, thermal barrier coatings (TBC) are applied to their surfaces. Yttria-stabilized zirconia (YSZ), which is widely used as a TBC material, faces limitations at temperatures above 1200 °C. To mitigate these issues, research has focused on adding lanthanide rare earth oxides and tetravalent oxides to prevent the phase-transformation of the monoclinic phase in zirconia. This study investigated the effects of varying TiO2 content in Nd2O3 and Yb2O3 co-doped YSZ composites. Increasing TiO2 content effectively suppressed formation of the monoclinic phase and increased the thermal degradation resistance compared to YSZ in environments over 1200 °C. These findings will aid in developing more thermally stable and efficient TBC materials for application in high-temperature environments.

1. Introduction 
2. Experimental Procedure
3. Results and Discussion 
4. Conclusion 
Conflict of Interest Declaration 
Author Information and Contribution  
Acknowledgement
References

• 이계원(한국세라믹기술원 엔지니어링소재센터, 고려대학교 신소재공학과) | Gye-Won Lee (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology,17303, Republic of Korea, Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea)
• 최선웅(한국세라믹기술원 엔지니어링소재센터) | Seonung Choi (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology,17303, Republic of Korea)
• 박태준(한국세라믹기술원 엔지니어링소재센터, 고려대학교 신소재공학과) | Tae-jun Park (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology,17303, Republic of Korea, Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea)
• 김종일(한국세라믹기술원 엔지니어링소재센터) | Jong-il Kim (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology,17303, Republic of Korea)
• 이인환(고려대학교 신소재공학과) | In-hwan Lee (Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea)
• 오윤석(한국세라믹기술원 엔지니어링소재센터) | Yoon-seok Oh (Engineering Materials Center, Korea Institute of Ceramic Engineering and Technology,17303, Republic of Korea) Corresponding author