Mechanism of YSZ diffusion barrier on restraining interdiffusion of Ni and Ti in NiCrAlY/TiAl alloy

Key Points

• YSZ diffusion barrier significantly reduces the interdiffusion of Ni and Ti in the alloy structure, enhancing stability.
• Interdiffusion rates between Ni and Ti were decreased by 70% when the YSZ barrier was applied in experimental setups.
• Assessment using high-temperature diffusion experiments demonstrated the effectiveness of the YSZ barrier.
• Findings indicate that YSZ barriers may improve long-term performance in high-temperature alloy applications.