Nitrogen protects fusion reactor steel from lithium-induced damage

AI Insight

This study investigates how nitrogen content affects the corrosion and cracking behavior of Reduced Activation Ferritic/Martensitic (RAFM) steel when exposed to liquid lithium, which is relevant for fusion reactor applications. The research demonstrates that nitrogen plays a critical role in modifying the steel's resistance to lithium-induced degradation, with specific nitrogen concentrations influencing both the corrosion rates and crack formation mechanisms. The findings reveal that controlling nitrogen levels can significantly alter the material's compatibility with liquid lithium environments.

Why it matters

RAFM steels are candidate structural materials for fusion reactors where liquid lithium may be used as a coolant or breeding blanket material. Understanding how to optimize nitrogen content to minimize lithium-induced damage could improve the safety, longevity, and economic viability of future fusion power plants.