Unravelling the impact of palladium on ruthenium-induced corrosion of SiC coatings in TRISO particles
Source abstract
Abstract
Ru and Pd are fission products released through SiC layer in TRISO fuel at high temperature. This study investigates the corrosion behaviour of Ru-Pd on SiC layers of tri-structural isotropic (TRISO) particles. Specifically, it explores the effects of Pd (strongly reactive FP) on Ru (weakly reactive FP)-induced corrosion. In Pd-Ru/SiC systems, a Ru-Pd-Si liquid phase forms at high temperatures even with minimal Pd, accelerating corrosion along SiC grain boundaries. Comparing Pd’s role in Ru/SiC and Ag/SiC systems underscores the importance of liquid phases in FP migration. A novel approach is proposed for predicting the corrosion effects of multiple FPs on SiC through enthalpic interaction analysis. • Ru-SiC corrosion below 1500°C remains solid, with slow and uniform reaction. • High Pd content (>1 %) causes Pd-SiC corrosion only, preventing Ru-SiC corrosion. • Low Pd content (<1 %) induces Ru-Pd-Si liquid migration through SiC grain boundaries. • Liquid phase and reactive FPs are crucial factors for FP fast migration in SiC. • A novel way for predicting corrosion effect of multiple FPs on SiC is proposed.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced materials and composites · Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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