Thermal corrosion behavior of Yb4Hf3O12 ceramics exposed to calcium-ferrum-alumina-silicate (CFAS) at 1400 degrees C

In current work, the interaction between representative CFAS deposit (33CaO-10FeO1.5-13AlO1.5-44SiO2) and Yb4Hf3O12 ceramics at 1400 & DEG;C was investigated. Results indicated that the Yb4Hf3O12 ceramics are of high resistance to infiltration of CFAS melt. Microstructure characterization revealed that Yb4Hf3O12 reacted with CFAS to form a continuous reaction layer mainly composed of Yb-Ca-Si apatite, which inhibits CFAS further infiltration. Before the formation of the reaction layer, CFAS melts underwent a crystallization process at high temperatures, precipitating CaYbFeAlSi-garnet, which raised the viscosity of CFAS and thus inhibited the fluidity of CFAS.

Automated summary

In this study, the interaction between CFAS deposit and Yb4Hf3O12 ceramics was investigated, and it was found that Yb4Hf3O12 ceramics exhibit high resistance to infiltration of CFAS melt. Microstructure characterization showed that a continuous reaction layer composed mainly of Yb-Ca-Si apatite formed between Yb4Hf3O12 and CFAS, inhibiting further infiltration of CFAS. Before the formation of the reaction layer, CFAS melts underwent a crystallization process, leading to the precipitation of CaYbFeAlSi-garnet, which increased the viscosity and inhibited the fluidity of CFAS.