کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438134 | 1398181 | 2017 | 10 صفحه PDF | دانلود رایگان |
In this study, the hot corrosion of barium-strontium aluminosilicate (B1âxSxAS) attacked by calcium-magnesium aluminosilicate (CMAS) was investigated at temperatures in the 1200-1400 °C range. Moreover, a corrosion mechanism based on the interdiffusion of Ba/Sr and Ca cations was also proposed. The proposed corrosion mechanism indicated the diffusion of Ba/Sr cations into the CMAS, and Ca cations into the B1âxSxAS during the hot corrosion process. At 1200 °C, a thin corrosion zone was formed at the interface of B1âxSxAS and CMAS due to weak diffusion of Ba/Sr and Ca cations. Further increase in the temperature led to an enhancement in the interdiffusion of Ba/Sr and Ca cations, thus significantly widening the corrosion zone. Moreover, oriental dendrites, identified as monoclinic B1âxSxAS, were found to precipitate in the molten CMAS. Attributed to the faster diffusion rate of Sr cations compared to that of the Ba cations, B1âxSxAS with a higher Sr content was found to be more prone to CMAS-induced corrosion due to the rapid loss of Sr.
Journal: Ceramics International - Volume 43, Issue 1, Part A, January 2017, Pages 212-221