碳化硅陶瓷内筒服役过程中的结构演变和蚀损机理

Structural Evolution and Corrosion Mechanism of SiC Ceramic Inner Barrel

通过对使用前后的碳化硅陶瓷预热器内筒样品进行扫描电镜显微观察和X射线衍射分析,得出陶瓷内筒在使用过程中的结构演变和蚀损机理。结果表明:碳化硅陶瓷内筒在热烟气的氧化作用下不断被氧化,随后氧化生成的SiO_2在高速物料的冲蚀磨损作用下断裂、剥落,最终导致的结构损坏。

The structural evolution and corrosion mechanism of SiC ceramic inner barrel were obtained by scanning electron microscope and XRD pattern. These results indicate that SiC is oxidized into SiO_2 by high temperature gases,then the SiO_2 will break and flake and lead to the damage of the structure.