微晶玻璃复合耐磨陶瓷涂层在粘土砖表面的应用研究

以微晶玻璃、铝矾土和硅酸锆为主要原料，用烧结法在铝质粘土砖表面制备了厚度为1～3mm的耐高温耐磨陶瓷涂层，拓宽了粘上砖的应用范围。该涂层经1350℃烧结后，其主晶相为刚玉（α-Al2O3）、锆英石（ZrSiO2）和透辉石[CaMg（SiO3）2]。微晶玻璃的母体玻璃在1000℃以上熔融，有利于涂层在粘土砖表面铺展和其他组分的扩散，玻璃在冷却过程中会析出透辉石晶相。用光学显微镜观察了粘土砖与涂层的显微结构，发现涂层毒面结构致密，没有孔洞与裂纹。该陶瓷涂层的耐火温度高于140℃，维氏硬度为9-10GPa。

A wear-resistant ceramic coating was prepared on the surface of clay brick using glassceramics, bauxite and zircon as the starting materials. The coating was sintered at 1350℃ and has a thickness of 1-3mm. The main phases of the coating are composed of corundum （α-Al2O3）, zircon （ZrSiO4） and diopside [CaMg（SiO3）2]. The precursor glass melts over 1000℃, which is helpful for the spreading of the coating and the diffusion of other compositions. The diopside is crystallized from the melted glass during the cooling process. Microstructure of the coating and clay brick was observed by optical, microscope. The coating is coating. The coating can be used up to 1400℃ compact and there are no holes and cracks on the and has a Vickers hardness of 9-10GPa.