熔烧温度对Al-SiC硅酸盐基陶瓷涂层性能的影响

以硅酸盐溶液为基料,添加金属Al粉、SiC、TiO₂、玻璃料等陶瓷骨料,采用高温熔烧法在304不锈钢表面制备了硅酸盐基陶瓷涂层,使用扫描电子显微镜(SEM)、热重分析仪(TG)、X射线衍射仪(XRD)等研究了熔烧温度对涂层性能的影响。结果表明,涂层在700~1 100 ℃熔烧过程中,陶瓷涂层与金属基体之间呈冶金结合,伴随有Al₂O₃和TiO₂的晶相转变;涂层厚度为150 μm,并在800 ℃熔烧固化时,结合强度最高,为23.3 MPa;涂层经1 000 ℃高温熔烧后剩余固体含量为76.7%,表现出良好的耐高温性。

Effect of Fusion Temperature on Properties of Al-SiC Silicate-Based Ceramic Coating

The silicate-based ceramic coating is prepared on the surface of 304 stainless steel with a high temperature fusion method, wherein the silicate solution serves as binder and different kinds of ceramic aggregates including metal Al powder, SiC, TiO₂ and glass frit are added. The influence of fusion temperature on the properties of the coating is researched by SEM, TG and XRD. The results show that when the coating is fused at 700~1 100 ℃, the ceramic coating is metallurgically bonded with the metal matrix and accompanied by the crystal phase transition of Al₂O₃ and TiO₂. The bonding strength of the coating with 150 μm thickness fused at 800 ℃ reaches a maximum of 23.3 MPa. The remaining solid content of the coating fused at 1 000 ℃ is 76.7%, showing excellent high temperature resistance.