涂层制备过程中刚性隔热瓦的变形控制

针对刚性隔热瓦涂层制备过程中高温烧结热处理所导致的变形问题,在对其变形机制分析的基础上,探索了变形控制方法。研究结果表明,刚性隔热瓦在涂层制备过程中的变形来源于涂层玻璃相降温过程中收缩所导致的对于基体材料的压应力。与常规方法相比,仅将涂覆涂层面置于高温环境中烧结热处理,或者采用厚度较大的基体材料成型涂层后再进行二次加工减薄至最终所需厚度,均可明显降低变形量,变形量随基体材料厚度的增加而减小。当这两种方法并用时可进一步降低变形量。

Distortion Control of Ceramic Fiber Rigid Insulation Tiles During Coating Forming

The methods to reduce the distortion of ceramic fiber rigid insulation tiles during high temperature firing procedure required for coating forming were studied. The results indicate that the distortion of the tiles is caused by compressive stresses in coating. However, the distortion significantly decreases when only the coated surface of the substrate is fired at high temperature or a thicker substrate is employed during coating forming and then machined to the required final thickness. And a further decrease of the distortion is achieved when these two methods are used at the same time. Moreover, the distortion decreases with the increasing thickness of substrates independent of the method used.