爆炸压涂制备纳米氧化锆涂层及其组织与性能研究

运用爆炸压涂技术在钢基体上制备了较大面积的纳米氧化锆涂层。利用扫描电镜、X射线衍射等手段研究了纳米氧化锆涂层的微观组织、孔隙率和晶粒度。结果表明,制备的纳米氧化锆涂层结构致密,涂层的孔隙率为5%;与基体结合紧密;爆炸压涂前后氧化锆成分未发生变化;涂层中的氧化锆仍然以稳定的单斜相存在,不存在立方相;涂层中的氧化锆晶粒与粉末晶粒尺寸基本一致。爆炸压涂制备的陶瓷涂层能够保持纳米粉末材料的尺寸和特性。

Microstructure and Properties of Nanostructured Zirconia Coating Prepared by Explosive Compaction-Coating

The large-area nanostructured zirconia coating was prepared by explosive compaction-coating. Microstructure, porosity, and average grain size of the coating were investigated by SEM and XRD. The results show that the coating has excellent uniformity and compactness and the porosity is about 5%. The composition does not change after the explosive compaction-coating. The coating is mainly composed of monoclinic phase without cubic zirconia, and the coating average grain size is similar to that of the powder. The ceramic coatings prepared by explosive compaction-coating can keep the dimensions and characteristics of nano powder materials.