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采用固相反应法分别在MB2镁合金基体上制备Al2O3基和SiO2基复相陶瓷涂层,确定了陶瓷涂层的较佳配方如下:SiO2基陶瓷涂层为m(SiO2):m(Al2O3):m(MgO):m(钠长石)=66.8:13.2:12:8,Al2O3基陶瓷涂层为m(Al2O3):m(SiO2):m(MgO):m(ZnO)=66:12:12:10,陶瓷料浆与粘接剂质量比为0.5:1。对所制备的涂层结构,封孔前后涂层的致密性、耐酸性、耐盐水性以及耐磨性进行了测试。结果表明,SiO2基复相陶瓷涂层因在热固化过程中产生大量新相,而提高了涂层的致密性。与镁合金基体相比,封孔后涂层的耐酸性和耐盐水性分别提高了21倍和17倍,相对耐磨性增强了1.94倍,均优于封孔后Al2O3基复相陶瓷涂层的相关性能。
The solid phase reaction method was used to prepare Al2O3-based and SiO2-based composite coatings on MB2 magnesium alloy substrate respectively. The optimum formulation of the ceramic coating was determined as follows: SiO2 (SiO2): m (Al2O3) (Al2O3): m (SiO2): m (MgO): m (ZnO) = 66: 12 : 12: 10, ceramic slurry and adhesive mass ratio of 0.5: 1. The prepared coating structure, the density of the coating before and after sealing, acid resistance, salt water resistance and abrasion resistance were tested. The results show that the SiO2-based composite ceramic coatings improve the densification of coatings due to the large amount of new phases produced during thermal curing. Compared with the magnesium alloy matrix, the acid resistance and salt water resistance of the post-sealing coating were increased by 21 times and 17 times respectively, and the relative wear resistance increased by 1.94 times, which was better than that of the Al2O3-based composite coating after sealing Related performance.