Method for generating corrosion-resistant wear-resistant high-entropy ceramic coating in situ

• Main Authors: LIANG YONGCHENG, LU JIA, ZHANG JIAHUA, LI YING, NAN BOHUA, CAO XIAO, ZHENG XINGWEI, ZHANG GUOJUN
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention relates to a method for in-situ generation of a corrosion-resistant wear-resistant high-entropy ceramic coating, which comprises the following steps: (1) agglomerating a mixture of rare earth oxide and amorphous boron powder into a spherical shape or a nearly spherical shape by using a spray drying method to obtain agglomerated particles; then, the agglomerated particles are preheated; (2) carrying out sand blasting treatment on the magnesium alloy in an area in which the high-entropy ceramic coating needs to be generated in situ, and then preheating the magnesium alloy subjected to sand blasting treatment; and (3) the agglomerated particles in the step (1) are sprayed on the surface of the magnesium alloy in the step (2) through a plasma spraying method, and the corrosion-resistant and wear-resistant high-entropy ceramic coating is generated on the surface of the magnesium alloy in situ. The method has the advantages of being low in cost, easy to implement, wide in application range and the lik