Method for depositing composite ceramic film by differential arc oxidation

Abstract

The invention relates to a method of preparing a composite ceramic film through micro-arc oxidation and composite deposition, is characterized in that the method includes the following steps: firstly, the workpiece is used as the anode; secondly, other particulates are added to the normal micro-arc oxidation electrolyte; and thirdly a composite deposition is realized while the micro-arc oxidation is conducted. The invention has the advantages that the method changes the history that a composite deposition fails to be conducted for the anodic oxide film, and through the technique, particulates of various types can be added to the electrolyte to change the surface property of the material, wearing resistance, corrosion resistance as well as other special performances are improved, and the application range of the valve metal is enlarged.

Description

Technical field [0001] The invention relates to a method for depositing a composite ceramic film by micro-arc oxidation. Background technique [0002] The concept of micro-arc oxidation began in the 1950s, and gradually aroused the research interest of foreign academic circles in the late 1970s, and became a research hotspot of scholars at home and abroad in the 1990s. Micro-arc oxidation technology is developed on the basis of anodizing technology, but the film formation mechanism of the two is very different, which leads to the difference in their preparation process and film performance. The micro-arc oxidation technology uses a higher voltage in the preparation, which is completely beyond the scope of anodization. The preparation voltage area is introduced from the Faraday area to the high-voltage discharge area. In the process of micro-arc oxidation, chemical oxidation, electrochemical oxidation and plasma oxidation simultaneously exist. The formation process of ceramic oxid...

AI Technical Summary

Problems solved by technology

[0004] The film growth of chemical composite plating and composite electrodeposition method grows from the substrate to the electrolyte. The ordinary anodic oxide film grows from the outer surface of the substrate to the inside. Although there are certain pores in the film, it is very small and the external The particles cannot be deposited in the membrane, even if some particles enter the micropores, they cannot enter the interior of the membrane

There is no report on composite electrodeposition of anodized film layer in the search data, nor is there any report on composite deposition using micro-arc oxidation method