Ceramic layer for in-situ sealing of pores and method for producing same

Abstract

This invention relates to the field of metal surface treatment technology, specifically to an in-situ sealed ceramic layer and its preparation method. In a first aspect, the invention proposes a method for preparing an in-situ sealed ceramic layer, comprising the following steps: Step 1, providing a substrate, the substrate including a first surface and a second surface disposed opposite to each other, the first surface having a Ni-W alloy layer; Step 2, using the substrate as an anode, performing plasma electrolytic oxidation treatment in an electrolyte to form a ceramic layer on the Ni-W alloy layer. In this first aspect, by utilizing the dynamic response and element migration of the Ni-W alloy layer in a PEO environment, the preparation of the ceramic layer and the sealing of pores are carried out simultaneously, achieving in-situ growth and densification of the ceramic layer, resulting in a ceramic layer with both wear resistance and corrosion resistance.

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