A multilayer structure high bearing self-lubricating erosion-resistant coating and a preparation method and application thereof

By introducing a multi-layer structure design with Nb main transition layer and NbC transition layer between the metal ceramic support layer and the DLC layer, the corrosion and friction problems of metal ceramic coatings in marine environments are solved, the bonding strength and wear resistance of the coating are improved, and the service life of mechanical parts is extended.

CN122147226APending Publication Date: 2026-06-05GUANGDONG INST OF NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG INST OF NEW MATERIALS
Filing Date
2026-03-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing metal-ceramic coatings are prone to corrosion in marine environments, have high friction coefficients and poor wear resistance, and are difficult to meet the requirements for long life and high reliability under dynamic friction-wear-corrosion coupling.

Method used

The coating adopts a multi-layer structure design, including a metal-ceramic support layer, a transition layer, and a DLC layer. The transition layer consists of an Nb main transition layer and an NbC transition layer. The transition layer has a columnar crystal morphology and enhances the bonding strength and corrosion resistance by gradually relieving the interlayer thermal/compressive stress.

Benefits of technology

It improves the bonding strength, load-bearing capacity and corrosion resistance of the coating, and achieves a synergistic improvement in self-lubricating and wear-resistant properties, thereby extending the service life of mechanical parts and the safety of equipment under marine conditions.

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Abstract

The application discloses a multilayer structure high bearing self-lubricating erosion-resistant coating and a preparation method and application thereof, and belongs to the technical field of composite coatings. The multilayer structure high bearing self-lubricating erosion-resistant coating comprises a metal ceramic support layer, a transition layer and a DLC layer arranged on the surface of a substrate in sequence; the transition layer comprises an Nb main transition layer away from the DLC layer and an NbC transition layer close to the DLC layer; the transition layer has a columnar crystal morphology as a whole; and the total thickness of the transition layer is 0.1 microns to 2 microns. The multilayer structure high bearing self-lubricating erosion-resistant coating gradually relieves the thermal / pressure stress between layers through specific multilayer structure design, effectively improves the bonding strength, bearing capacity, corrosion resistance and protective durability of the coating, realizes the synergistic improvement of the self-lubricating erosion-resistant performance of the coating, and can improve the service life of parts and the safety of equipment under marine working conditions.
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