Anti-crack magnetron sputtering black chromium coating structure and black chromium coating crack improvement method

CN119307871APending Publication Date: 2025-01-14XINZESHENG TECH CO LTD
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Patent Information

Application Number
CN202411400924.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-09
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

In the magnetron sputtered black chrome film layer, due to the large difference in the thermal expansion coefficient between the substrate and the black chrome film layer, the extremely thin black chrome coating is difficult to resist thermal stress and is prone to cracks, which affects the production pass rate.

Method used

Add a chromium layer to the chromium nitride layer of magnetron sputtering black chromium film layer as stress reduction layer, and improve the basic metal UV primer coating components to increase the adhesion of the film layer and the stability of the chelate reduces the release of thermal stress.

Benefits of technology

The crack problem caused by the difference in thermal expansion coefficient between the substrate and the black chrome film layer is effectively improved, the production pass rate is improved, and the occurrence of cracks is further reduced by enhancing the adhesion and thermal stability of the film layer.

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Abstract

The invention discloses an anti-crack magnetron sputtering black chromium plating film layer structure. A chromium layer is additionally arranged in a chromium nitride layer of a magnetron sputtering black chromium plating film layer. The invention further discloses a surface crack improving method for the magnetron sputtering black chromium plating film layer. The surface crack improving method comprises the steps that 1, pretreatment is conducted; step 2, electrostatic dust collection; 3, prime coat spraying, wherein paint used for prime coat spraying comprises 97 parts by mass of basic metal UV prime coat paint, 2 parts by mass of 2-hydroxyethyl methacrylate phosphate and 1 part by mass of organic-inorganic hybrid polyurethane acrylic resin; 4, magnetron sputtering coating is conducted, specifically, a chromium target sputtering program is operated at first; then a chromium nitride sputtering program is operated; and step 5, spraying a top coat. The invention belongs to the technical field of physical vapor deposition, and solves the problems that in the prior art, the thermal expansion coefficient difference between a base material and a black chromium film layer is too large, an ultra-thin black chromium coating is difficult to resist thermal stress, and cracks are prone to occurring.
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