Anti-biological-contamination CrN-Ag composite coating and preparation method thereof

A composite coating, biofouling technology, applied in the direction of coating, metal material coating process, ion implantation plating, etc., can solve the problem of limited life extension effect, achieve high hardness, improve anti-biofouling and antibacterial properties Effect

Inactive Publication Date: 2019-01-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
3 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] At present, although the commonly used surface enhancement coating technology can prolong the wear life of stainless steel and other parts, it has limited life extension effect on fri...
View more

Abstract

The invention provides an anti-biological-contamination CrN-Ag composite coating. The anti-biological-contamination CrN-Ag composite coating is composed of nanocrystalline CrN and Ag second phase, wherein the atomic percentage content of Ag is 9-25%. The composite coating has good anti-fouling performance while ensuring the hardness, and can be used for substrate protection in harsh working conditions such as seawater. According to the CrN-Ag composite coating, magnetron sputtering technology is adopted, and an Ag target and a Cr target are selected, high-purity nitrogen is used as working gas, the CrN-Ag composite coating is deposited on the surface of the cleaned substrate, the Ag content in the composite coating can be controlled by regulating and controlling the Ag target current, andfurther the hardness and the anti-biological-contamination performance of the composite coating are regulated and controlled.

Application Domain

Vacuum evaporation coatingSputtering coating +1

Technology Topic

Nitrogen gasHardness +4

Image

  • Anti-biological-contamination CrN-Ag composite coating and preparation method thereof
  • Anti-biological-contamination CrN-Ag composite coating and preparation method thereof
  • Anti-biological-contamination CrN-Ag composite coating and preparation method thereof

Examples

  • Experimental program(1)

Example Embodiment

[0024] Example 1:
[0025] In this embodiment, the base material is 316 stainless steel. Using magnetron sputtering technology to prepare CrN-Ag composite coating on the surface of the substrate mainly includes the following steps:
[0026] (1) The surface of the substrate is mechanically polished and polished, and ultrasonically cleaned with petroleum ether, acetone and alcohol for 3 times, and then dried with flowing nitrogen.
[0027] (2) Put the cleaned substrate into the magnetron sputtering chamber and evacuate to a vacuum of 10 -3 Pa; Then, sputter cleaning the target for 2 minutes, and ion-etch the matrix sample for 20 minutes.
[0028] (3) Sputtering a Cr target (purity of 99.95at.%) for 10 minutes, and depositing a Cr transition layer on the surface of the substrate.
[0029] (4) Preparation and deposition of CrN-Ag composite coating.
[0030] The cavity is filled with high-purity nitrogen (purity 99.99at.%), the flow is set to 24sccm, Ag target (purity is 99.99at.%) and Cr target (purity is 99.95at.%), the current of Cr target is 4A, adjust the Ag target current to 0A, 0.4A, 0.6A, 0.8A and 1.2A respectively, deposit a CrN-Ag composite coating on the surface of the substrate, the deposition time is 4h, and produce 5 sets of CrN-Ag composite coatings with different Ag content For layer samples S1-S5, the specific parameters are shown in Table 1:
[0031] Table 1: Parameter table of CrN-Ag composite coating samples when the Ag target current is 0A, 0.4A, 0.6A, 0.8A and 1.2A
[0032]
[0033] It can be seen from Table 1 that the S1 coating sample is a CrN coating, and the S2-S5 coating sample is a CrN-Ag coating.
[0034] figure 1 In order to obtain the hardness of the CrN-Ag composite coating sample, when the silver content is 20.8 at.%, the hardness of the CrN-Ag coating is about 12 Gpa.
[0035] figure 2 with image 3 They are the fluorescence image and the number of seaweed attached to the surface of the CrN-Ag composite coating prepared above. From figure 2 It can be seen that the number of Chlorella, Crescent Diatom and Phaeodactylum tricornutum on the surface of coating S2-S5 is significantly less than that of coating S1. In the coating S2-S5, the Ag content in the coating S4 is 20.8at.%, and the number of attachments is the least.
[0036] image 3 It can further illustrate the changes in the number of seaweed attached, from image 3 It can be seen that when the Ag content is 20.8at.%, the CrN-Ag composite coating has the best anti-seaweed adhesion effect. Compared with the CrN coating, the CrN-Ag composite coating has the best effect on chlorella and crescent. The adhesion reduction rate of diatom and Phaeodactylum tricornutum reached 45%, 72% and 64% respectively.
[0037] Figure 4 The antibacterial results of CrN coating with silver content of 0at.% and CrN-Ag coating with silver content of 20.8at.% against E. coli are shown. Figure 5 The antibacterial results of CrN coating with silver content of 0at.% and CrN-Ag coating with silver content of 20.8at.% against Bacillus subtilis are shown. It can be seen that the CrN-Ag coating with a silver content of 20.8at.% was soaked in the bacterial liquid of E. coli for 24 hours, and the antibacterial rate of E. coli reached 100%, while it was soaked in the bacterial liquid of Bacillus subtilis It reached 100% after 6h. For two different gram bacteria, CrN-Ag has shown good antibacterial properties, and has potential application value in marine antifouling functional coatings.
[0038] versus Figure 4 Similarly, the antibacterial properties of CrN-Ag coatings with silver content of 9.2at.%, 15.1at.%, and 25.6at.% to Escherichia coli are higher than that of CrN coatings with silver content of 0at.%.
[0039] versus Figure 5 Similarly, the antibacterial properties of CrN-Ag coatings with silver content of 9.2at.%, 15.1at.%, and 25.6at.% to Bacillus subtilis are higher than that of CrN coatings with silver content of 0at.%.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Flash electrophoretic paint and its prepn process

ActiveCN101089103Agood toughnesshigh hardness
Owner:武汉双虎涂料股份有限公司

Classification and recommendation of technical efficacy words

  • high hardness

Waterborne two-component woodware coating and preparation method thereof

ActiveCN106221541Ahigh hardnessgood chemical resistance
Owner:BEIJING BUILDING MATERIALS ACADEMY OF SCI RES

Modified epoxy mortar abrasion-resistant patching material

ActiveCN103482904Ahigh elastic modulushigh hardness
Owner:WUDA JUCHENG STRUCTURE CO LTD

Rapid high-temperature curing drying process of lead-acid storage battery unformed electrode plate

ActiveCN103762340Ahigh hardnessSlow down the rate of softening
Owner:TIANNENG GRP JIANGSU TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products