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crsic composite coating for water-based liquid environment and its preparation method and application

A composite coating and water-based liquid technology, applied in the coating, metal material coating process, vacuum evaporation plating, etc., to achieve low internal stress, improve tribological properties, reduce friction coefficient and wear rate

Active Publication Date: 2021-04-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are few reports on the preparation of CrSiC coatings prepared by doping Si in CrC coatings by multi-arc ion plating technology to improve the mechanical properties of coatings and their tribological properties in water-based liquid environments.

Method used

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  • crsic composite coating for water-based liquid environment and its preparation method and application
  • crsic composite coating for water-based liquid environment and its preparation method and application

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preparation example Construction

[0035] Another aspect of the embodiments of the present invention also provides a method for preparing the aforementioned CrSiC composite coating for a water-based liquid environment, which includes:

[0036] Using multi-arc ion plating technology, using CrSi alloy as target material, protective gas as working gas, C 2 h 2 As the reaction gas, a negative bias voltage is applied to the substrate, a target current is applied to the CrSi alloy target, and a CrSiC composite coating is deposited on the surface of the substrate.

[0037] In some embodiments, the content of Si atoms in the CrSi alloy target is 1-20 at%, preferably, the atomic ratio of Si to Cr is 1-25 at%:1.

[0038] Preferably, the current applied to the CrSi alloy target is 50-70A.

[0039] Preferably, the negative bias voltage applied to the substrate is -50--300V.

[0040] Preferably, the number of the CrSi alloy targets is not limited, and may be greater than or equal to 2 and less than or equal to 8, and the...

Embodiment 1

[0101] In this example, the above-mentioned CrSiC composite coating was prepared on the basis of 316 stainless steel, which is commonly used in water environment, and the preparation method is as follows:

[0102] (1) Pre-plating treatment

[0103] Put the substrate in petroleum ether, and use ultrasonic stirring to clean it for 15 minutes. After removing the oil on the surface of the substrate, put it into acetone and ultrasonically clean it for 15 minutes, then ultrasonically clean it in absolute ethanol for 15 minutes, and finally take it out and dry it with nitrogen;

[0104] (2) Bias reverse sputter cleaning

[0105] Put the substrate treated in step (1) into the multi-arc ion plating chamber, the temperature of the chamber is 350°C, and the back vacuum is pre-evacuated to 4.00×10 -3 Pa; then, pass Ar gas with a purity greater than or equal to 99.999% into the cavity, the Ar gas flow rate is 100 sccm, the substrate is applied with a negative bias voltage, and the substra...

Embodiment 2

[0117] In this embodiment, the substrate is exactly the same as that in Example 1, and a CrSiC composite coating is prepared on the surface of the substrate, and the preparation method is as follows:

[0118] (1) is identical with the step (1) in embodiment 1;

[0119] (2) same as step (2) in embodiment 1;

[0120] (3) same as step (3) in embodiment 1;

[0121] (4) Deposition of CrSiC composite coating

[0122] Taking the CrSi alloy with a purity greater than or equal to 99.5% as the target material, the content of Si in the CrSi alloy target is 10at%, and the others are the same as the step (4) in Example 1;

[0123] (5) Same as step (5) in Example 1, the prepared coating sample is marked as Si10.

[0124] The composition test results of the CrSiC composite coating prepared in this embodiment are shown in Table 1, and the Si element content in the Si10 coating is 4.3 at%. The XRD test result of present embodiment gained CrSiC composite coating is as follows figure 1 As s...

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Abstract

The invention discloses a CrSiC composite coating for a water-based liquid environment as well as a preparation method and application of the CrSiC composite coating. The CrSiC composite coating comprises a composite structure of hard-phase nanocrystalline CrC and lubricating-phase amorphous carbon a-C: H / Si.. The lubricating phase is a matrix, and the hard phase is dispersed and distributed in the matrix. The preparation method comprises the following steps: by adopting a multi-arc ion plating technology, by taking CrSi alloy as a target material, the protective gas as the working gas and C2H2 as the reaction gas, the negative bias is applied to the matrix, the target current is applied to the CrSi alloy target, and deposition is carried out on the surface of the matrix to form the CrSiCcomposite coating. The CrSiC composite coating has the advantages of low internal stress, high density, low friction, low wear and the like in a water environment, is suitable for matrix protection under high-wear and high-corrosion working conditions in a water-based liquid environment, and can improve the comprehensive performance of the matrix and prolong the service life of the matrix.

Description

technical field [0001] The invention relates to a composite coating, in particular to a CrSiC composite coating for water-based liquid environment and its preparation method and application, belonging to the technical field of substrate surface treatment. Background technique [0002] In recent years, in order to avoid the pollution caused by lubricating oil, the fields of food, medicine, water supply and drainage, and hydraulic pressure have proposed water lubrication systems to replace traditional oil lubrication systems. However, the surface of traditional metal materials in the water lubrication system has problems such as poor lubricity, easy corrosion, and insufficient reliability. Plating a hard coating on the surface of stainless steel materials is an effective way to solve the above problems. At present, carbon-based coatings and nitride coatings are the most promising surface protection materials for water-based hydraulic systems, sliding bearings and mechanical se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/16
CPCC23C14/0021C23C14/0635C23C14/16C23C14/325
Inventor 姜欣王永欣王立平毛春龙毛金根陈善俊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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