Treatment method of diamond-like carbon film

Abstract

The treatment method of the diamond-like carbon film comprises the following steps: placing the diamond-like carbon film in a vacuum cavity with negative pressure; and the diamond-like carbon film is heated, an external electric field is applied to the vacuum cavity, and carbon elements of the diamond-like carbon film generate electron migration under the action of the external electric field and are locally converted into graphite. The hardness of the diamond-like carbon film can be reduced, and the method is simple, short in technological process, high in efficiency, low in energy consumption and suitable for industrial application and popularization.

Description

Technical Field

[0001] The invention relates to the field of film material manufacturing, and in particular to a method for processing a diamond-like carbon film. Background Art

[0002] Diamond-like carbon (DLC) coatings have attracted more and more attention and applications due to their high coating hardness and low friction coefficient. Due to their high hardness, DLC coatings are often plated on the surface of metal objects as a protective layer. However, they also have disadvantages in some applications: high hardness, brittle material, and easy to fall off from the substrate. Therefore, in the prior art, it is often necessary to further treat the DLC coating, such as plasma treatment, to reduce its hardness. However, this method has the disadvantages of high energy consumption, high cost, long processing time, and complex process.

[0003] Therefore, it is necessary to provide a method for processing a diamond-like carbon film to overcome the above defects. Summary of the invention

[0004] The purpose of the present invention is to provide an improved method for treating diamond-like carbon film, which can reduce the hardness of the diamond-like carbon film, and the method is simple, has a short process flow, high efficiency, low energy consumption, and is suitable for industrial promotion and use.

[0005] To achieve the above object, the method for processing a diamond-like carbon film of the present invention comprises the following steps:

[0006] The diamond-like carbon film is placed in a vacuum chamber at negative pressure; and

[0007] The diamond-like carbon film is heated, and an external electric field is applied to the vacuum chamber. Under the action of the external electric field, the carbon elements of the diamond-like carbon film undergo electron migration and local transformation to form graphite.

[0008] Compared with the prior art, the present invention places the diamond-like carbon film in a negative pressure vacuum chamber, uses an external electric field to assist, and utilizes the electron migration characteristics of carbon elements. The local diamond-like carbon film is transformed from diamond-like carbon to graphite in the vacuum chamber, which reduces the hardness of the film material to a certain extent. At the same time, the method has short processing time, low energy consumption, low cost, and is easy to mass produce, and has great application prospects and economic benefits.

[0009] Preferably, the voltage of the external electric field is 2-3 kV, and the duration is 20-40 minutes.

[0010] Preferably, the heating temperature of the diamond-like carbon film is 300-350°C.

[0011] Preferably, the thickness of the diamond-like carbon film is 200-500 nm.

[0012] Preferably, the method further comprises: protecting a part of the diamond-like carbon film with a resin glue.

[0013] Preferably, the resin glue is arranged at intervals on the diamond-like carbon film in a predetermined manner. DETAILED DESCRIPTION

[0014] The method for treating the diamond-like carbon film of the present invention is further described below in conjunction with the embodiments, but the present invention is not limited thereby. The method of the present invention aims to provide a method for treating the diamond-like carbon film, which can reduce the hardness of the diamond-like carbon film, and the method is simple, the process flow is short, the efficiency is high, the energy consumption is low, and it is suitable for industrial promotion and use.

[0015] In one embodiment of the method for treating a diamond-like carbon film of the present invention, the following steps are included:

[0016] The diamond-like carbon film is placed in a vacuum chamber at negative pressure; and

[0017] The diamond-like carbon film is heated, and an external electric field is applied to the vacuum chamber. Under the action of the external electric field, the carbon elements of the diamond-like carbon film undergo electron migration and local transformation to form graphite.

[0018] The present invention places the diamond-like carbon film in a vacuum chamber with negative pressure, uses an external electric field to assist, and utilizes the electron migration characteristics of carbon elements. The local diamond-like carbon film is transformed from diamond-like carbon to graphite in the vacuum chamber, which reduces the hardness of the film material to a certain extent. At the same time, the method is simple to operate, has a short processing time, low energy consumption, low cost, and is easy to mass produce, and has great application prospects and economic benefits.

[0019] Specifically, as a preferred embodiment, first, a diamond-like carbon film material is prepared, and the thickness of the diamond-like carbon film material is preferably 200-500nm. The diamond-like carbon film can be partially protected, for example, by covering it with a resin glue, and the resin glue is usually arranged in the form of glue dots on the diamond-like carbon film in rows or longitudinal intervals. The size and shape of the glue dots are consistent, and can be square, circular, triangular or rhombus. The covered part of the diamond-like carbon film will not undergo subsequent electron migration.

[0020] Next, after the resin glue is cured, the diamond-like carbon film material is placed in a vacuum chamber and heated, for example, at a heating temperature of 300-350° C. At the same time, an external electric field is applied to the vacuum chamber, preferably, the voltage of the external electric field is 2-3 kV, and the time is 20-40 minutes, so that the carbon element of the diamond-like carbon film material undergoes electron migration under the action of the electric field.

[0021] Specifically, the surface carbon elements of the diamond-like carbon film that is not covered and protected by the resin glue undergo electron migration under the action of the external electric field and are partially converted into graphite. The hardness of the graphite material is lower than that of the diamond-like carbon material. At the same time, the degree of electron migration can be adjusted by controlling the external electric field, and it is better to partially migrate and transform into graphite. In addition, the diamond-like carbon film that is covered and protected by the resin glue does not undergo electron migration at all, and continues to maintain the characteristics of the diamond-like carbon material film.

[0022] It can be seen that the present invention places the diamond-like carbon film in a negative pressure vacuum chamber, uses an external electric field to assist, and utilizes the electron migration characteristics of carbon elements to achieve the transformation of the local diamond-like carbon film from diamond-like carbon to graphite in the vacuum chamber, thereby reducing the hardness of the film material to a certain extent. At the same time, the method is simple to operate, has a short processing time, low energy consumption, low cost, and is easy to mass produce, and has great application prospects and economic benefits.

[0023] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for processing a diamond-like carbon film, characterized in that: The following steps are involved: The diamond-like carbon film is placed in a vacuum chamber at negative pressure; as well as The diamond-like carbon film is heated, and an external electric field is applied to the vacuum chamber. Under the action of the external electric field, the carbon elements of the diamond-like carbon film undergo electron migration and local transformation to form graphite.

2. The method for treating a diamond-like carbon film according to claim 1, wherein: The voltage of the external electric field is 2-3 kV, and the duration is 20-40 minutes.

3. The method for treating a diamond-like carbon film according to claim 1, wherein: The heating temperature of the diamond-like carbon film is 300-350°C.

4. The method for treating a diamond-like carbon film according to claim 1, wherein: The thickness of the diamond-like carbon film is 200-500nm.

5. The method for treating a diamond-like carbon film according to claim 1, wherein: Also includes: A resin glue is used to protect a part of the diamond-like carbon film.

6. The method for treating a diamond-like carbon film according to claim 5, wherein: The resin paste is arranged on the diamond-like carbon film in a predetermined manner.