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Hard coating preparation method with heat diffusion of carbon nanomaterials as pretreatment

A nano-carbon material and hard coating technology, which is applied in the direction of metal material coating technology, solid-state diffusion coating, coating, etc., can solve problems that limit the development and application of hard coatings, and achieve enhanced bonding and improved Nucleation density, effect of high nucleation density

Active Publication Date: 2016-03-09
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, due to the existence of internal stress and interfacial energy between the base material and the hard coating, while obtaining excellent surface properties, the problem of the bonding force between the hard coating and the base material has become a technical bottleneck that is generally considered difficult to solve. Development and Application of Hard Coating Field

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  • Hard coating preparation method with heat diffusion of carbon nanomaterials as pretreatment
  • Hard coating preparation method with heat diffusion of carbon nanomaterials as pretreatment
  • Hard coating preparation method with heat diffusion of carbon nanomaterials as pretreatment

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preparation example Construction

[0029] The preparation of described hard coating:

[0030] Use substances in different states such as gas, solid, or liquid as the raw material source of the hard coating, and pass Ar, N 2 Protective atmosphere conditions, hard coatings of various materials prepared by physical / chemical vapor deposition, solid-state thermal diffusion, and high-energy spraying processes, the low pressure is 30-500Pa.

Embodiment 1

[0032] 20# steel was used as the base material, and nano-sized diamond powder was used as the carbon source for solid-state thermal diffusion treatment of nano-carbon materials. After cleaning and polishing, diamond / diamond-like carbon films were prepared on the steel surface by PECVD-plasma enhanced chemical vapor deposition technology. The specific method steps are as follows:

[0033]First, use nano-diamond powder as a carbon source for solid-state thermal diffusion on the surface of the substrate.

[0034] Grinding the surface of the base material 20# steel to remove dirt, burrs and rust on the surface. In order to ensure the uniformity of solid-state thermal diffusion and surface finish, before the thermal diffusion treatment of the base material, polishing treatment, deionized water / alcohol cleaning . Place the nano-diamond powder with a particle size of 50-500nm in an organic dispersant, and carry out deagglomeration and dispersion treatment under the action of ultraso...

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Abstract

The invention discloses a hard coating preparation method with heat diffusion of carbon nanomaterials as pretreatment. The preparation method comprises the steps of solid heat diffusion treatment of carbon nanomaterials, cleaning and etching of pretreatment base materials and preparation of a hard coating. In the step of solid heat diffusion treatment of the carbon nanomaterials, nanoscale diamond, carbon nanotubes, graphene, graphite and carbon fiber are used as carbon sources, solid heat diffusion treatment is carried out at a certain temperature, and the concentration of the nano carbon sources is distributed in a graded manner in the depth direction of the base materials. In the step of the cleaning and etching of the pretreatment base materials, the decontamination treatment, polishing, cleaning, etching of corrosive liquid and drying are carried out to enable the surface of the base materials to be flat, smooth and clean, and the nanoscale second-phase particles are exposed on the surface of a base body through etching of the specific corrosive liquid. In the step of preparation of the hard coating, substances in gas, liquid and solid states are used as carbon sources, and the diamond / diamond-like hard coating is prepared through physical / chemical vapor deposition, solid heat diffusion and high-energy spraying technologies.

Description

technical field [0001] The invention relates to a method for preparing a hard coating, in particular to a method for preparing a hard coating with thermal diffusion of nano-carbon materials as pretreatment. Background technique [0002] Preparing a hard coating on the surface of the material can improve the surface strength, hardness, wear resistance and corrosion resistance of the material, and can be used in many fields such as turning tools, drills, molds, and precision instruments. There are various kinds of hard coatings at present, such as diamond-like carbon film (DLC), diamond film, TiC / TiN film, BN / CBN film and so on. However, due to the existence of internal stress and interfacial energy between the base material and the hard coating, while obtaining excellent surface properties, the problem of the bonding force between the hard coating and the base material has become a technical bottleneck that is generally considered difficult to solve. Development and applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/66C23C30/00C23C16/513C23C16/27C23C16/02
CPCC23C8/66C23C16/02C23C16/27C23C16/513C23C30/00C23C16/276
Inventor 陶庆王健赖伟陈正沈承金刘建阳刘伟
Owner CHINA UNIV OF MINING & TECH
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