Method and device for preparing diamond-like carbon coating by cladding fiber laser

A diamond coating, fiber laser technology, applied in metal material coating process, coating, nanotechnology for materials and surface science, etc. Insufficient and other problems, to achieve the effect of flexible processing, fast response time and simple structure

Active Publication Date: 2012-04-11
江苏大学扬州(江都)新能源汽车产业研究所
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of slow reaction rate, insufficient bonding strength between the coating and the substrate and the inability to perform three-d

Method used

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  • Method and device for preparing diamond-like carbon coating by cladding fiber laser
  • Method and device for preparing diamond-like carbon coating by cladding fiber laser

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example 1

[0022] The base material is TC4, use sandpaper to remove the oxide layer on the surface of the base material and polish it, then use an emulsifier and anhydrous ethanol to remove oil and clean it, and then dry it; open the vacuum chamber (15), position and clamp the workpiece (16) on the On the workbench (17), the fiber laser head (8) is screwed to the powder nozzle (10), the six-degree-of-freedom manipulator (13) clamps the powder nozzle, closes and seals the vacuum chamber, and uses the vacuum pump (18) to pump air , so that the internal pressure reaches 5×10 -3 Pa; add carbon nanotubes to the powder feeder (7), stir to make it evenly mixed, pass in argon gas (20), set the powder feeding rate to 20g / min, move the manipulator, so that the place where the powder gathers on the nozzle is located In the plane of the pre-processed surface; turn on the fiber laser, and set the parameters of the fiber laser by the computer (21). The beam (12) scans the workpiece synchronously and ...

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Abstract

The invention relates to a method and device for preparing a diamond-like carbon coating by cladding a carbon nanotube with fiber laser. The carbon nanotube is cladded with a fiber laser; the carbon nanotube is molten quickly by absorbing laser energy to form liquid carbon, and is cooled at an extremely high cooling speed; a diamond core grows, and undergoes phase change within an extremely short period of time; a part of carbon nanotube phases turn into diamond phases; the slightly-molten surface layer of a substrate material undergoes molecular level and atomic level diffusion, so that a strong metallurgically-bonded diamond-like carbon coating is formed; unbalanced condensation is led by an extremely high cooling speed; and an obtain diamond structure is fine and is approximate to a nanostructure. A used fiber laser head is coaxially connected with a powder spray head; processing is performed in a vacuum cavity; a laser beam is fully superposed with a carbon nanotube beam; and preparation of diamond-like carbon coatings of any shape and three-dimensional processing can be performed in cooperation with a flexible processing system of a six-degree-of-freedom robot.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, in particular to a method and a device for preparing a diamond-like film coating by cladding carbon nanotubes with a fiber laser. Background technique [0002] Diamond-like carbon film is a kind of amorphous carbon film. When there are more diamond phases in it than graphite, the film layer presents characteristics similar to diamond, with ultra-high hardness, conductivity and other properties, and at the same time has unique tribology. characteristics, can be widely used in machinery, electronics, optics, thermals, acoustics, medicine and other fields, and has a good application prospect. The methods for preparing diamond-like carbon films mainly include physical vapor deposition (PVD) and chemical vapor deposition (CVD), specifically ion beam-assisted deposition, magnetron sputtering, vacuum cathodic arc deposition, pulsed laser deposition and plasma enhanced deposition. chemical v...

Claims

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Application Information

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IPC IPC(8): C23C24/10B82Y40/00B82Y30/00
Inventor 任旭东皇甫喁卓阮亮张永康占秋波杨慧敏周建忠戴峰泽孙桂芳
Owner 江苏大学扬州(江都)新能源汽车产业研究所
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