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Method for preparing conductive coating on surface of composite material through plasma spraying

A composite material and conductive coating technology, which is applied in metal material coating process, coating, molten spraying, etc., can solve problems such as poor bonding strength and difficulty in controlling the conductivity of metal mesh/foil

Pending Publication Date: 2021-09-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal mesh technology and metal foil paving technology are to paste the metal mesh / foil on the surface of the composite material. The bonding strength of the metal mesh / foil and the composite material is poor, and the conductivity of the metal mesh / foil is difficult to control, and the above method is not suitable for Large structural parts

Method used

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  • Method for preparing conductive coating on surface of composite material through plasma spraying
  • Method for preparing conductive coating on surface of composite material through plasma spraying
  • Method for preparing conductive coating on surface of composite material through plasma spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Clean the surface of the glass fiber-resin composite matrix with acetone, and use white jade corundum for sand blasting.

[0040] (2) Install the glass fiber-resin matrix to be sprayed on the workbench of the plasma spraying equipment, and clean the surface of the matrix with compressed air.

[0041] (3) Load pure copper powder into the powder feeder of the plasma spraying equipment, set the spraying route of the manipulator, adjust the process parameters of the plasma spraying equipment, preheat the surface of the glass fiber-resin composite material to 20°C, and then use plasma The spray gun sprays pure copper powder onto the surface of the glass fiber-resin composite material substrate to be sprayed to form a pure copper conductive coating; the spraying parameters are: current 550A, voltage 25V, powder feeding rate 15g / min, main air flow 60SCFH, auxiliary air The flow rate is 5SCFH, the main gas is nitrogen, and the auxiliary gas is helium.

[0042] The macrophoto...

Embodiment 2

[0046] (1) Clean the surface of the carbon fiber reinforced carbon composite matrix with acetone, and use white jade corundum for sand blasting.

[0047] (2) Install the carbon fiber reinforced carbon composite material matrix to be sprayed on the workbench of the plasma spraying equipment, and clean the surface of the matrix with compressed air.

[0048] (3) Load the pure copper powder into the powder feeder of the plasma spraying equipment, set the spraying route of the manipulator, adjust the process parameters of the plasma spraying equipment, preheat the surface of the carbon fiber reinforced carbon composite material substrate to be sprayed to 20°C, and then use The plasma spray gun sprays pure copper powder onto the surface of the carbon fiber reinforced carbon composite material to form a pure copper conductive coating; the spraying parameters are: current 600A, voltage 30V, powder feeding rate 40g / min, main air flow 100SCFH, auxiliary air flow 10SCFH , the main gas is...

Embodiment 3

[0052] (1) Clean the surface of the carbon fiber reinforced silicon carbide composite matrix with acetone, and use white jade corundum for sand blasting.

[0053] (2) Install the carbon fiber reinforced silicon carbide composite material matrix on the workbench of the plasma spraying equipment, and clean the surface of the matrix with compressed air.

[0054] (3) Put the pure silver powder into the powder feeder of the plasma spraying equipment, set the spraying route of the manipulator, adjust the process parameters of the plasma spraying equipment, preheat the surface of the carbon fiber reinforced silicon carbide composite material substrate to be sprayed to 20°C, and then use The plasma spray gun sprays pure silver powder onto the surface of the carbon fiber reinforced silicon carbide composite material to form a pure silver conductive coating; the spraying parameters are: current 700A, voltage 30V, powder feeding rate 45g / min, main air flow 80SCFH, auxiliary air flow 30SCF...

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Abstract

The invention relates to the technical field of surface engineering, and provides a method for preparing a conductive coating on the surface of a composite material through plasma spraying. The method comprises the steps that a composite material base body is sequentially subjected to cleaning and sand blasting treatment, then the composite material base body is fixed to a workbench of plasma spraying equipment, and compressed air is adopted for cleaning the surface of the composite material base body; and the cleaned surface of the composite material base body is preheated, conductive metal powder is sprayed on the preheated surface of the composite material base body through a plasma spraying method, and the conductive coating is formed. The plasma spraying method is adopted for preparing the conductive coating on the surface of the composite material, the method is easy to operate, high in stability and controllability and suitable for spraying of large structural parts, and the prepared conductive coating is high in density, good in combination with the base body and controllable in conductivity.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a method for preparing a conductive coating on the surface of a composite material by plasma spraying. Background technique [0002] Ceramic materials have advantages such as good high temperature resistance, strong oxidation resistance, and high hardness, but they also have the disadvantage of high brittleness and cannot withstand severe mechanical impact. Adding fiber to the ceramic matrix can play a toughening role and improve its brittleness. The resulting composite material is a fiber-reinforced ceramic matrix composite material. Crack deflection occurs in the middle, while increasing strength and toughness, it can also maintain good high temperature resistance. [0003] In the fields of aerospace, ships and electronics, fiber-reinforced ceramic matrix composites are used more and more widely, and are gradually replacing traditional materials such as metals and ...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/08
CPCC23C4/134C23C4/08
Inventor 柳彦博马壮刘玲高丽红朱时珍委思豪
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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