Pretreatment method before thermal spraying of protective coating on surface of polyamide resin matrix composite

A polyamide resin and composite material technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of delamination failure, low bonding force, difficult deposition of coating materials, etc., to overcome thermal damage , the effect of avoiding deformation and delamination failure

Inactive Publication Date: 2018-08-07
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the prior art, thermal spraying protective coatings on the surface of polyamide resin-based composite materials are prone to the technical problems of difficult deposition of coating materials, low bonding force, easy peeling off, and delamination failure due to thermal damage from spraying heat sources , in order to solve this problem, the present

Method used

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  • Pretreatment method before thermal spraying of protective coating on surface of polyamide resin matrix composite
  • Pretreatment method before thermal spraying of protective coating on surface of polyamide resin matrix composite
  • Pretreatment method before thermal spraying of protective coating on surface of polyamide resin matrix composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] The powder material in this test is ZrO 2 24CeO 2 2.5Y 2 o 3 (Powder strength -125 +11μm, low thermal conductivity, excellent impact resistance), the process is plasma spraying, the thickness of the surface layer is 700μm.

[0039] Its technological process is:

[0040] (1) Cleaning of matrix samples;

[0041] (2) Laser etching processing;

[0042] Laser etching parameters: (nanosecond laser is used in this experiment)

[0043] Etching power test range (0.2~9W)

[0044] (3) Heating the Al powder to remove moisture;

[0045] (4) Add spray powder material to the powder feeder;

[0046] (5) Place the sample, adjust the compound spraying distance, determine the cold spraying parameters, and write the manipulator spraying program.

[0047] (6) Turn on the cold spray equipment, turn on the powder feeder, run the manipulator program, and start spraying. After the coating is prepared, close the powder feeder and turn off the cold spray equipment. The cold spraying p...

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Abstract

The invention relates to a pretreatment method before thermal spraying of a protective coating on the surface of a polyamide resin matrix composite. Through the pretreatment technology of combining resin matrix composite surface modeling and metal (or alloy) bottom layer priming, effective deposition of protective facing particles is achieved, and bonding force between the coating and a matrix isgreatly increased, wherein surface modeling adopts the laser etching technology, and a used tool is a nanosecond or picosecond pulse laser; and bottom layer priming adopts the cold spraying technology, and a used material is metal or alloy powder such as the Al powder or the Cu powder. After the pretreatment technology, the bonding strength and the heat-shock-resisting cycling capacity between theprotective coating and the matrix are both greatly improved.

Description

technical field [0001] The invention relates to a pretreatment method before thermal spraying protective coating on the surface of a polyamide resin-based composite material, and belongs to the technical field of surface engineering. Background technique [0002] Polyamide resin-based composite materials have the advantages of high specific strength, low friction coefficient, good fatigue and corrosion resistance, and strong noise resistance. and other parts are widely used. It not only meets the weight reduction requirements of the new generation of aviation combat aircraft, but also greatly reduces the cost. [0003] However, the current normal working temperature of polyamide resin-based composite materials is below 350°C. When tempering occurs and the internal temperature suddenly rises to 600°C or even 800°C, the composite material will be ablated and burned in a short time, resulting in failure. Therefore, the anti-ablation protection of polyamide resin matrix compos...

Claims

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Application Information

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IPC IPC(8): C23C4/02C23C24/04C23C4/11C23C28/00
CPCC23C4/02C23C24/04C23C28/322C23C28/345
Inventor 李淑青马国佳李其连
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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