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A method for welding carbon fiber composite material plate and ceramic plate

A composite material and carbon fiber technology, which is applied in the field of welding carbon fiber composite material sheets and ceramic sheets, can solve the problems of poor joint strength and large joint stress, and achieve the effects of improving joint strength, realizing metallurgical connection, and improving wetting effect.

Active Publication Date: 2021-06-08
济南英维新材料科技合伙企业(有限合伙)
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of conventional brazing materials that are prone to defects, poor joint strength, and large joint stress on the welded joints of ceramics and carbon fiber composite materials, and propose a method for welding carbon fiber composite material plates and ceramic plates. The method includes The following steps: stack the carbon fiber composite material plate, nano-brazing filler metal and ceramic plate from top to bottom in sequence and assemble them under pressure to form an assembly, braze the assembly under the protection of an inert gas atmosphere with an external magnetic field, and perform heat preservation and cooling heat treatment after welding , to complete the connection of carbon fiber composite materials and ceramic plates

Method used

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Embodiment Construction

[0015] In this embodiment, the reinforced phenolic epoxy composite material T300 / 648 plate and 100*50*2mm silicon oxide ceramic plate with a size specification of 100*50*2mm are used; the specific composition of the AgCuTi solder is Ag70.5Cu27.5Ti2 solder, which comes from Changsha Maxtor Metal Materials Co., Ltd.

[0016] This embodiment includes the following steps:

[0017] S1, machining the silicon oxide ceramic plate and the reinforced phenolic epoxy composite material to obtain the plate to be welded;

[0018] S2, use 400-grit sandpaper to polish the silicon oxide ceramic plate and the reinforced phenolic epoxy composite material plate, and then put them into the acetone solution for ultrasonic cleaning for 10-15 minutes to remove surface oil and other sundries to ensure that the surface is clean;

[0019] S3, adding nano-silicon carbide particles to the AgCuTi solder, the nano-silicon carbide particles are 3%-5% of the weight of the AgCuTi solder, and performing ball m...

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Abstract

The invention belongs to the technical field of connection of dissimilar materials, and more specifically relates to a method for welding a carbon fiber composite material plate and a ceramic plate. Overlay and pressurize the assembly to form an assembly. The assembly is brazed under the protection of an inert gas atmosphere with an external magnetic field. After welding, it is heat-preserved and cooled to complete the connection between the carbon fiber composite material and the ceramic plate. The present invention firstly combines nano brazing filler metal with inert gas protection brazing with external magnetic field, which is beneficial to the formation of structures and suppression of defects in the brazing process, and obviously improves the performance of connecting joints.

Description

technical field [0001] The invention belongs to the technical field of connection of dissimilar materials, and more specifically relates to a method for welding a carbon fiber composite material plate and a ceramic plate. Background technique [0002] At present, brazing material is mainly used for ceramic connection, and there are no related reports on the connection of ceramics and carbon fiber composite materials. Brazing with conventional filler metals, the joints are prone to defects, the strength is average, and the quality of the joints is relatively poor, and the stress of the joints is relatively large. [0003] Inert gas protective brazing with nano-solder and magnetic field can make the structure of the joint more uniform. In addition, the external magnetic field can suppress the defects in the brazing process and obtain a joint with higher performance. Contents of the invention [0004] The purpose of the present invention is to overcome the shortcomings of co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
CPCC04B37/00
Inventor 戴军杨莉张尧成姜伟沈赛
Owner 济南英维新材料科技合伙企业(有限合伙)
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