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A kind of preparation method of chopped carbon fiber reinforced copper matrix composite material

A technology for copper-based composite materials and chopped carbon fibers, which is applied in the field of preparing copper-based composite materials by powder metallurgy, can solve the problems that chopped carbon fibers are difficult to mix and mix uniformly, and chopped carbon fibers are knotted and entangled, so as to increase the alcohol removal time. , Improve the overall performance, the effect of simple process

Active Publication Date: 2022-03-22
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the existing chopped carbon fiber reinforced copper matrix composites, it is difficult to mix the chopped carbon fibers uniformly, and the problems of knotting and entanglement of the chopped carbon fibers during the mixing process (such as figure 2 shown), the invention provides a method for preparing a chopped carbon fiber reinforced copper matrix composite

Method used

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  • A kind of preparation method of chopped carbon fiber reinforced copper matrix composite material
  • A kind of preparation method of chopped carbon fiber reinforced copper matrix composite material
  • A kind of preparation method of chopped carbon fiber reinforced copper matrix composite material

Examples

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Embodiment 1

[0032] This example takes the production of chopped carbon fiber reinforced copper-based friction material as an example. The composite material contains the following components: reduced copper powder 55wt%, iron powder 15wt%, chromium iron powder 14wt%, tin powder 5wt%, 2mm Chopped carbon fiber 0.2wt%, the rest is molybdenum disulfide and graphite.

[0033] The preparation method of the chopped carbon fiber reinforced copper-based friction material is as follows:

[0034] First, the preparation of composite material powder: Weigh all the powder raw materials except chopped carbon fiber into a V-type mixer, mix at a speed of 50r / min for 5h to obtain a primary mixed powder; after ultrasonically dispersing the chopped carbon fiber Carry out electroless copper plating, then add alcohol at a ratio of 1:1200, and use 40kHZ ultrasonic vibration to disperse for three minutes, so that the chopped carbon fibers are evenly dispersed in the alcohol, such as image 3 shown. Put the alc...

Embodiment 2

[0038] This example takes the production of chopped carbon fiber reinforced copper-based friction material as an example. The composite material contains the following components: 55 wt% reduced copper powder, 15 wt% iron powder, 14 wt% ferrochrome powder, 5 wt% tin powder, 1 Millimeter chopped carbon fiber 0.4wt%, the rest is molybdenum disulfide and graphite.

[0039] The preparation method of the chopped carbon fiber reinforced copper-based friction material is as follows:

[0040] First, the preparation of composite material powder: Weigh all the powder raw materials except chopped carbon fiber into a V-type mixer, mix at a speed of 50r / min for 5h to obtain a primary mixed powder; after ultrasonically dispersing the chopped carbon fiber Carry out electroless copper plating, then add alcohol at a ratio of 1:1200, and use 40kHZ ultrasonic vibration to disperse for three minutes, so that the chopped carbon fibers are evenly dispersed in the alcohol, such as image 3 shown. ...

Embodiment 3

[0044] This example takes the production of chopped carbon fiber reinforced copper-based friction material as an example. The composite material contains the following components: reduced copper powder 49.8wt%, iron powder 16wt%, chromium iron powder 18wt%, tin powder 5wt%, 0.1 Millimeter chopped carbon fiber 0.2wt%, the rest is molybdenum disulfide and graphite.

[0045] The preparation method of the chopped carbon fiber reinforced copper-based friction material is as follows:

[0046] First, the preparation of composite material powder: Weigh all the powder materials except chopped carbon fiber into a V-shaped mixer, mix at a speed of 50r / min for 4h to obtain primary mixed powder; after ultrasonically dispersing the chopped carbon fiber Carry out high-temperature degumming, then add alcohol at a ratio of 1:800, and use 40kHZ ultrasonic vibration to disperse for three minutes, so that the chopped carbon fibers are evenly dispersed in the alcohol, such as image 3 shown. Put...

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Abstract

The present invention relates to a method for preparing chopped carbon fiber reinforced copper-based composite materials by powder metallurgy, which is specifically implemented according to the following steps: step 1, using mechanical mixing to mix powders except chopped carbon fibers evenly; step 2, After the chopped carbon fiber is pretreated, it is dispersed by ultrasonic vibration in alcohol, so that the carbon fiber is evenly dispersed in the alcohol; step 3, the powder mixed evenly in step 2 is added to the alcohol in step 1, and continuously stirred; then Heat the above mixture while continuing to stir until the alcohol is evaporated to dryness to obtain a mixture in which chopped carbon fibers are evenly dispersed in the mixed powder; step 4, the above mixed powder containing chopped carbon fibers is prepared into chopped carbon fiber reinforced copper by powder metallurgy. base composite material. The invention solves the problem of agglomeration and segregation of the current chopped carbon fiber reinforced copper-based composite material.

Description

technical field [0001] The invention belongs to the technology of preparing copper-based composite materials by powder metallurgy, in particular to a preparation method of chopped carbon fiber reinforced copper-based composite materials. Background technique [0002] Carbon fiber-reinforced copper-based composites combine the excellent properties of copper-based composites and carbon fibers to have good friction and wear properties, electrical and thermal conductivity, high specific strength, specific modulus, and low thermal expansion. However, the density difference between carbon fiber and copper powder is relatively large (about 4.5 times), and segregation is prone to occur during powder mixing. During the powder mixing process, chopped carbon fibers will entangle and knot each other after vibration and friction, showing spherical and flocculent segregation (Such as figure 1 shown), therefore, it is difficult to uniformly mix chopped carbon fibers into the powder by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/14C22C49/02C22C49/14C22C101/10
CPCC22C47/14C22C49/02C22C49/14
Inventor 樊江磊贾旭钢王艳周向葵吴深李莹刘建秀
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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