Preparation method of chopped carbon fiber reinforced copper-based composite material

A copper-based composite material and chopped carbon fiber technology, which is applied in the field of copper-based composite materials prepared by powder metallurgy, can solve the problems of difficult uniform mixing of chopped carbon fibers, knotting and entanglement of chopped carbon fibers, and increase the time to remove alcohol , improve the comprehensive performance, and the effect of simple process flow

Active Publication Date: 2021-06-18
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Preparation method of chopped carbon fiber reinforced copper-based composite material
  • Preparation method of chopped carbon fiber reinforced copper-based composite material
  • Preparation method of chopped carbon fiber reinforced copper-based composite material

Examples

Experimental program
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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 invention relates to a method for preparing a chopped carbon fiber reinforced copper-based composite material by utilizing a powder metallurgy method. The method is specifically implemented according to the following steps of step 1, uniformly mixing powder except chopped carbon fibers by adopting a mechanical mixing method; step 2, pretreating the chopped carbon fibers, and then conducting ultrasonic oscillation dispersion in alcohol in order to uniformly disperse the carbon fibers in the alcohol; step 3, adding the uniformly mixed powder in the step 2 into the alcohol in the step 1, and continuously stirring; then heating the mixture and continuously stirring until the alcohol is evaporated to dryness to obtain a mixed material in which the chopped carbon fibers are uniformly dispersed in the mixed powder; and step 4, preparing the mixed powder containing the short carbon fibers into the short carbon fiber reinforced copper-based composite material through a powder metallurgy technology. The method solves the problems of agglomeration and segregation of an existing 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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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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