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Preparation method of graphene modified friction material

A technology for graphene modification and friction materials, which is applied in the field of friction materials and can solve the problems of low friction performance and complicated preparation steps of friction materials

Active Publication Date: 2015-02-25
泰州龙谷信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent application 201210110949 discloses a method for preparing a C / SiC composite material, which is prepared by depositing a SiC layer, impregnating pitch, carbonizing, and vapor phase siliconizing. The preparation steps of this method are complicated
However, the friction performance of the friction material prepared by this method is not high

Method used

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  • Preparation method of graphene modified friction material

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Effect test

Embodiment 1

[0028] Preparation method of graphene-modified friction material

[0029] Step 1, disperse the mixture of graphene oxide 20Kg and carbon powder 30Kg in 200Kg water, then add nano Cu powder 30Kg, nano Si powder 50Kg, MgO powder 10Kg, mix evenly;

[0030] Step 2, after ball milling the obtained mixed material, drying to obtain a dried product;

[0031] Step 3: After pressing the dried material into a billet, sintering is carried out in a high-temperature vacuum furnace at a temperature of 1600° C. under the protection of an argon atmosphere, and the holding time is 0.5 hours to obtain a friction material.

[0032]

Embodiment 2

[0034] Preparation method of graphene-modified friction material

[0035] Step 1. Disperse the mixture of 20Kg of graphene oxide and 30Kg of carbon powder in 200Kg of water, then add 30Kg of nano-Cu powder, 50Kg of nano-Si powder, and 10Kg of MgO powder, and mix well;

[0036] Step 2, after ball milling the obtained mixed material, drying to obtain a dried product;

[0037] Step 3: After pressing the dried material into a compact, sintering is carried out in a high-temperature vacuum furnace at a temperature of 1600° C. under the protection of an argon atmosphere, and the holding time is 2 hours to obtain a friction material.

[0038]

Embodiment 3

[0040] Preparation method of graphene-modified friction material

[0041] Step 1, disperse the mixture of graphene oxide 15Kg and carbon powder 25Kg in 180Kg water, then add nano-Cu powder 25Kg, nano-Si powder 40Kg, MgO powder 70Kg, and mix well;

[0042] Step 2, after ball milling the obtained mixed material, drying to obtain a dried product;

[0043] Step 3: After pressing the dried material into a compact, sintering is carried out in a high-temperature vacuum furnace at a temperature of 1500° C. under the protection of an argon atmosphere, and the holding time is 0.1 h to obtain a friction material.

[0044] Preferably, in the first step, 4-8Kg of Ti powder is also added to the water.

[0045] Preferably, in the second step, 10-15Kg of sodium bicarbonate needs to be added to the mixed material.

[0046] Preferably, the MgO in the first step is obtained through stearic acid modification.

[0047]

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Abstract

The invention relates to a preparation method of a graphene modified friction material, and belongs to the technical field of friction materials. The method comprises the following steps: 1, dispersing 10-20 parts by weight of graphene oxide and 20-30 parts by weight of carbon powder in 160-200 parts of water, adding 15-30 parts of nano-Cu powder, 30-50 parts by weight of nano-Si powder and 5-10 parts by weight of MgO, and uniformly mixing; 2, carrying out ball milling on the mixture obtained in step 1, and drying to obtain a dried substance; and 3, compacting the dried substance to form a green body, and sintering the green body in a high temperature vacuum furnace to obtain the friction material. The friction material is modified by graphene and has good strength and friction coefficient.

Description

[0001] technical field [0002] The invention relates to a preparation method of a graphene-modified friction material, which belongs to the technical field of friction materials. [0003] Background technique [0004] Friction materials are a class of functional composite materials characterized by high friction coefficients. Modern friction materials are important materials for clutches and friction brakes in machinery, vehicles, and aviation. The function of clutch friction material and brake is transmission and braking, both of which promote two relative motions by means of frictional resistance, and can eliminate relative motion in a short time. For vehicles such as automobiles, trains, and airplanes, friction brakes are extremely critical and important structural components. [0005] Based on previous literature and reports, the functional requirements for friction materials are summarized as follows: (1) stable coefficient of dynamic and static friction; (2) relat...

Claims

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Application Information

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IPC IPC(8): C09K3/14
Inventor 张学平朱忠海
Owner 泰州龙谷信息科技有限公司
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