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Low-pressure auxiliary infiltration preparation method for high volume fraction C/Cu composite material

A high volume fraction, composite material technology, applied in the field of materials, can solve the problems of inability to prepare high volume fraction, bulky and bulky equipment, high material cost, and achieve the effects of fast infiltration rate, small damage and improved wettability

Inactive Publication Date: 2009-09-09
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the inability to prepare high volume fraction C / Cu composite materials in the prior art, and the shortcomings of bulky and heavy equipment, complicated process, high material cost and poor electrical conductivity when using traditional preparation methods, the present invention proposes a Low pressure assisted preparation method of high content C / Cu composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Preparation of prefabricated body: Mix short carbon fibers with an average length of 2 mm and phenolic resin alcohol solution with a concentration of 23.8 g / L at a ratio of 0.15 g / ml, and cold isostatically press for prefabrication under a pressure of 0.2 MPa. After standing in the air to dry, and then put into the flowing Ar 2 Heating to 1200°C in a protected heat treatment furnace at a heating rate of 100°C / h for 30 minutes for carbonization, and then cooling to room temperature to obtain a carbonized porous preform and weighing G. The volume fraction of the pores of the preform is calculated by using the volume fraction Ψ=1-(G / ρV), where ρ is the density of the carbon fiber, V is the volume of the preform, and the calculated volume fraction of the pores is about 50%.

[0022] b. Alloy smelting, according to the alloy ratio of Ti 1%, Sn 5%, Cr 5%, and the balance is copper, smelting into alloy ingots in an electric arc melting furnace.

[0023] c. Put the prefabri...

Embodiment 2

[0027] a. Preparation of prefabricated body: Mix short carbon fibers with an average length of 2mm and phenolic resin alcohol solution with a concentration of 23.8g / L at a ratio of 0.18g / ml, and cold isostatically press for prefabrication under a pressure of 0.3MPa. After standing in the air to dry, and then put into the flowing Ar 2 Heating to 1200°C in a protected heat treatment furnace at a heating rate of 100°C / h for 30 minutes for carbonization, and then cooling to room temperature to obtain a carbonized porous preform and weighing G. The volume fraction of the pores of the preform is calculated by using the volume fraction Ψ=1-(G / ρV), where ρ is the density of the carbon fiber, V is the volume of the preform, and the calculated volume fraction of the pores is about 38%.

[0028] b. Alloy smelting, according to the alloy ratio of Ti 6%, Sn 8.5%, Cr 3.5%, and the balance is Cu, smelting into alloy ingots in an electric arc melting furnace.

[0029] c. Put the prefabricated ...

Embodiment 3

[0033] a. Preparation of prefabricated body: Mix short carbon fibers with an average length of 2mm and phenolic resin alcohol solution with a concentration of 23.8g / L at a ratio of 0.2g / ml, and cold isostatically press for prefabrication under a pressure of 0.35MPa. After standing in the air to dry, and then put into the flowing Ar 2 Heating to 1200°C in a protected heat treatment furnace at a heating rate of 100°C / h for 30 minutes for carbonization, and then cooling to room temperature to obtain a carbonized porous preform and weighing G. The volume fraction of the pores of the preform is calculated by using the volume fraction Ψ=1-(G / ρV), where ρ is the density of the carbon fiber, V is the volume of the preform, and the calculated volume fraction of the pores is about 31%.

[0034] b. Alloy smelting, according to the alloy ratio of Ti 8%, Sn 13%, Cr 1.6%, and the balance is Cu, smelting into alloy ingots in an electric arc melting furnace.

[0035] c. Put the prefabricated...

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Abstract

The invention relates to a low-pressure auxiliary infiltration preparation method for a high volume fraction C / Cu composite material, which adopts a copper-based composite material and comprises the following steps: short carbon fiber and phenolic resin alcoholic solution are evenly mixed, prefabricated and formed by isostatic cool pressing, and persevere heat and are carbonized under the protection of Ar2; 1-10 percent of Ti, 1-10 percent of Sn, 1-5 percent of Cr, the balanced Cu are added into the carbonized short carbon fiber and phenolic resin alcoholic solution; and alloy pigs are obtained by melting; the alloy pigs are put on a prefabricated part according to a proportion of 4:1 of alloy pig to carbon fiber, pumped to be vacuum in an infiltration furnace and heated to be at infiltration temperature, Ar2 is charged and heat is preserved, infiltration is carried out under the condition of pressure maintaining, and a high content C / Cu composite material is obtained. The invention effectively increases the wetting property, reduces the reaction between alloy liquid and fiber, obtains the C / Cu composite material with high carbon volume fraction of 50-70 percent, decreases the damage to the prefabricated part by surface reaction, and simplifies the preparation process of the C / Cu composite material with high carbon volume fraction.

Description

1. Technical field [0001] The invention relates to the field of materials, and relates to a low-pressure assisted infiltration preparation method of a C / Cu composite material with a high carbon volume fraction. 2. Background technology [0002] C / Cu composite materials are widely used due to their good electrical conductivity, thermal conductivity and wear resistance. Among them, C (diamond) / Cu composite materials have long been used to manufacture diamond tools, while C (graphite) / Cu composite materials are widely used For collector brushes and arc contacts in some low-voltage switches, the new C (carbon fiber) / Cu composite material is also expected to be used in current-carrying components such as electric locomotive pantograph slides. However, due to the wetting angle of various types of carbon and copper and copper alloy melt at high temperature is about 136-170°, the wettability is extremely poor. As a result, the interface compatibility of the C / Cu composite material ...

Claims

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Application Information

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IPC IPC(8): C22C47/00C22C101/10
Inventor 胡锐寇宏超李海涛常辉李宏伟薛祥义李金山
Owner NORTHWESTERN POLYTECHNICAL UNIV
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