One-step synthesis method of ultrafine zirconium carbide-zirconium boride ceramic composite strengthened copper electrode material

A technology of ceramic composite and electrode material, which is applied in the field of preparation of copper-based composite materials for welding electrodes, can solve the problems of high price of ultrafine zirconium carbide-zirconium boride powder, etc., and achieves low cost, low price and low porosity. Effect

Active Publication Date: 2018-09-07
TAIZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above-mentioned technical problems in the prior art, the present invention provides a one-step synthesis method of ultrafine zirconium carbide-zirconium boride ceramic composite reinforced copper electrode material, which can improve its mechanical properties while maintaining the excellent electrical conductivity of copper, and at the same time It can effectively solve the problem of high price of ultrafine zirconium carbide-zirconium boride powder. The method also has the advantages of simple process, simple operation, high production efficiency, ZrC-ZrB 2 The advantages of small size and uniform distribution

Method used

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Examples

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Effect test

Embodiment 1

[0032] One-step synthesis method of zirconium carbide-zirconium boride ceramic composite reinforced copper electrode material:

[0033] 1. Weighing: Cu powder with a particle size of ~0.5 μm, Zr powder with a particle size of ~45 μm, and B powder with a particle size of ~0.5 μm 4 C powder weighs the raw materials according to the molar ratio of 3.42:3:1, and the raw materials used are all commercial powders.

[0034] 2. Mixing: Mix the weighed Cu powder, Zr powder, B 4 C powder, as well as balls and milling jars are placed in a vacuum glove box, and after vacuuming to 5-10Pa, argon gas is flushed to normal pressure, and balls and powder are put into a ball milling jar in an inert gas environment, and then The sealed ball mill jar was put into the roller ball mill and mixed for 12 hours to obtain Cu-Zr-B 4 C mixed powder, wherein, the ball is ZrO 2 Grinding balls, the weight ratio of grinding balls to powder is 10:1, and the rotating speed of the ball mill is 60 rpm;

[003...

Embodiment 2

[0040] The one-step synthesis method of zirconium carbide-zirconium boride ceramic composite reinforced copper electrode material is the same as that of Example 1 except for the following.

[0041] In this example:

[0042] (1) Cu-Zr-B 4 C mixed powder Cu powder, Zr powder, B 4 C powder is weighed at a molar ratio of 1.28:3:1;

[0043] (2) Oxygen-free copper block and Cu-Zr-B 4 C powder compacts are placed in a vacuum melting furnace at a weight ratio of 399:1;

[0044] (3) The time of heat preservation and magnetic stirring is 30min;

[0045] (4) A zirconium carbide-zirconium boride ceramic composite reinforced copper electrode material with a content of 0.2 wt.% is obtained. The composite has a tensile strength of 287MPa and an electrical conductivity of 87% IACS.

[0046] figure 1 Microstructure of 0.2wt.% zirconium carbide-zirconium boride ceramic composite strengthened copper electrode material after corrosion. Depend on figure 1 .a It can be seen that ultrafine ...

Embodiment 3

[0048] The one-step synthesis method of zirconium carbide-zirconium boride ceramic composite reinforced copper electrode material is the same as that of Example 1 except for the following.

[0049] In this example:

[0050] (1) Cu-Zr-B 4 The particle size of Cu powder in C mixed powder is 75 μm;

[0051] (2) Oxygen-free copper block and Cu-Zr-B 4 C powder compacts are placed in a vacuum melting furnace at a weight ratio of 59:1;

[0052] (3) The time of heat preservation and magnetic stirring is 30min, and the magnetic stirring current is 50A;

[0053] (4) A zirconium carbide-zirconium boride ceramic composite strengthened copper electrode material with a content of 1.0 wt.% is obtained. The composite has a tensile strength of 385 MPa and an electrical conductivity of 82% IACS.

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Abstract

The invention belongs to the field of preparation of copper-based composite materials for welding electrodes, and discloses a one-step synthesis method of an ultrafine zirconium carbide-zirconium boride ceramic composite strengthened copper electrode material, wherein the method comprises the steps: carrying out cold pressing of a uniformly mixed Cu powder, Zr powder and B4C powder into a prefabricated block, and then putting the Cu-Zr-B4C powder press blank and oxygen-free copper into a vacuum induction smelting furnace, pre-heating to promote a thermal detonation synthesis reaction of the press blank, then heating up to make oxygen-free copper molten, wrapping a reaction product, carrying out heat preservation, and stirring to prepare the zirconium carbide-zirconium boride ceramic reinforced copper-based composite material. The ultrafine zirconium carbide-zirconium boride ceramic composite strengthened copper electrode material is synthesized in one step, the production cost is reduced, the working procedures are simplified and the production efficiency is improved. At the same time, the ZrC-ZrB2 ceramic has small size, and uniform distribution is achieved in copper.

Description

technical field [0001] The invention belongs to the field of preparation of copper-based composite materials for welding electrodes, and is mainly used for welding machine electrode heads, electrode caps, etc., and specifically relates to a one-step synthesis method of ultrafine zirconium carbide-zirconium boride ceramic composite reinforced copper electrode materials. Background technique [0002] Spot welding is widely used in industries such as automobile, instrumentation and aviation manufacturing. Because it is often subjected to high temperature and high pressure during service, copper alloy electrodes are prone to failure, which reduces production efficiency and affects the quality of solder joints. With the widespread use of automatic welding and welding robots in modern production, there is an urgent need to develop electrode materials with both excellent electrical conductivity and mechanical properties. One of the effective ways to solve the insufficient propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/10
CPCC22C1/1036C22C9/00C22C32/0047C22C1/1052
Inventor 张梦贤霍颜秋赵先锐方一航姚海龙王洪涛陈清宇白小波王天乐
Owner TAIZHOU UNIV
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