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
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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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