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al 4 sic 4 Synergistically strengthened mesh/spherical copper material and preparation method with CR

A spherical, raw material technology, applied in the field of Al4SiC4 and Cr synergistically strengthened mesh/spherical copper materials and its preparation, can solve the problems of limitation of strengthening effect, achieve excellent hardness and electrical conductivity, facilitate technology promotion and large-scale production

Active Publication Date: 2017-09-19
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the equilibrium state, the alloying elements are difficult to dissolve in Cu, and the strengthening effect is limited

Method used

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  • al <sub>4</sub> sic <sub>4</sub> Synergistically strengthened mesh/spherical copper material and preparation method with CR
  • al <sub>4</sub> sic <sub>4</sub> Synergistically strengthened mesh/spherical copper material and preparation method with CR
  • al <sub>4</sub> sic <sub>4</sub> Synergistically strengthened mesh/spherical copper material and preparation method with CR

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preparation example Construction

[0026] The present invention has net / spherical features (Cu 100-x Cr x ) 100-y (Al 4SiC 4 ) y The preparation method of the material, conventional steps are as follows:

[0027] Step 1: According to (Cu 100-x Cr x ) 100-y (Al 4 SiC 4 ) y The proportion of ingredients, weighing Cu, Cr and Al with an average particle size of 10 microns and a purity of more than 99% 4 SiC 4 Powder, and weigh stearic acid equivalent to 0.1-5% of the total mass of Cu, Ti and C powder, measure ethanol according to the ratio of 0.5-5 ml per 100 grams, and prepare a ball mill mixed with stearic acid and ethanol Process control agent.

[0028] Step 2: the Al prepared in step 1 4 SiC 4 And half the mass of Cu powder, steel balls and mechanical ball milling process control agent, put them into a vacuum ball milling tank, the ball to material ratio is 8:1~40:1, then cover, vacuumize, fill with high-purity argon, and carry out high-energy mechanical ball milling , the ball milling time is 3...

Embodiment 1

[0031] (1) Cu wrapped Al 4 SiC 4 Preparation of nanocrystalline powder: based on (Cu 95 Cr 5 ) 91 (Al 4 SiC 4 ) 9 The proportion of ingredients, weighing Cu, Ti and Al with an average particle size of 10 microns and a purity of 99.5% 4 SiC 4 powder, and with stearic acid equivalent to powder gross mass 1.5% and the ethanol mixture of 3 milliliters / 100 grams as ball milling process control agent; Al 4 SiC 4 Put half of the mass of Cu powder and ball milling process control agent into a vacuum ball milling tank with a ball-to-material ratio of 15:1, then cover, vacuumize, and fill with high-purity argon for high-energy mechanical ball milling. The ball milling time is 100 hours and the ball milling speed is 100 hours. 400 rpm to obtain Cu-coated Al 4 SiC 4 highly active nanocrystalline powder.

[0032] (2) Preparation of uniform powder: the Cu package Al prepared in step 1 4 SiC 4 Nanocrystalline powder is used as a precursor material, and together with Cr powder, ...

Embodiment 3

[0051] (1) Cu wrapped Al 4 SiC 4 Preparation of nanocrystalline powder: based on (Cu 95 Cr 5 ) 84 (Al 4 SiC 4 ) 16 The proportion of ingredients, weighing Cu, Ti and Al with an average particle size of 10 microns and a purity of 99.5% 4 SiC 4 Powder, and with the ethanol mixture of stearic acid and 1 milliliter / 100 gram that is equivalent to 1.0% of powder gross mass as ball milling process control agent; Al 4 SiC 4 Put half of the mass of Cu powder and ball milling process control agent into a vacuum ball milling tank with a ball-to-material ratio of 10:1, then cover, vacuumize, and fill with high-purity argon for high-energy mechanical ball milling. The ball milling time is 72 hours and the ball milling speed 350 rpm to obtain Cu-coated Al 4 SiC 4 highly active nanocrystalline powder.

[0052] (2) Preparation of uniform powder: the Cu package Al prepared in step 1 4 SiC 4 Nanocrystalline powder is used as a precursor material, and together with Cr powder, the o...

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Abstract

The invention belongs to the field of non-ferrous metal materials, and relates to an Al4SiC4 and Cr cooperative reinforcement net-shaped / globular copper material and a preparation method thereof. Hard phase dispersion strengthening and alloy element solution strengthening principles are utilized, and mechanical ball-milling and synchronous hot pressed sintering technologies are adopted, so that a high-hardness copper-based composite material with excellent conductivity is prepared. The preparation method of the material comprises the following steps: mechanically ball-milling Cu and Al4SiC4 reactant powder in proportion to obtain nanocrystal powder; then ball-milling the nanocrystal powder, Cr powder and remaining Cu powder; and finally obtaining an Al4SiC4 enhanced copper-chromium composite material by using a synchronous hot pressed sintering technology. The Al4SiC4 and Cr cooperative reinforcement net-shaped / globular copper material has the main features that Al4sSiC4 and Cr are uniformly dispersed in a copper substrate, interfacial bonding strength of a hard phase and a copper-titanium alloy substrate is high, and the material is high in hardness and good in conductivity.

Description

technical field [0001] The invention belongs to the field of nonferrous metal materials and relates to an Al 4 SiC 4 Synergistically strengthened mesh / spheroidal copper materials with Cr and methods for their preparation. Background technique [0002] Copper has strong chemical stability, is non-magnetic, beautiful and durable, conducts electricity and heat, and is easy to weld. It is widely used in the fields of electronics, communications, home appliances, transportation and mechanical engineering, and can be used as automotive synchronizer rings and integrated circuit lead frames. , air-conditioning condenser tubes, ships and raw materials for seawater desalination devices. However, copper has the disadvantages of low strength / hardness and easy wear due to its face-centered cubic (fcc) crystal structure and many slip systems. This limits the application of copper components under heavy load conditions. Therefore, on the premise of ensuring sufficient conductivity, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05
CPCB22F2998/10C22C1/05C22C9/00C22C32/0052B22F1/0003B22F2003/145
Inventor 倪俊杰王永康刘瑞环张昊贾正锋黄宝旭马杰王长征
Owner LIAOCHENG UNIV