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A <111> textured nano-twinned Cu bulk material and its preparation method

A technology of nano-twinned and bulk materials, applied in the field of textured nano-twinned Cu bulk materials and its preparation, high-strength nano-twinned structure copper materials and its preparation, can solve the problems of material strength reduction and achieve good plasticity, The effect of high strength and simple preparation method

Active Publication Date: 2014-10-22
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the movement ability of the grain boundary (such as grain boundary rotation, sliding, etc.) will be greatly improved, and the grain boundary movement will lead to a decrease in the strength of the material.

Method used

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  • A &lt;111&gt; textured nano-twinned Cu bulk material and its preparation method
  • A &lt;111&gt; textured nano-twinned Cu bulk material and its preparation method
  • A &lt;111&gt; textured nano-twinned Cu bulk material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of thin flake nanostructured Cu materials by electrolytic deposition

[0039] Electrolytic deposition equipment: DC stabilized voltage and stabilized current power supply;

[0040] Electrolyte requirements for electrolytic deposition: electronically pure CuSO 4 , Strictly control the content of heavy metal impurities in the electrolyte, the water used for distributing the electrolyte is high-purity deionized water (conductivity4 The concentration of the solution is 180g / L, and the acidity of the electrolyte is: pH=1;

[0041] Cathode and anode requirements: the anode is a pure copper plate with a purity higher than 99.99wt%, and the cathode is a pure titanium plate with a mechanically polished surface (industrial pure titanium, purity 99.69wt%).

[0042] In the above CuSO 4 Add the following additives to the solution:

[0043] Gelatin: 10mL / L (per liter of electrolyte), 0.2wt% gelatin aqueous solution;

[0044] High-purity NaCl: 0.5mL / L (per liter of el...

Embodiment 2

[0054] The difference from Example 1 is:

[0055] 1. Preparation of flaky nanostructure Cu materials by electrolytic deposition technology: the electrolyte is used for electronic pure grade high-purity copper sulfate CuSO 4 , add high-purity distilled water (conductivity4 The concentration of the solution is 150g / L, and the acidity is pH=1.0; cathode and anode: the anode is a pure copper plate with a purity higher than 99.99wt%, and the cathode is an iron plate coated with a Ni-P amorphous layer on the surface. The area ratio of the anode and the cathode is is 30:1;

[0056] In the above CuSO 4 Add the following additives to the solution:

[0057] Gelatin: 7.5mL / L (per liter of electrolyte), 0.2wt% gelatin aqueous solution;

[0058] High-purity NaCl: 0.5mL / L (per liter of electrolyte), 10wt% NaCl aqueous solution.

[0059] 2. Electrolysis process parameters: current density is 25.7mA / cm 2 ; The pole distance between the anode and the cathode is 100mm, the area ratio of th...

Embodiment 3

[0063] The difference from Example 1 is:

[0064] 1. Preparation of flaky nanostructure Cu materials by electrolytic deposition technology: electronically pure copper sulfate CuSO for electrolyte 4 , CuSO 4 The concentration of the solution is 200g / L, add high-purity distilled water (conductivity<0.1μm / cm), and the acidity is pH=1.1; cathode and anode: the anode is a pure copper plate with a purity higher than 99.99wt%, and the cathode is coated with Ni on the surface -Low carbon steel plate with P amorphous layer, the area ratio of anode and cathode is 10:1;

[0065] In the above CuSO 4 Add the following additives to the solution:

[0066] Gelatin: 5mL / L (per liter of electrolyte), 0.2wt% gelatin aqueous solution;

[0067] High-purity NaCl: 0.5mL / L (per liter of electrolyte), 10wt% NaCl aqueous solution.

[0068] 2. Electrolysis process parameters: current density is 17.1A / cm 2 , the electrolysis temperature is 18°C, the electrolyte is stirred by circulating water, and ...

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Abstract

The invention belongs to the field of nano-structured metal materials, and specifically related to an (111) texture nano-grade twin crystal Cu block material and a preparation method thereof. The microstructure of the material is composed of columnar crystal grains with sizes of 1-50 micrometers. High-density nano-grade twin crystal lamellar structures are uniformly distributed in the crystal grains. The thicknesses of the twin crystal lamellar structures are 30 nanometers to hundreds of nanometers. The structural characteristics of the material are that: the materials have an (111) texture, columnar crystal grains, and low-angle boundaries; the nano-grade twin crystal lamellar structures and sigma3 coherent twin crystal interfaces are perpendicular to a growth direction; the grain sizes and twin crystal lamellar structures can grow under control; and the strength of the blocks can reach 10 times that of macro-crystal Cu. According to the invention, a direct current electrodeposition technology is adopted, and the technological conditions are slightly changed, wherein an appropriate plating bath composition and appropriate deposition parameters are controlled. According to the invention, performance problems of Cu materials in prior arts can be solved, and a Cu material with excellent performance, high strength, high thermal stability, high conductivity and high plasticity can be obtained.

Description

technical field [0001] The invention relates to the field of nano-structured metal materials, in particular to a high-strength nano-twin structure copper material and a preparation method, in particular to a <111> textured nano-twin Cu block material and a preparation method. Background technique [0002] Copper is the earliest metal used by humans, and the Egyptians used copper as early as 6,000 years ago. Copper has many excellent characteristics and wonderful functions: good electrical conductivity and thermal conductivity; good corrosion resistance in the atmosphere, sea water and many media; good plasticity and wear resistance; good processing, casting, welding, easy Cutting and other technological properties are indispensable metal materials in industrial sectors such as electric power, electrical engineering, thermal engineering, chemical industry, instrumentation, shipbuilding and machinery manufacturing. With the development of human civilization, new uses ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/38
Inventor 金帅尤泽升卢磊
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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