A liquid-liquid doped rare earth oxide copper-based composite material and its preparation method

A technology of copper-based composite materials and rare earth oxides, which is applied in the field of liquid-liquid doped rare earth oxide copper-based composite materials and its preparation, can solve the problems of rare earth oxide dispersion-strengthened copper alloys that do not meet the requirements of deep processing of deformation and particle/matrix interface detachment. Sticking, accelerating the failure process and other problems, to avoid further grain growth, not easy to debond at the interface, not easy to break the effect

Active Publication Date: 2019-05-24
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the particle size of rare earth oxides is large, and high stress / strain concentration can easily cause particle / matrix interface debonding and particle rupture, further accelerating the failure process
The above factors lead to the plasticity of rare earth oxide dispersion strengthened copper alloys prepared by ordinary powder metallurgy still not meeting the needs of deformation and deep processing

Method used

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  • A liquid-liquid doped rare earth oxide copper-based composite material and its preparation method

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Effect test

Embodiment 1

[0029] A liquid-liquid doped rare earth oxide copper-based composite material, comprising the following components in weight percentage: 0.5% La 2 o 3 , and the balance is copper and unavoidable impurities.

[0030] Rare earth oxide (La 2 o 3 ) is 0.5% by mass.

[0031] 1) dissolving rare earth lanthanum nitrate in water, mixing with ammonium cuprate solution, adjusting the pH value to 8, and obtaining a mixture containing rare earth lanthanum ammonium cuprate sol after stirring evenly;

[0032] 2) Add citric acid to the mixture of rare earth-containing lanthanum ammonium cuprate sol prepared in step 1) for hydrothermal synthesis reaction at a temperature of 150°C, filter in alcohol and deionized water after cooling, and vacuum dry at 180°C Dry in the oven for 10 hours to obtain rare earth ammonium lanthanum cuprate powder;

[0033] 3) Calcining the rare earth ammonium lanthanum cuprate powder obtained in step 2) at 560° C. for 6 hours to obtain rare earth lanthanum doped...

Embodiment 2

[0039] A liquid-liquid doped rare earth oxide copper-based composite material, comprising the following components in weight percentage: 1.3% Ce 2 o 3 , and the balance is copper and unavoidable impurities.

[0040] Rare earth oxide (Ce 2 o 3 ) is 1.3% by mass.

[0041] 1) dissolving rare earth cerium nitrate in water, mixing with ammonium cuprate solution, adjusting the pH value to 8.5, and obtaining a mixture containing rare earth cerium ammonium cuprate sol after stirring evenly;

[0042] 2) Add citric acid to the mixture of ammonium cuprate sol containing rare earth cerium prepared in step 1) to carry out hydrothermal synthesis reaction at a temperature of 170°C, filter in alcohol and deionized water after cooling, and vacuum dry at 200°C Dry in the oven for 10 hours to obtain rare earth ammonium cerium cuprate powder;

[0043] 3) Calcining the rare earth ammonium cerium cuprate powder obtained in step 2) at 580° C. for 6 hours to obtain rare earth cerium-doped copper...

Embodiment 3

[0049] A liquid-liquid doped rare earth oxide copper-based composite material, comprising the following components in weight percentage: 2.5% Y 2 o 3 , and the balance is copper and unavoidable impurities.

[0050] Rare earth oxide (Y 2 o 3 ) is 2.5% by mass.

[0051] 1) dissolving rare earth yttrium nitrate in water, mixing with ammonium cuprate solution, adjusting the pH value to 8.3, and obtaining a mixture containing rare earth yttrium ammonium cuprate sol after stirring evenly;

[0052] 2) Add citric acid to the mixture of rare earth-containing ammonium yttrium cuprate sol prepared in step 1) to carry out hydrothermal synthesis reaction at a temperature of 180°C, filter in alcohol and deionized water after cooling, and vacuum-dry at 200°C Dry in the oven for 8 hours to obtain rare earth ammonium yttrium cuprate powder;

[0053] 3) Calcining the rare earth ammonium yttrium cuprate powder obtained in step 2) at 600° C. for 6 hours to obtain rare earth yttrium-doped cop...

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Abstract

The invention discloses a liquid-liquid doped rare earth oxide copper-based composite material and a preparation method thereof. The composite material comprises 0.5%-4% of rare earth oxides and the balance copper and inevitable impurities. In the liquid-liquid doping process, rare earth nitrate and copper acid ammonium are subjected to liquid-liquid mixing; then, a mixture solution is evaporative-crystallized and dried, and thus rare earth keto acid ammonium crystalline powder is obtained; and the rare earth keto acid ammonium crystalline powder is roasted, doped with copper powder, reduced, pressed and sintered, and the intracrystalline-distribution rare earth oxide copper-based material is obtained. The majority of rare earth oxide particles can be located inside copper powder crystal grains, and the minority of the earth oxide particles are distributed on the crystal boundary. The prepared rare earth oxide copper-based composite material is good in wettability, high in density, high in strength, excellent in conductivity and good in machining performance, and the process is simple, easy to operate and high in application.

Description

technical field [0001] The invention relates to the technical field of copper-based composite materials, in particular to a liquid-liquid doped rare earth oxide copper-based composite material and a preparation method thereof. Background technique [0002] With the development of modernization, pure copper products can no longer meet the needs of modern development, and high-performance copper alloys need to be prepared. Adding rare earth elements to copper can not only increase the recrystallization temperature and room temperature creep resistance of copper alloys, but also significantly reduce the plastic-brittle transition temperature of copper and increase the elongation. Due to the stable thermodynamic properties of rare earth oxides, rare earth doped copper alloys are not only commonly used as high-temperature structural materials, but also widely used in functional materials, which can be applied in: ① vacuum contact materials; ② conductive elastic materials and inte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05B22F9/22
CPCB22F9/22B22F2998/10B22F2999/00C22C1/05C22C9/00C22C32/0021B22F3/04B22F3/101B22F2201/013B22F2201/20
Inventor 肖翔鹏田原晨陈金水李学帅许海朱清涛郑朋艳田英明
Owner JIANGXI UNIV OF SCI & TECH
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