CN-122012968-A - Preparation method of rare earth yttrium-neodymium co-doped reinforced copper-based composite material

Abstract

A method for preparing rare earth yttrium-neodymium co-doped reinforced copper-based composite material comprises a, providing copper powder, titanium carbide powder, yttrium powder and neodymium powder; mixing the following components, by mass, 95.0-98.5% of copper powder, 1.0-3.0% of titanium carbide powder, 0.2-1.0% of yttrium powder and 0.3-1.0% of neodymium powder, wherein the sum of the contents of the components is 100%, C, carrying out mechanical alloying pretreatment on the mixed powder obtained in the step b, d, placing the pretreated composite powder in a microwave sintering furnace, carrying out microwave sintering at the temperature of 750-850 ℃ and the pressure of 20-35 MPa under the protection atmosphere or vacuum, preserving heat for 10-30 minutes, and then cooling to obtain the copper-based composite material. The method aims to prepare the copper-based composite material with high strength, high conductivity and excellent wear resistance by constructing a Y-Nd synergistic modification and titanium carbide TiC-rare earth oxide double-phase dispersion strengthening system and combining a microwave-assisted low-temperature sintering process.

Inventors

• CHENG CHUANHUI
• GAO YONG
• FU SHENGJUN
• ZENG HUARONG
• MAO XIANYIN
• CHEN PEILONG
• XU KUI
• YANG QI
• HUANG HUAN
• NIU WEI
• XING YI
• ZHOU KUN
• LI XIN
• Ouyang Zeyu
• Ning Haobai
• LIU JUN
• XU SHURONG
• ZHUO RAN
• LI KUN
• HUANG ZHIMING
• LUO YAN

Assignees

• 南方电网科学研究院有限责任公司
• 贵州电网有限责任公司

Dates

Publication Date

20260512

Application Date

20251128

Claims (5)

1. 1. The preparation method of the rare earth yttrium-neodymium co-doped reinforced copper-based composite material is characterized by comprising the following steps of: a. providing copper powder, titanium carbide powder, yttrium powder and neodymium powder; b. Mixing, by mass, 95.0-98.5% of copper powder, 1.0-3.0% of titanium carbide powder, 0.2-1.0% of yttrium powder, 0.3-1.0% of neodymium powder, and 100% of the total content of the components; c. carrying out mechanical alloying pretreatment on the mixed powder in the step b; d. And (3) placing the pretreated composite powder in a microwave sintering furnace, performing microwave sintering at the temperature of 750-850 ℃ and the pressure of 20-35 MPa under the protection atmosphere or vacuum, preserving heat for 10-30 minutes, and then cooling to obtain the copper-based composite material.
2. 2. The method for preparing the rare earth yttrium-neodymium co-doped reinforced copper-based composite material according to claim 1, wherein the mechanical alloying pretreatment in the step c is performed in a planetary ball mill under the protection of high-purity argon, the ball-to-material ratio is 10:1-15:1, the rotating speed is 200-350 rpm, and the ball milling time is 2-6 hours.
3. 3. The method for preparing a rare earth yttrium-neodymium co-doped reinforced copper-based composite material according to claim 1, wherein the temperature rising rate of the microwave sintering in the step d is 50-100 ℃ per minute.
4. 4. A rare earth Y-Nd co-doped enhanced microwave-assisted low temperature sintered copper-based composite material prepared by the method of any one of claims 1-3, wherein the matrix is copper and the enhanced phase comprises titanium carbide, in situ generated Y 2 O 3 and Nd 2 O 3 nanoparticles; The Y 2 O 3 and Nd 2 O 3 nano particles are dispersed and distributed in the copper matrix and on the interface between titanium carbide and the copper matrix.
5. 5. The copper-based composite according to claim 4, wherein the conductivity is not less than 76% IACS and the Vickers hardness is not less than 150 HV.

Description

Preparation method of rare earth yttrium-neodymium co-doped reinforced copper-based composite material Technical Field The invention relates to the field of materials, in particular to a preparation method of a rare earth yttrium-neodymium co-doped reinforced copper-based composite material. Background Copper-based composite materials are key base materials for supporting the development of industries such as power transmission, intelligent manufacturing and the like. Along with the upgrade of high-end equipment to high power, miniaturization and long service life, the requirements on the comprehensive performance of copper-based materials are more severe, and the application scene of the copper-based materials is extended to the field of high-end equipment with high-frequency friction and high-temperature working conditions, so that the performance short plates of the existing materials are further highlighted. In the prior art, various schemes such as rare earth doping modification and high-temperature sintering forming are explored in the industry for improving the performance of copper-based materials, wherein a single rare earth doping technology can pertinently improve the strength or conductivity of the materials, but two core performances are difficult to achieve, and a high-temperature sintering process (with the conventional temperature of 950-1100 ℃) is a main flow forming mode, so that the densification of the materials can be primarily realized, but the problems of high energy consumption, easily coarse grains and difficult breakthrough of the compactness of 92% exist. The main problems are that the core pain point is concentrated in three aspects, the inherent contradiction exists between the strength and the conductivity, the single modification means can not be cooperatively lifted, the high-temperature sintering energy consumption is more than 30% of the total preparation cost, the grains are coarse and further deteriorate the conductivity, the wear resistance is generally insufficient, the wear rate is high in high-frequency friction scenes such as motor brushes, conductive terminals and the like, and the service life can only meet the requirements of middle-low-end equipment. In the prior art, a preparation scheme capable of simultaneously breaking the three problems does not appear, so that the copper-based material is difficult to adapt to the severe requirements of high-end equipment, and becomes a key bottleneck for restricting the large-scale application of the copper-based material in the high-end field. Disclosure of Invention Aiming at the defects, the invention aims to provide a rare earth yttrium-neodymium (rare earth Y-Nd) co-doped enhanced microwave-assisted low-temperature sintering copper-based composite material and a preparation method thereof. The method aims to prepare the copper-based composite material with high strength, high conductivity and excellent wear resistance by constructing a Y-Nd synergistic modification and titanium carbide TiC-rare earth oxide double-phase dispersion strengthening system and combining a microwave-assisted low-temperature sintering process. To achieve the purpose, the invention adopts the following technical scheme: the preparation method of the rare earth yttrium-neodymium co-doped reinforced copper-based composite material comprises the following steps: a. providing copper powder, titanium carbide powder, yttrium powder and neodymium powder; b. Mixing, by mass, 95.0-98.5% of copper powder, 1.0-3.0% of titanium carbide powder, 0.2-1.0% of yttrium powder, 0.3-1.0% of neodymium powder, and 100% of the total content of the components; c. carrying out mechanical alloying pretreatment on the mixed powder in the step b; d. And (3) placing the pretreated composite powder in a microwave sintering furnace, performing microwave sintering at the temperature of 750-850 ℃ and the pressure of 20-35 MPa under the protection atmosphere or vacuum, preserving heat for 10-30 minutes, and then cooling to obtain the copper-based composite material. . Preferably, the mechanical alloying pretreatment in the step c is performed in a planetary ball mill under the protection of high-purity argon, the ball-material ratio is 10:1-15:1, the rotating speed is 200-350 rpm, and the ball milling time is 2-6 hours. Preferably, the temperature rising rate of the microwave sintering in the step d is 50-100 ℃ per minute. The rare earth Y-Nd co-doped reinforced microwave-assisted low-temperature sintering copper-based composite material prepared by the preparation method of the rare earth Y-Nd co-doped reinforced copper-based composite material is characterized in that a matrix is copper, and a reinforced phase comprises titanium carbide, in-situ generated Y 2O3 and Nd 2O3 nano particles; The Y 2O3 and Nd 2O3 nano particles are dispersed and distributed in the copper matrix and on the interface between titanium carbide and the copper matrix. Preferably, the conductivity is gr