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Method for preparing (TiB2+TiC) dispersion-strengthening copper-based composites by adopting self-propagating high-temperature synthesis

A copper-based composite material, self-propagating high-temperature technology, applied in the field of metal-based composite material preparation, can solve the problems of multiple preparation processes, complex preparation processes, and high production costs

Inactive Publication Date: 2010-07-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TiB 2 and the preparation process of TiC ultrafine powder is relatively complicated, resulting in (TiB 2 +TiC) dispersion-strengthened metal matrix composites have more preparation procedures and higher production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: be 150 orders with particle size, the Cu powder that purity is 99.9%, Ti powder and B 4 C powder is used as raw material, a certain amount of Cu powder, Ti powder and B 4 C powder (Cu powder and Ti+B 4 The mass ratio of C powder is 50:50, wherein Ti powder and B 4 The molar ratio of powder C is 3:1) and mix evenly. Put the steel ball and the mixed powder with a ball-to-material ratio of 20:1 into the ball mill jar in a glove box filled with argon, so that the ball-material mixture occupies the inner cavity of the ball mill jar. 15% of the volume; high-energy ball milling at room temperature at a speed of 1000 rpm for 3 hours; then the mixed powder after ball milling was cold-pressed into a cylindrical billet of Φ30mm×30mm; Self-propagating high-temperature synthetic preparation of compacts (TiB 2 +TiC) dispersion strengthened copper matrix composites, TiB 2 And the average particle size of TiC particles is about 7.5 μm.

Embodiment 2

[0011] Embodiment 2: be 200 orders with particle size, the Cu powder that purity is 99.9%, Ti powder and B 4 C powder is used as raw material, a certain amount of Cu powder, Ti powder and B 4 C powder (Cu powder and Ti+B 4 The mass ratio of C powder is 55:45, wherein Ti powder and B 4 The molar ratio of powder C is 3:1) and mix evenly. Put the steel ball and the mixed powder with a ball-to-material ratio of 40:1 into the ball mill jar in a glove box filled with argon, so that the ball-material mixture occupies the inner cavity of the ball mill jar. 25% of the volume; high-energy ball milling at room temperature at a speed of 1500 rpm for 6 hours; then the mixed powder after ball milling was cold-pressed into a cylindrical billet of Φ30mm×30mm; Self-propagating high-temperature synthetic preparation of compacts (TiB 2 +TiC) dispersion strengthened copper matrix composites, TiB 2 And the average particle size of TiC particles is about 4.5 μm.

Embodiment 3

[0012] Embodiment 3: be 300 orders with particle size, the Cu powder that purity is 99.9%, Ti powder and B 4 C powder is used as raw material, a certain amount of Cu powder, Ti powder and B 4 C powder (Cu powder and Ti+B 4 The mass ratio of C powder is 60:40, wherein Ti powder and B 4 The molar ratio of powder C is 3:1) and mix evenly. Put the steel ball and the mixed powder with a ball-to-material ratio of 80:1 into the ball mill jar in a glove box filled with argon, so that the ball-material mixture occupies the inner cavity of the ball mill jar. 35% of the volume; high-energy ball milling at room temperature at a speed of 2000 rpm for 9 hours; then the mixed powder after ball milling was cold-pressed into a cylindrical billet of Φ30mm×30mm; Self-propagating high-temperature synthetic preparation of compacts (TiB 2 +TiC) dispersion strengthened copper matrix composites, TiB 2 And the average particle size of TiC particles is about 2.5 μm.

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Abstract

The invention discloses a method for preparing (TiB2+TiC) dispersion-strengthening copper-based composites by adopting self-propagating high-temperature synthesis, comprising the following steps of: mixing a certain amount of Cu power, Ti powder and B4C powder as raw materials (the mass ratio of the Cu powder to the Ti powder to the B4C powder is 50:50-60:40, wherein the molar ratio of the Ti powder to the B4C powder is 3:1) and then efficiently ball-milling mixed powder at high temperature, wherein the granularities of the Cu power, the Ti powder and the B4C powder are less than 100 meshes, and the purities are greater than 99%; then cold molding the mixed powder; and finally preparing the (TiB2+TiC) dispersion-strengthening copper-based composites in a vacuum furnace chamber by adopting electric arc igniting compact through the self-propagating high-temperature synthesis of the compact, wherein the average grain diameter of TiB2 and TiC grains is 2-8 mu m. The invention is used for preparing the TiB2 dispersion-strengthening copper-based composites through adopting the in-situ reactive synthesis of a simple self-propagating high-temperature synthesis method and has the advantages of simple process, low production cost, high product yield and quality and the like.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite material preparation, and provides a self-propagating high-temperature synthesis preparation (TiB 2 +TiC) dispersion strengthened copper-based composite material method, which can be used in the production and preparation of high-strength and high-conductivity copper-based composite materials widely used in the fields of electric power industry, national defense industry, integrated circuits, welding equipment and the like. Background technique [0002] High-strength and high-conductivity copper alloy is a kind of structural functional material with excellent comprehensive physical properties and mechanical properties. It plays an irreplaceable role in many industrial fields and is widely used in lead frame ports of integrated circuits, various spot welding and seam welding machines. Electrodes, high-power asynchronous traction motor rotors, electrified railway contact wires, thermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C32/00C22C9/00
Inventor 朱心昆李才巨赵昆渝陶静梅陈铁力
Owner KUNMING UNIV OF SCI & TECH
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