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Method for preparing titanium diboride dispersion-strengthened Cu-base composites by using mechanical alloying method

A technology of dispersion strengthening copper and titanium diboride, which is applied in the field of metal matrix composite material preparation, can solve the problems of high production cost, complicated preparation process of ultrafine powder, and many preparation processes

Inactive Publication Date: 2010-05-05
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 The preparation process of ultrafine powder is relatively complicated, resulting in TiB 2 The preparation process of dispersion strengthened metal matrix composites is more, and the production cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Cu powder and TiO with a particle size of 150 mesh and a purity of 99.9% 2 Pink, B 2 O 3 Powder and Mg powder as raw materials, the Cu powder, TiO 2 Pink, B 2 O 3 Powder and Mg powder (Cu powder and TiO 2 +B 2 O 3 +Mg powder mass ratio is 95:5, of which TiO 2 , B 2 O 3 , Mg molar ratio is 1:1:5) Evenly mix, put the steel ball and mixed powder with the ball-to-material ratio of 20:1 into the high-energy ball mill ball mill tank in the glove box filled with argon, so that the ball-material mixture accounts for 15% of the volume of the inner cavity of the ball milling tank, high-energy ball milling at room temperature at 1000 rpm for 3 hours to form Cu and TiB 2 Mix the micro-powder ceramic material with MgO; then use hydrochloric acid with a concentration of 3mol / l to pickle the mixed powder for 12 hours at a temperature of 30°C to wash away the MgO to obtain Cu+TiB 2 Mixed powder; Cu+TiB 2 After the mixed powder is dried, put it into the ball mill jar of the high-...

Embodiment 2

[0013] Example 2: Using Cu powder and TiO with a particle size of 200 mesh and a purity of 99.9% 2 Pink, B 2 O 3 Powder and Mg powder as raw materials, the Cu powder, TiO 2 Pink, B 2 O 3 Powder and Mg powder (Cu powder and TiO 2 +B 2 O 3 +Mg powder mass ratio is 85:15, of which TiO 2 , B 2 O 3 , Mg molar ratio is 1:1:5) uniformly mix, put the steel ball and mixed powder with the ball-to-material ratio of 40:1 into the high-energy ball mill ball mill tank in the glove box filled with argon, so that the ball-material mixture accounts for 25% of the volume of the inner cavity of the ball milling tank, high-energy ball milling at 1500 rpm at room temperature for 9 hours to form Cu and TiB 2 Mix the micro-powder ceramic material with MgO; then use hydrochloric acid with a concentration of 2mol / l to pickle the mixed powder for 9h at a temperature of 55℃ to wash away the MgO to obtain Cu+TiB 2 Mixed powder; Cu+TiB 2 After the mixed powder is dried, put it into the ball mill jar of the hi...

Embodiment 3

[0014] Example 3: Cu powder and TiO with a particle size of 300 mesh and a purity of 99.9% 2 Pink, B 2 O 3 Powder and Mg powder as raw materials, the Cu powder, TiO 2 Pink, B 2 O 3 Powder and Mg powder (Cu powder and TiO 2 +B 2 O 3 +Mg powder mass ratio is 80:20, of which TiO 2 , B 2 O 3 , Mg molar ratio is 1:1:5) uniformly mix, put the steel ball and mixed powder with the ball-to-material ratio of 80:1 into the high-energy ball mill ball mill tank in the glove box filled with argon, so that the ball-to-material mixture accounts for 35% of the volume of the inner cavity of the ball milling tank, high-energy ball milling at room temperature at 2000 rpm for 15 hours to form Cu and TiB 2 Mix the micropowder ceramic material with MgO; then use hydrochloric acid with a concentration of 1mol / l to pickle the mixed powder for 3h at a temperature of 75℃ to wash away the MgO to obtain Cu+TiB 2 Mixed powder; Cu+TiB 2 After the mixed powder is dried, put it into the ball mill jar of the high-...

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Abstract

The invention discloses a method for preparing titanium diboride dispersion-strengthened Cu-base composites by using a mechanical alloying method, taking Cu powder, TiO2 powder, B2O3 powder and Mg powder with the granularity less than 100 meshes and purity more than 99 percent as raw materials. The method comprises the following steps of: thoroughly mixing the Cu powder, the TiO2 powder, the B2O3 powder and the Mg powder; carrying out high-energy ball-grinding on the mixed powder for 3 to 15 hours at the revolution speed of 1000 to 2000 rpm at room temperature; acid pickling the powder for 2 to 15 hours at the temperature of 20 to 80 DEG C with 1 to 3 mol / L hydrochloric acid to get mixed powder of Cu and TiB2; drying the mixed powder of Cu and TiB2, and carrying out high-energy ball-grinding on mixed powder of Cu and TiB2 for 1 to 3 hours ; cold pressing the mixed powder of Cu and TiB2 for forming; and at last sintering the mixture of Cu and TiB2 for 1 to 3 hours in a resistance furnace with argon protection gas at the temperature of 800 to 1000 DEG C to get the TiB2 dispersion-strengthened Cu-base composites with granularity of 5 to 10 microns. The method for preparing the TiB2 dispersion-strengthened Cu-base composites by using the simple high-energy ball-milling mechanical alloying method has the advantages of simple technology, low production cost, high product yield and high product quality.

Description

Technical field [0001] The invention belongs to the technical field of metal matrix composite material preparation, and provides a method for synthesizing and preparing titanium diboride dispersion-strengthened copper matrix composite material by a mechanical alloying method. Background technique [0002] High-strength and high-conductivity copper alloys are structural and functional materials with excellent comprehensive physical and mechanical properties. They play an irreplaceable role in many industrial fields. They are 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, thermonuclear experimental reactor (ITER) divertor vertical target heat sink and other power, electrical and mechanical manufacturing fields. However, the strength and conductivity in copper alloys have always been a pair of contradictory characteristics. One goes u...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C9/00
Inventor 朱心昆李才巨赵昆渝颜丙勇陶静梅陈铁力
Owner KUNMING UNIV OF SCI & TECH
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