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Cu/AlMgB14 composite material and preparation method thereof

A composite material, almgb14 technology, applied in the field of Cu/AlMgB14 composite material and its preparation, can solve problems such as the contradiction between mechanical properties and friction properties, and achieve the effect of low wear rate and wide application prospects

Inactive Publication Date: 2015-08-12
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, adding a ceramic particle reinforcement phase that takes into account both high hardness, high strength and self-lubricating properties in the copper matrix will effectively solve the problem of the contradiction between the mechanical properties and the friction properties of the current copper-based composite materials.

Method used

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  • Cu/AlMgB14 composite material and preparation method thereof
  • Cu/AlMgB14 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the mass percentage: AlMgB 14 5%, copper 95%, weigh the materials respectively, dry mix them in a ball mill at a speed of 200 r / min for 4 hours, put the mixed materials into a graphite mold, and then place them in a vacuum hot-press sintering furnace for hot pressing Sintering, the sintering parameters are: vacuum degree 0.85×10 -1 Pa, heating rate 15 ℃ / min, sintering temperature 950 ℃, applied pressure 30 MPa, heat preservation and pressure holding for 30 minutes. After sintering, the material is cooled to room temperature with the furnace and taken out.

[0018] The density of the composite material obtained in this embodiment is 7.75 g / cm 3 (pure copper is 8.65 g / cm 3 ), bending strength 537 MPa, friction coefficient 1.0.

Embodiment 2

[0020] According to the mass percentage: AlMgB 14 10%, copper 90%, weigh the materials respectively, dry mix them in a ball mill at a speed of 250 r / min for 5 hours, put the mixed materials into a graphite mold, and then place them in a vacuum hot-pressing sintering furnace for heating. Pressure sintering, sintering parameters: vacuum degree 0.65×10 -1 Pa, heating rate 10 ℃ / min, sintering temperature 1000 ℃, applied pressure 30 MPa, heat preservation and pressure holding for 30 minutes. After sintering, the material is cooled to room temperature with the furnace and taken out.

[0021] The density of the composite material obtained in this embodiment is 6.15 g / cm 3 , bending strength 525 MPa, friction coefficient 0.6.

Embodiment 3

[0023] According to the mass percentage: AlMgB 14 15%, copper 85%, weigh the materials respectively, dry mix them in a ball mill at a speed of 300 r / min for 6 hours, put the mixed materials into a graphite mold, and then place them in a vacuum hot-pressing sintering furnace for heating. Pressure sintering, sintering parameters: vacuum degree 0.75×10 -1 Pa, heating rate 15 ℃ / min, sintering temperature 1100 ℃, applied pressure 30 MPa, heat preservation and pressure holding for 30 minutes. After sintering, the material is cooled to room temperature with the furnace and taken out.

[0024] The density of the composite material obtained in this embodiment is 5.35 g / cm 3 , the material has both high strength (bending strength 550 MPa), wear resistance and low friction properties (friction coefficient 0.32).

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Abstract

The invention discloses a Cu / AlMgB14 composite material which is composed of 5-30% by mass of AlMgB14 and 70-95% by mass of copper. The Cu / AlMgB14 composite material disclosed by the invention has the characteristics of being high in strength, wear-resistant, adjustable in friction coefficient and the like and can be used for manufacturing friction motion parts such as bearings, bushings, slide blocks, brake pads and the like. The invention further discloses a preparation method of the composite material. The preparation method is simple in preparation process, simple in equipment needed and short in production period.

Description

technical field [0001] The present invention relates to a kind of Cu / AlMgB 14 The composite material and its preparation method are characterized in that the material has high strength and low wear characteristics at the same time, and an adjustable coefficient of friction, and belongs to the field of lubricating wear-resistant materials. technical background [0002] Due to its excellent physical and chemical properties (high thermal conductivity, electrical conductivity, corrosion resistance), low cost, and excellent processing performance, copper alloys have an irreplaceable role in high-end equipment manufacturing fields such as aerospace, high-speed trains, ships, and advanced weaponry systems. It is widely used in the production of moving parts such as microelectronic components, brake pads, and sliding bearings. However, copper alloys have low strength, high friction coefficient, and poor wear resistance, which greatly affect their application safety and service life...

Claims

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Application Information

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IPC IPC(8): C22C29/14C22C1/10C22C1/05
Inventor 杨军程军刘维民朱圣宇乔竹辉
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI