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A kind of metal matrix composite material and its preparation method and application

A composite material and metal-based technology, which is applied in the field of metal-based composite materials and its preparation, can solve the problems of low thermal expansion coefficient, discounted reinforcement effect, weak bonding force between reinforced particles and aluminum alloy matrix, etc., to improve mechanical properties and improve The effect of modulus and reinforcement effect fully exerted

Active Publication Date: 2020-09-22
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal expansion coefficient of the composite material is low, and the dimensional stability of the wheel hub is good, but the interface bonding force between the reinforcing particles and the aluminum alloy matrix is ​​weak, which will greatly reduce the reinforcing effect

Method used

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  • A kind of metal matrix composite material and its preparation method and application
  • A kind of metal matrix composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A method for preparing a metal matrix composite material comprises the following steps:

[0063] (1) Mix 37g MoAlB powder with 63g aluminum elemental powder, add 200g agate balls, carry out ball milling for 8h, then pass the mixed powder after ball milling through a 200 mesh sieve, and obtain MoAlB-aluminum mixed powder with MoAlB powder content of 37wt.%. ;

[0064] (2) Put the MoAlB-metal mixed powder into the graphite mold, in the argon atmosphere, heat up to 760°C at a rate of 18°C / min, keep it for 60min, then cool down to 700°C, and apply a pressure of 25MPa while sintering to keep Press for 60 minutes, then cool to room temperature to obtain an aluminum matrix composite material.

Embodiment 2

[0066] The difference from Example 1 is that step (2) specifically includes: adding the MoAlB-metal mixed powder into the graphite mold, raising the temperature to 610°C at a rate of 18°C / min under an argon atmosphere, and applying a pressure of 25MPa, Sintering for 60 min, and then cooling to room temperature to obtain an aluminum matrix composite material.

Embodiment 3

[0068] The difference from Example 1 is that step (2) specifically includes: adding the MoAlB-metal mixed powder into the graphite mold, raising the temperature to 820°C at a rate of 18°C / min under an argon atmosphere, keeping the temperature for 60min, and then Lower the temperature to 710°C, apply a pressure of 25MPa for sintering, hold the pressure for 60min, and then cool to room temperature to obtain an aluminum matrix composite material.

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Abstract

The invention discloses a metal matrix composite material, a preparation method thereof and an application of the composite material. The metal matrix composite material comprises a metal matrix bodyand MoAlB particles distributed in the metal matrix body, and transition layers continuously wraps the surfaces of the MoAlB particles. The preparation method of the metal matrix composite material includes the steps: (1) mixing MoAlB powder and metal powder to obtain MoAlB-metal mixed powder; (2) heating the MoAlB-metal mixed powder, and cooling the heated MoAlB-metal mixed powder to obtain the metal matrix composite material. The metal matrix composite material effectively solve the problem of poor binding force between a reinforcement phase and the metal matrix body in the prior art, reinforced effects are sufficiently played, the mechanical property of the metal material is improved, the method is simple and environmentally friendly, mass production is facilitated, and the composite material is applied to aeronautics, astronautics, ships, rail traffic, automobiles, nuclear industry and ordnance industry.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a metal matrix composite material and its preparation method and application. Background technique [0002] Metal materials are widely used due to their excellent electrical conductivity, good ductility, and high mechanical strength, but most metals have disadvantages such as low modulus, low hardness, and relatively poor wear resistance, which also make them widely used in industrial applications. subject to certain restrictions. By adding a high modulus and high hardness second phase to the metal material to form a metal matrix composite material, the hardness and wear resistance of the metal material can be effectively improved, but most of the second phase (SiC, Al 2 o 3 , TiC, carbon nanotubes, etc.) and the metal matrix have poor wettability, so that the reinforcement phase particles cannot form a strong interface bond with the metal matrix, and it is difficult to fully...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C21/00C22C30/00C22C1/10B22F3/10B22F3/14
CPCB22F3/1007B22F3/14C22C1/05C22C21/00C22C30/00
Inventor 王钰李萌启
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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