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Method for preparing enhanced Mg-based composite material by using graphite particles

A technology of graphite particles and composite materials, which is applied in the field of preparation of magnesium-based composite materials, can solve the problems of not having high thermal conductivity and high damping performance at the same time, and achieve the effects of improving damping performance, enhancing thermal conductivity and damping, and improving thermal conductivity

Active Publication Date: 2014-05-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the current magnesium-based composite materials cannot have high thermal conductivity and high damping performance at the same time, thereby providing a preparation method of graphite particle-reinforced magnesium-based composite materials

Method used

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  • Method for preparing enhanced Mg-based composite material by using graphite particles
  • Method for preparing enhanced Mg-based composite material by using graphite particles
  • Method for preparing enhanced Mg-based composite material by using graphite particles

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specific Embodiment approach 1

[0017] Specific embodiment one: the preparation method of a kind of graphite particle reinforced magnesium-based composite material in this embodiment is carried out according to the following steps:

[0018] 1. Preparation of semi-solid molten magnesium alloy: heating the matrix magnesium alloy from room temperature to 700°C-750°C, and then lowering the temperature to 580°C-650°C to obtain a semi-solid molten magnesium alloy;

[0019] 2. Preparation of graphite-alloy melt: Stir the semi-solid molten magnesium alloy obtained in step 1 at a rotating speed of 500rpm to 2000rpm, and simultaneously heat the graphite particles to 450°C to 500°C to obtain preheated graphite particles. Add the preheated graphite particles into the semi-solid molten magnesium alloy at a rotating speed of 500rpm-2000rpm, and continue to stir for 10min-25min at a rotating speed of 500rpm-2000rpm to obtain a graphite-alloy melt; step 2 The volume ratio of the graphite particles to the semi-solid molten m...

specific Embodiment approach 2

[0023] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the temperature of the matrix magnesium alloy is raised from room temperature to 710°C to 730°C, and then the temperature is lowered to 600°C to 630°C to obtain semi-solid molten magnesium alloy. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 to Embodiment 2 in that in Step 2, the semi-solid molten magnesium alloy obtained in Step 1 is stirred at a rotational speed of 1000 rpm to 1500 rpm. Others are the same as one of the specific embodiments 1 to 2.

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Abstract

The invention provides a method for preparing an enhanced Mg-based composite material by using graphite particles, relates to a method for preparing an enhanced Mg-based composite material, and aims to solve the technical problem that the existing Mg-based composite material does not has high thermal conductivity performance or high damping performance. The preparation method comprises the following steps: 1, preparing semi-solid molten magnesium alloy; 2, preparing a graphite- alloy melt; 3, preparing the enhanced Mg-based composite material by using the graphite particles. According to the enhanced Mg-based composite material by using the graphite particles, the effect that the graphite particles can improve the thermal conductivity performance and the damping performance of the composite material is fully played through stirring casting and control of the volume fraction of the graphite particles, so that the Mg-based composite material with high thermal conductivity performance and high damping performance is obtained. The method is mainly used for preparing the Mg-based composite material.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material. Background technique [0002] The rapid development of modern science and technology has a very urgent demand for heat transfer and heat dissipation and vibration and noise reduction technologies. At present, the application of heat transfer and heat dissipation and vibration reduction and noise reduction technology has involved many fields such as aerospace, nuclear industry, military equipment, land transportation, heavy industry, electric machinery department, light industry, textile industry department, large buildings and civil structures, etc. field. Efficient heat conduction and heat dissipation are key issues in the field of thermal management. Therefore, the requirements for thermally conductive materials, which are an important part of thermal control, are increasingly high, and there is an urgent need to develop materials with light weight and high therma...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C23/00
Inventor 王晓军向抒林胡小石吴叶伟吴昆郑明毅乔晓光
Owner HARBIN INST OF TECH
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