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Magnesium-aluminium composite material and its preparing method

A composite material, magnesium-aluminum technology, applied in the field of magnesium-aluminum composite materials and their preparation, can solve the problems of limited improvement of the corrosion resistance of the matrix, lack of surface modifiability, long processing time, and the like, so as to overcome the corrosion resistance. Poor, good surface modifiability, stable product quality

Inactive Publication Date: 2006-08-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently Ma Youping reported a method to improve the corrosion resistance of the substrate by infiltrating Al and Zn on the surface of ZM5 magnesium alloy (Ma Youping, [Rare Metal Materials and Engineering, 2005, 34(3): 433-435]) , the existing problem is that the processing time is long (12 hours), the energy consumption is large, and the obtained infiltrated layer is still based on magnesium, and does not form an aluminum-based layer, that is, an aluminum alloy layer, which is corrosion-resistant to the substrate The performance improvement is limited, and the modifiable performance of the surface cannot be improved as it should be
Therefore, a method that can improve the corrosion resistance and surface modification properties of magnesium or magnesium alloys to a large extent, has a simple process, is suitable for industrial batch production, and meets environmental protection requirements has not been found so far.

Method used

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  • Magnesium-aluminium composite material and its preparing method

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Comparison scheme
Effect test

Embodiment approach 1

[0011] Use pure aluminum powder to embed the magnesium workpiece in an airtight container and place it in a vacuum chamber with a vacuum degree of 3×10 -2 Pa, 400°C for 120 minutes and then cooling to obtain a magnesium-aluminum composite material with magnesium as the matrix and an aluminized layer as the surface. Electronic scanning observed that as figure 1 Shown is an aluminized layer with a thickness of 50 μm.

Embodiment approach 2

[0013] Use aluminum alloy powder to embed the magnesium workpiece in an airtight container and place it in a vacuum chamber with a vacuum degree of 3.5×10 -2 Pa, keep at 400°C for 100 minutes and then cool down to obtain a magnesium-aluminum composite material with magnesium as the matrix and an aluminized layer as the surface.

Embodiment approach 3

[0015] Use pure aluminum powder to embed the workpiece made of AZ91 magnesium alloy in a closed container and place it in a vacuum chamber with a vacuum degree of 4.5×10 -2 Pa, 400°C for 60 minutes and then cooling to obtain a magnesium-aluminum composite material with the AZ91 magnesium alloy as the matrix and the aluminized layer as the surface.

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Abstract

The present invention is composite Mg-Al material and its preparation process, and belongs to the field of material producing engineering. Specifically, the present invention is the technological prof embedding Mg or Mg alloy in Al powder, Al alloy powder, or the homogeneous mixture of Al powder or Al alloy powder, Al2O3 and NaF; and maintaining at 350-500 deg.c for 30-120min under vacuum or reducing gas protection condition to form compact aluminizing layer on the surface of Mg or Mg alloy. The composite Mg-Al material with Mg or Mg alloy base and surface aluminizing layer is superior to Mg and Mg alloy, which has poor corrosion resistance, excellent shock eliminating performance, electromagnetic shielding performance, etc. similar to that of Mg and Mg alloy, and excellent surface modification performance.

Description

1. Technical field [0001] The invention relates to a magnesium-aluminum composite material and a preparation method thereof, belonging to the field of material processing engineering. Specifically, by embedding magnesium or magnesium alloy in aluminizing agent and keeping it warm under the condition of vacuum or reducing gas protection, a magnesium-aluminum composite with magnesium or magnesium alloy as the matrix and the aluminized layer as the surface is obtained. Materials and their preparation methods. 2. Background technology [0002] Magnesium is the lightest metal structure material, rich in resources, easy to prepare, excellent in electromagnetic shielding performance, and easy to recycle. Many excellent properties make magnesium have a wide application value in many fields, such as automobile, aerospace, IT industry, etc., and because of its good biocompatibility, it has the possibility to be used as biomaterials (Gong Guifen et al., [Material Protection , 2002, 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/48
Inventor 梁伟刘奋成赵兴国李线绒李秀杰
Owner TAIYUAN UNIV OF TECH
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