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Mixed-phase reinforced magnesium-based composite material and preparation method thereof

A technology of composite materials and mixed phases, which is applied in the field of metal structural materials, can solve problems such as material performance degradation, and achieve the effects of improving comprehensive mechanical properties, expanding application prospects, and improving tension-compression symmetry

Inactive Publication Date: 2018-03-06
QINGHAI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, in the process of preparing mixed-phase reinforced magnesium-based composite materials, since the reinforcement is nano-scale, there are still different degrees of agglomeration phenomenon in the direct conventional ball milling dispersion treatment, resulting in the decline of the performance of the prepared material in the later stage.

Method used

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  • Mixed-phase reinforced magnesium-based composite material and preparation method thereof
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  • Mixed-phase reinforced magnesium-based composite material and preparation method thereof

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preparation example Construction

[0036] The invention provides a method for preparing a mixed-phase reinforced magnesium-based composite material, comprising the following steps:

[0037] Step 1. Pretreatment: Weigh 80-90g of vacuum-packed magnesium alloy powder, 0.04-0.05g of nano-diamond particles, 4.5-6.5g of magnesium borate whiskers, 1750-1850g of cleaned steel balls, and ensure that the ball-to-material ratio is about 20:1; Put the weighed nano-diamond particles and magnesium borate whiskers into the alcohol solution, ultrasonically disperse for 20-40min, then mechanically stir for 20-40min, then add the weighed magnesium alloy powder, ultrasonically disperse and carry out Stir mechanically for 20-40 minutes, then place the mixed powder solution in a drying oven, blow it at room temperature until the powder is completely dry, and sieve the dried powder with an 80-mesh sieve to prepare a mixed powder for later use; among them, alcohol does not mix with the experimental Reaction with powder; it is easier ...

Embodiment 1

[0055] A method for preparing a mixed-phase reinforced magnesium-based composite material, comprising the following steps:

[0056] Step 1. Pretreatment: Weigh 85g of vacuum-packed magnesium alloy powder, 0.045g of nano-diamond particles, 5.5g of magnesium borate whiskers, and 1800g of cleaned steel balls to ensure that the ball-to-material ratio is about 20:1; weigh the Put the nano-diamond particles and magnesium borate whiskers into the alcohol solution, ultrasonically disperse for 30min, then mechanically stir for 30min, then add the weighed magnesium alloy powder, ultrasonically disperse and mechanically stir for 30min, then place the mixed powder solution in a dry place In the box, blow at room temperature until the powder is completely dry, and sieve the dry powder with an 80-mesh sieve to prepare a mixed powder for later use; wherein, alcohol does not react with the experimental powder; ultrasonic dispersion and mechanical stirring are used in the alcohol solution The ...

Embodiment 2

[0073] A method for preparing a mixed-phase reinforced magnesium-based composite material, comprising the following steps:

[0074] Step 1. Pretreatment: Weigh 80g of vacuum-packed magnesium alloy powder, 0.05g of nano-diamond particles, 4.5g of magnesium borate whiskers, and 1850g of cleaned steel balls to ensure that the ball-to-material ratio is about 20:1; weigh the Put the nano-diamond particles and magnesium borate whiskers into the alcohol solution, ultrasonically disperse for 20min, then mechanically stir for 40min, then add the weighed magnesium alloy powder, ultrasonically disperse and mechanically stir for 20min, then place the mixed powder solution in a dry place In the box, blow at room temperature until the powder is completely dry, and sieve the dry powder with an 80-mesh sieve to prepare a mixed powder for later use; wherein, alcohol does not react with the experimental powder; ultrasonic dispersion and mechanical stirring are used in the alcohol solution The m...

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Abstract

The invention discloses a mixed-phase reinforced magnesium-based composite material and a preparation method thereof. The preparation method comprises the following steps: pretreating magnesium alloypowder, nano-diamond particles and magnesium borate whiskers to obtain mixed powder; performing mixed ball milling on the mixed powder and milling steel balls to obtain ball-milled mixed powder; thenperforming hot pressing in vacuum to obtain a blank, and performing hot extrusion. The mixed-phase reinforced magnesium-based composite material prepared by the preparation method provided by the invention has significantly improved frictional wear and tension-compression symmetry.

Description

technical field [0001] The application belongs to the technical field of metal structural materials, and in particular relates to a mixed-phase reinforced magnesium-based composite material and a preparation method thereof. Background technique [0002] As one of the lightest metal structural materials, magnesium alloy has a series of excellent properties such as high specific strength, specific stiffness, electromagnetic shielding properties and good machinability, so it has shown great applications in aviation, aerospace, automobile and other fields Prospects and industry value. Nevertheless, the relatively low strength and poor plasticity largely restrict the further extensive application of this alloy in various fields. Therefore, improving the strength and plasticity of magnesium alloys is an urgent problem to be solved. [0003] The strengthening of the material can be effectively realized by adding the reinforcing phase in the magnesium alloy matrix. Compared with ...

Claims

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Application Information

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IPC IPC(8): C22C49/06C22C49/14C22C47/14C22C101/08
CPCC22C47/14C22C49/06C22C49/14
Inventor 马国俊金培鹏王金辉李小强李尚鹏
Owner QINGHAI UNIVERSITY
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