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A kind of preparation method of Aln particle reinforced mg-al matrix composite material

A composite material and particle reinforcement technology, applied in the field of metal matrix composite materials, can solve the problems of poor wear resistance and high temperature resistance, limited application fields and scope, low elastic modulus of magnesium alloys, etc., and achieve good mechanics and good interface bonding , evenly distributed effect

Inactive Publication Date: 2017-03-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, magnesium alloys have disadvantages such as low elastic modulus, low strength, poor wear resistance and high temperature resistance, which limit their application fields and scope; and the solid solubility of alloying elements is low, even if aging strengthening is used, the effect is minimal

Method used

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  • A kind of preparation method of Aln particle reinforced mg-al matrix composite material

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Effect test

Embodiment 1

[0016] A method for preparing an AlN particle reinforced Mg-Al matrix composite material, comprising the following steps:

[0017] Step 1, batching design, weigh the three components of 200 mesh magnesium powder, 10um aluminum powder, and 1-3um AlN powder according to the weight ratio of 91:9:5.26, and then weigh 2% of the aforementioned total mass of stearic acid as Process control agent to prevent powder cold welding and make the reinforcement particles more uniformly distributed in the alloy powder;

[0018] Step 2, ball milling, put the powder mixture, stearic acid, and agate balls of two specifications into a 500ml nylon ball milling jar in a glove box protected by pure argon, and mix various powders under the protection of argon For ball milling, fully mix the materials by ball milling on the roller mill for 26 hours, the speed of the roller mill is 85r / min; the two kinds of balls used in the ball milling process are φ10 and φ6 respectively, and the mass ratio of large b...

Embodiment 2

[0023] A method for preparing an AlN particle reinforced Mg-Al matrix composite material, comprising the following steps:

[0024] Step 1, batching design, weigh the three components of 200-mesh magnesium powder, 10um aluminum powder, and 1-3um AlN powder according to the weight ratio of 91:9:11.11, and then weigh the aforementioned 2% stearic acid as the process Control agent to prevent powder cold welding and make the reinforcement particles more evenly distributed in the alloy powder;

[0025] Step 2, ball milling, put the powder mixture, stearic acid, and agate balls of two specifications into a 500ml nylon ball milling jar in a glove box protected by pure argon, and mix various powders under the protection of argon For ball milling, fully ball mill and mix the materials on the roller mill for 24 hours, the speed of the roller mill is 90r / min; the two kinds of balls used in the ball milling process are φ10 and φ6 respectively, and the mass ratio of large balls to small bal...

Embodiment 3

[0030] A method for preparing an AlN particle reinforced Mg-Al matrix composite material, comprising the following steps:

[0031] Step 1, batching design, weigh the three components of 200 mesh magnesium powder, 10um aluminum powder, and 1-3um AlN powder according to the weight ratio of 91:9:17.65, and then weigh the aforementioned 2% stearic acid as the process Control agent to prevent powder cold welding and make the reinforcement particles more evenly distributed in the alloy powder;

[0032] Step 2, ball milling, put the powder mixture, stearic acid, and agate balls of two specifications into a 500ml nylon ball milling jar in a glove box protected by pure argon, and mix various powders under the protection of argon For ball milling, carry out full ball milling and mixing on the roller mill for 30 hours, the speed of the roller mill is 70r / min; the two kinds of balls used in the ball milling process are φ10 and φ6 respectively, and the mass ratio of large balls to small ba...

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Abstract

A kind of preparation method of AlN particle reinforced Mg-Al matrix composite material, after weighing magnesium powder, aluminum powder, AlN powder and stearic acid, put into the nylon ball mill tank that has argon protection, put on the roller mill and pass through low-speed Long-term ball milling and mixing to make a uniformly mixed powder, and then press in a steel mold to form a prefabricated block green body by two-way pressure, and finally put the green body into a graphite crucible and put it into a vacuum sintering furnace. Carry out pre-evacuation, then pass through argon, and heat and sinter under the protection of argon. The AlN particle-reinforced Mg-Al-based composite material prepared by the invention is evenly distributed, has high density, good interface bonding, good mechanical and physical properties, and at the same time avoids the danger of high-activity magnesium powder being easily combusted during high-energy ball milling , and problems such as excessive interface reactions.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a preparation method of AlN ceramic particles reinforced Mg-Al-based composite materials. Background technique [0002] With the shortage of energy and the deterioration of the environment, people pay more and more attention to lightweight and green manufacturing. From the material point of view, an effective way to solve this problem is to apply a large number of lightweight and high-strength materials. Magnesium alloys have the advantages of low density, high specific strength and specific stiffness, excellent electromagnetic shielding and damping properties, and easy machining and recycling. However, magnesium alloy has disadvantages such as low elastic modulus, low strength, poor wear resistance and high temperature resistance, which limit its application field and scope; and the solid solubility of alloying elements is low, even if aging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/00C22C1/05C22C1/10C22C32/00
Inventor 鲍崇高陈杰
Owner XI AN JIAOTONG UNIV
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