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Composite material of magnesium alloy and method for preparing the same

A composite material and magnesium alloy technology, applied in the field of magnesium alloy composite materials, can solve the problems of coarse structure of composite materials, low strength of composite materials, and limited application range, and achieve uniform distribution of nanoparticles, excellent strength and plasticity, and particle distribution And the matrix structure is fine and evenly woven fine effect

Inactive Publication Date: 2008-03-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

H.Ferkel et al prepared composite materials containing nanoparticles by powder metallurgy (Materials Science and Engineering A, 2001, Vol 298; Materials Science and Engineering A, 1997, Vol 234-236), but the matrix metal is pure magnesium and It is not a magnesium alloy, so the strength of the composite material is not high, and the scope of use is limited
Jie Lan et al. prepared nanoparticle-reinforced magnesium-based composites, but they used casting technology instead of powder metallurgy technology (Materials Science and Engineering A, 2004, Vol 386), which could easily lead to defects such as segregation of reinforced particles and coarse structure of composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take matrix metal powder: 20g Al, 5g Zn, 1g Mn, 974g Mg. After the matrix metal is prepared, add nanoparticles, the amount of nanoparticles added is 0.1% of the mass of the matrix metal, that is 1g, the average size of the particles is 10nm, and the type of nanoparticles is TiC.

[0027] After ball milling 5kg of the mixture prepared according to the above formula for 20 hours, put it into a low-carbon steel model of 80×100mm under the protection of ammonia gas, seal it with epoxy resin, and vacuum sinter at 420°C and 10MPa pressure. The sintered body is extruded into rods on a 500-ton extruder.

[0028] The bar was machined into a national standard sample for room temperature tensile test, the result: the tensile strength of the material was 260MPa, and the elongation was 18%.

Embodiment 2

[0030] Take matrix metal powder: 40g Al, 5g Zn, 1g Mn, 954g Mg. After the matrix metal is prepared, add nanoparticles, the amount of nanoparticles added is 0.5% of the mass of the matrix metal, that is 5g, the average size of the particles is 30nm, and the type of nanoparticles is SiC.

[0031] After ball milling 5kg of the mixture prepared according to the above formula for 30 hours, put it into a low-carbon steel model of 50×150mm under the protection of argon, seal it with epoxy resin, and vacuum sinter at 350°C and 15MPa pressure. The sintered body is extruded into rods on a 500-ton extruder.

[0032] The bar was machined into a national standard sample for tensile test at room temperature. The result: the tensile strength of the material was 270MPa, and the elongation was 17%.

Embodiment 3

[0034] Take matrix metal powder: 60g Al, 5g Zn, 1g Mn, 934g Mg. After the matrix metal is configured, add nanoparticles, the amount of nanoparticles added is 0.7% of the mass of the matrix metal, which is 7g, the average particle size is 50nm, and the type of nanoparticles is Al 2 o 3 .

[0035] After ball milling 5kg of the mixture prepared according to the above formula for 25 hours, it was loaded into a low-carbon steel model of 80×100mm under the protection of argon, sealed with epoxy resin, and sintered in vacuum at 300°C and a pressure of 20Mpa. The sintered body is extruded into rods on an 800-ton extruder.

[0036] The bar was machined into a national standard sample for tensile test at room temperature. The result: the tensile strength of the material was 290MPa, and the elongation was 16%.

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Abstract

The invention discloses a magnesium alloy composite material comprising powdered alloy and nano particles of carbide and oxide, wherein the composite material powdered alloy includes (by weight portions) Al 2-10 parts, Zn 0.1-1 part, Mn 0.02-0.4 part, Mg 88.60-97.88 parts.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a magnesium alloy composite material with fine and uniform particle distribution and matrix structure and excellent plasticity and a method for preparing the magnesium alloy composite material. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and good impact resistance. However, when used as a structural material, its hardness, stiffness and wear resistance are not ideal, which limits its wide application. By adding a reinforcing phase to the matrix, such as hard particles or fibers to prepare a magnesium-based composite material, the above properties such as hardness, stiffness and wear resistance can be significantly improved, and its strength, wear resistance and elastic modulus and other properties can be improved. [0003] The reinforcing phase particles used to prepare magnesium-based composites mainly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F9/04B22F3/14
Inventor 蒋斌王健欧忠文
Owner CHONGQING UNIV
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