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Novel particle-reinforced aluminum-base composite material and preparation method thereof

A technology for particle-reinforced aluminum and composite materials, which is applied in the field of design and preparation of aluminum-based composite materials and new particle-reinforced aluminum-based composite materials, which can solve the problems of high melting point, single preparation and action mechanism, and low thermal expansion coefficient.

Inactive Publication Date: 2014-03-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 1. The particles currently used are all small molecules or single-molecule substances, and the types are relatively single, and the preparation and mechanism of action are also single. Therefore, the development of a composite compound that works synergistically with simple compounds to strengthen the matrix will have new organization and performance characteristics. Among many complex compounds, magnesium aluminum spinel MgO·Al 2 o 3 It is a high stability compound with high melting point (2135°C), high strength, low thermal expansion coefficient, good thermal conductivity, good chemical stability, etc. It is suitable as a strengthening phase of metal matrix

Method used

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  • Novel particle-reinforced aluminum-base composite material and preparation method thereof

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Embodiment 1

[0021] Example 1 2vol.% (Al 2 O 3 +MgO·Al 2 O 3 ) Preparation and mechanical properties of particle reinforced ZL101 aluminum matrix composite

[0022] The main components of ZL101A are shown in Table 1.

[0023] Table 1 The chemical composition of ZL101 aluminum alloy (wt%)

[0024]

[0025] With MgO and SiO 2 As a reactant, the total volume fraction of the target enhanced particles is 2vol.%, which is expected to generate a simple compound Al 2 O 3 Volume fraction 1vol.%, complex compound MgO·Al 2 O 3 (Magnesium-aluminum spinel) The volume fraction is 1vol.%, and the initial amount of aluminum is 2kg, you need to add 5g of MgO, SiO 2 The amount is 29.56g, and the total reactant powder is 34.56g.

[0026] The preparation process is as follows: cool the baked reactants and mix them, divide 34.56g of reactants into two packages according to the amount of 20g~21g per powder package, wrap them in aluminum foil for use; melt the ZL101 aluminum alloy in a crucible furnace When th...

Embodiment 2

[0027] Example 2 4vol.% (Al 2 O 3 +MgO·Al 2 O 3 ) Preparation and mechanical properties of particle reinforced ZL101 aluminum matrix composite

[0028] With MgO and SiO 2 +TiO 2 As a reactant, the total volume fraction of the target enhanced particles is 4vol.%, which is expected to generate a simple compound Al 2 O 3 The volume fraction is 2vol.%, and the complex compound MgO·Al 2 O 3 (Magnesium-aluminum spinel) The volume fraction is 2vol.%, and the initial amount of aluminum is 2kg, you need to add 10g of MgO, SiO 2 Quantity 29.56g, TiO 2 The amount is 39.41g, and the total reactant powder is 78.97g.

[0029] The preparation process is as follows: cool the baked reactants and mix them, divide 78.97g of reactants into three bags according to the amount of 23g~27g per powder bag, wrap them in aluminum foil for use; melt the ZL101 aluminum alloy in a crucible furnace When the temperature reaches 850℃, the powder bag is pressed into the melt in sequence with a graphite bel...

Embodiment 3

[0030] Example 3 3vol.% (Al 2 O 3 +MgO·Al 2 O 3 ) Preparation and mechanical properties of particle reinforced 7055 aluminum matrix composite

[0031] The composition of 7055 aluminum alloy is shown in Table 2.

[0032] Table 2 Composition table of 7055 aluminum alloy

[0033]

[0034] With MgO and ZrO 2 As a reactant, the total volume fraction of the target enhanced particles is 3vol.%, and the simple compound Al is generated 2 O 3 The volume fraction is 1.5vol.%, and the complex compound MgO·Al 2 O 3 (Mg-Al spinel) The volume fraction is 1.5vol.%, the initial amount of aluminum is 1kg, and the amount of MgO added is 7.5g, ZrO 2 The amount is 90.9g, and the total amount of reactants is 98.4g.

[0035] The preparation process is as follows: cool the baked reactants and mix them, divide 98.4g of the reactants into four packages according to the amount of 20g~30g per powder package, wrap them in aluminum foil for use; melt 7055 aluminum alloy in a crucible furnace When the t...

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Abstract

The invention relates to an aluminum-base composite material, particularly a novel particle-reinforced aluminum-base composite material and a preparation method thereof. The preparation method comprises the following steps: adding micro / nano MgO and one or more of SiO2, TiO2 and ZrO2 into a pure aluminum or aluminum alloy base, and carrying out melt direct reaction to prepare the Al2O3 / MgO.Al2O3 (magnesia alumina spinel) hybrid oxide particle-reinforced aluminum-base composite material. The Al2O3 particle size is on the nano level, and the magnesia alumina spinel particle size is on the micro / nano level, thereby implementing multi-scale hybrid oxide particle reinforcement. The particle volume percent is calculated according to the stoichiometric formula, and the proper particle total volume percent is 2-4 vol.%. The prepared composite material has the characteristics of low cost, high strength, high wear resistance, low thermal expansivity and low residual stress, and is a novel aluminum-base composite material system.

Description

technical field [0001] The invention relates to an aluminum-based composite material, in particular to a design and preparation method of a novel particle-reinforced aluminum-based composite material, and belongs to the field of new material preparation. Background technique [0002] Aluminum matrix composites combine the advantages of aluminum matrix and composite phase, and have comprehensive excellent performance such as high strength, high modulus, high wear resistance, and low expansion. They have attracted much attention in the research of new materials. When particles are used as reinforcing phase It has the characteristics of good anisotropy, good particle rounding, uniform dispersion, and uniform stress dispersion when external force is applied. Therefore, research on new particle-reinforced aluminum matrix composites has attracted much attention in the industry. [0003] The main types of existing reinforcement phases are as follows, including (1) oxides, such as a...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/10
Inventor 李桂荣王宏明
Owner JIANGSU UNIV
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