In-situ grain reinforced high temperature aluminium base composite material

An aluminum-based composite material and particle-reinforced technology, which is applied in the field of composite materials, can solve the problems of complex process, little improvement in high-temperature performance, and high cost, and achieve the effects of wide application prospects, simple preparation process, and good stability

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum matrix composites prepared by adding particles have defects such as poor wettability between reinforcing particles and the matrix, difficulty in controlling interfacial reactions, uneven distribution of reinforcing particles, etc., which affect the performance of aluminum matrix composites
In aviation, aerospace, automobile and other industrial fields, aluminum alloys have been widely used due to their high specific strength, specific modulus and good thermal properties. In an environment with a certain working temperature, the application of aluminum alloy is greatly limited
[0003] After searching the literature of the prior art, it was found that Wu Jing, Li Wenfang, and Meng Jilong published in "Journal of South China University of Technology" 2003, 31(2): 62-65 "Mechanical mechanism of aluminum silicate short fiber / ZL109 composite material". Performance", this paper prepared aluminum silicate short fiber reinforced ZL109 matrix composite material, the high temperature performance of this type of composite material is improved compared with the matrix, but not very obvious; and when the volume fraction of aluminum silicate short fiber is 10%, The high temperature performance of the composite material is improved very little, only 13% at 200°C, it is prepared by pressure impregnation, the particles need to be prepared in advance, the process is more complicated, and the cost is high; Interfacial compatibility with matrix is ​​not very good; aluminum silicate short fiber reinforced / ZL109 composites are not remeltable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In-situ particle-reinforced high-temperature-resistant aluminum-based composite material component weight percent: 11% Si, 0.5% Mg, 0.8% Cu, 0.8% Ni, 1% TiB 2 , and the rest are Al.

[0013] The preparation process of the composite material includes: melting aluminum alloy in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, Mg, Al-Ni and Al-Cu are added, left standing in vacuum, slag is removed, and then formed under low pressure.

[0014] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good. The mechanical properties of the material T6 state:

[0015] 25°C: σ b =345MPa, σ 0.2 =284MPa, δ=1.9%, E=76GPa,

[0016] 200°C: σ b =277MPa, σ 0.2 =215MPa, δ=2.6%, E=76GPa,

[0017] 30...

Embodiment 2

[0019] In-situ particle-reinforced high-temperature-resistant aluminum-based composite material component weight percent: 13% Si, 1.5% Mg, 1.3% Cu, 1.5% Ni, 20% TiB 2 , and the rest are Al.

[0020] The preparation process of the composite material includes: melting aluminum alloy in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, Mg, Al-Ni and Al-Cu are added, left standing in vacuum, slag is removed, and then formed under low pressure.

[0021] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good. The mechanical properties of the material T6 state:

[0022] 25°C: σ b =401MPa, σ 0.2 =364MPa, δ=0.9%, E=108GPa,

[0023] 200°C: σ b =367MPa, σ 0.2 =295MPa, δ=1.6%, E=105GPa,

[0024]...

Embodiment 3

[0026] In-situ particle-reinforced high-temperature-resistant aluminum-based composite material component weight percent: 12% Si, 1.0% Mg, 1.0% Cu, 1.0% Ni, 10% TiB 2 , and the rest are Al.

[0027] The preparation process of the composite material includes: melting aluminum alloy in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, Mg, Al-Ni and Al-Cu are added, left standing in vacuum, slag is removed, and then formed under low pressure.

[0028] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good. The mechanical properties of the material T6 state:

[0029] 25°C: σ b =413MPa, σ 0.2 =389MPa, δ=1.3%, E=94.8GPa,

[0030] 200°C: σ b =377MPa, σ 0.2 =287MPa, δ=1.8%, E=95.0GPa,

[003...

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Abstract

The present invention relates to material technology, and the in-situ grain reinforced high temperature aluminum-base composite material consists of Si 11-13 wt%, Mg 0.5-1.5 wt%, Cu 0.8-1.3 wt%, Ni 0.5-1.5 wt%, and TiB2 1-20 wt% except Al. The composite material of the present invention has reinforcing TiB2 grains with size of 50-250 nm and in hexagon and rectangle mainly. The composite material has clean interface and excellent combination between the matrix and the TiB2 grains, modulus of 74-108 GPa, tensile strength of 215-295 MPa at 200 deg.c and 79-149 MPa at 300 deg.c. The high temperature aluminum-base composite material may find its wide application in automobile, aeronautics and astronautics fields.

Description

technical field [0001] The invention relates to a composite material in the technical field of materials, in particular to an in-situ particle-reinforced high-temperature-resistant aluminum-based composite material. Background technique [0002] Aluminum matrix composites have high specific strength, specific stiffness and specific modulus, and are widely used in aerospace, aviation, national defense and electronics industries. Aluminum matrix composites prepared with external particles have defects such as poor wettability between reinforcing particles and the matrix, difficult control of interface reaction, uneven distribution of reinforcing particles, etc., which affect the performance of aluminum matrix composites. In aviation, aerospace, automobile and other industrial fields, aluminum alloys have been widely used due to their high specific strength, specific modulus and good thermal properties. In an environment with a certain working temperature, the application of a...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22C21/02
Inventor易宏展王浩伟马乃恒李险峰张亦杰
OwnerSHANGHAI JIAO TONG UNIV