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In-situ endogeny multi-phase particle enhanced aluminum-based composite material and preparing method thereof

A particle-reinforced aluminum and composite material technology, applied in the field of metal matrix composite materials, can solve the problems of inability to effectively control the content of reinforced particles, difficult to distribute the reinforced phase uniformly, and inability to mass-produce, and achieve good comprehensive mechanical properties and high bonding strength. , thermodynamically stable effect

Active Publication Date: 2019-07-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is complicated and cannot be produced on a large scale; and KBF is used in the preparation 4 and K 2 TiF 6 will generate AlF 3 ,polluted environment
The Chinese patent with the publication number CN 109402441A discloses a method of preparing AlN and Al with ultrafine aluminum powder and air as raw materials. 2 o 3 The method of particle-reinforced aluminum matrix composites, but this method cannot effectively control the content of reinforcing particles, and the reinforcing phase is difficult to distribute evenly on the matrix, limited by equipment, and cannot be mass-produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) First prepare the required raw materials according to the following mass percentages: industrial pure aluminum powder 94.0 (size ≤ 50 μm), boron nitride powder 3.0 (size ≤ 2 μm), zirconia powder 3.0 (size ≤ 2 μm);

[0021] (2) Weigh the materials in step (1) in proportion, first aluminum powder and zirconia powder are ball milled at low speed (ball mill speed 100r / min) for 2h, then add boron nitride powder for high speed ball milling (ball mill speed 300r / min) 8h, the above two steps of ball milling are all carried out under an argon atmosphere, and the ball-to-material ratio is set at 4:1;

[0022] (3) degassing the material after the two-step ball milling in step (2), and pressing it into a prefabricated body in a cold isostatic press;

[0023] (4) The solid-liquid sequential sintering method is adopted, that is, the prefabricated body is put into a vacuum sintering furnace, and the vacuum degree is set to 5×10 - 5 Pa, first solid-phase sintering controls the si...

Embodiment 2

[0026] (1) First prepare the required raw materials according to the following mass percentages: industrial pure aluminum powder 78.0 (size ≤ 50 μm), boron nitride powder 10.0 (size ≤ 2 μm), zirconia powder 12.0 (size ≤ 2 μm);

[0027] (2) Weigh the materials in step (1) in proportion, first aluminum powder and zirconia powder are ball milled at low speed (ball mill speed 100r / min) for 4h, then add boron nitride powder for high speed ball milling (ball mill speed 300r / min) 18h, the above two steps of ball milling are all carried out under an argon atmosphere, and the ball-to-material ratio is set at 5:1;

[0028] (3) degassing the material after the two-step ball milling in step (2), and pressing it into a prefabricated body in a cold isostatic press;

[0029] (4) The solid-liquid sequential sintering method is adopted, that is, the prefabricated body is put into a vacuum sintering furnace, and the vacuum degree is set to 5×10 - 5 Pa, first solid-phase sintering controls the...

Embodiment 3

[0032] (1) First prepare the required raw materials according to the following mass percentages: industrial pure aluminum powder 50.0 (size ≤ 6 μm), boron nitride powder 22.0 (size ≤ 2 μm), zirconia powder 28.0 (size ≤ 2 μm);

[0033] (2) Weigh the materials in step (1) in proportion, firstly aluminum powder and zirconia powder are ball milled at low speed (ball mill speed 100r / min) for 6h, then add boron nitride powder for high speed ball milling (ball mill speed 300r / min) 40h, the above two steps of ball milling are all carried out under an argon atmosphere, and the ball-to-material ratio is set at 6:1;

[0034] (3) degassing the material after the two-step ball milling in step (2), and pressing it into a prefabricated body in a cold isostatic press;

[0035] (4) The solid-liquid sequential sintering method is adopted, that is, the prefabricated body is put into a vacuum sintering furnace, and the vacuum degree is set to 5×10 - 5 Pa, first solid-phase sintering to control ...

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Abstract

The invention belongs to the field of metal-based composite materials, and relates to an in-situ endogeny multi-phase particle enhanced aluminum-based composite material and a preparing method thereof. The aluminum-based composite material is characterized in that in-situ generated nano-scale ZrB2, AlN and Al2O3 particles are evenly distributed on an aluminum matrix; the mass percent of ZrB2 is 1.8-27.5, and the size is 50-300 nm; the mass percent of AlN is 3.3-41.3, and the size is 10-50 nm; and the mass percent of Al2O3 is 1.1-16.5, and the size is 10-100 nm. The preparing method of the in-situ endogeny multi-phase particle enhanced aluminum-based composite material comprises the steps that double-speed ball milling is conducted under the argon atmosphere, a prefabricated body is formedthrough pressing in a cold / heat isostatic pressing machine, a solid-liquid sequential sintering method is adopted, and the ZrB2, AlN and Al2O3 multi-phase particle enhanced aluminum-based composite material is obtained. The surface of the prepared material is clean and free of pollution, and the bonding strength between the prepared material and the matrix is high; and the enhanced particles are evenly distributed on the matrix, and the phenomenon of clustering is avoided. The particles different in scale have the synergetic enhancement effect, and good comprehensive mechanical performance isshown.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and in particular relates to an in-situ endogenous multi-phase particle reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Aluminum matrix composites have the characteristics of low density, high specific strength, corrosion resistance and easy processing, and have important application value in aerospace, automotive, military and marine engineering fields. In order to meet the needs of aluminum-based composite materials for comprehensive performance, the present invention designs a new type of aluminum-based composite material with controllable comprehensive performance, which has comprehensive advantages such as good high-temperature strength, good volume stability, good rigidity, and good wear resistance. , and developed a preparation method with low cost and simple process. [0003] Particle-reinforced aluminum matrix co...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05C22C1/10B22F3/10
CPCB22F3/1017B22F3/1035C22C1/05C22C21/00C22C32/0005
Inventor 高通卞一涵刘相法
Owner SHANDONG UNIV
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