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In-situ synthesized aluminum carbide reinforced aluminum matrix composite material and preparation method thereof

A composite material and a technology for reinforced aluminum matrix, which is applied in the field of in-situ synthesis of aluminum carbide Al4C3 reinforced aluminum matrix composite material and its preparation, which can solve the problems such as thermal stability and high temperature mechanical properties of composite materials that are not given, and achieve improved interface lubrication. Effects of wet and interfacial bond strength, high tensile strength and thermal stability, high room temperature strength and high temperature mechanical properties

Active Publication Date: 2020-06-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent with the publication number CN 109680188 A discloses an aluminum oxide layer-coated nano-aluminum carbide particle-reinforced aluminum-based composite material and its preparation method, using graphite powder and activated carbon as carbon sources to react to obtain composite reinforcement of alumina and aluminum carbide. The aluminum matrix composite material, this method does not give the thermal stability and high temperature mechanical properties of the composite material

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  • In-situ synthesized aluminum carbide reinforced aluminum matrix composite material and preparation method thereof
  • In-situ synthesized aluminum carbide reinforced aluminum matrix composite material and preparation method thereof
  • In-situ synthesized aluminum carbide reinforced aluminum matrix composite material and preparation method thereof

Examples

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Embodiment 1

[0028] This embodiment provides a kind of in situ synthesis Al 4 C 3 Reinforced aluminum matrix composites, including aluminum powder and graphene powder, the volume fraction of graphene powder is 0.8%, and aluminum powder and graphene powder generate nanoscale Al with dispersed distribution through in-situ reaction 4 C 3 , nanoscale Al 4 C 3 It is distributed in the composite material in two forms, one of which is that the two ends of the rod-shaped shape grow into the two aluminum grains respectively, pinning two adjacent aluminum grains, and the other is that the two ends of the rod-shaped shape grow along the crystal grains. Boundary arrangement can effectively prevent dislocation and grain boundary migration.

[0029] In-situ synthesis of Al in the foregoing examples 4 C 3 Reinforced aluminum matrix composites can be prepared by the following methods, including the following specific steps:

[0030] S1: Choose aluminum powder with a ball diameter of 200 mesh and gr...

Embodiment 2

[0035] This embodiment provides a kind of in situ synthesis Al 4 C 3 Reinforced aluminum matrix composites, including aluminum powder and graphene powder, the volume fraction of graphene powder is 1.5%, and aluminum powder and graphene powder generate nanoscale Al with dispersed distribution through in-situ reaction 4 C 3 , nanoscale Al 4 C 3 It is distributed in the composite material in two forms, one of which is that the two ends of the rod-shaped shape grow into the two aluminum grains respectively, pinning two adjacent aluminum grains, and the other is that the two ends of the rod-shaped shape grow along the crystal grains. Boundary arrangement can effectively prevent dislocation and grain boundary migration.

[0036] In-situ synthesis of Al in the foregoing examples 4 C3 Reinforced aluminum matrix composites can be prepared by the following methods, including the following specific steps:

[0037] S1: Select aluminum powder with a ball diameter of 200 mesh and grap...

Embodiment 3

[0045] This embodiment provides a kind of in situ synthesis Al 4 C 3 Reinforced aluminum matrix composites, including aluminum powder and graphene powder, the volume fraction of graphene powder is 2%, and aluminum powder and graphene powder generate nanoscale Al with dispersed distribution through in-situ reaction 4 C 3 , nanoscale Al 4 C 3 It is distributed in the composite material in two forms, one of which is that the two ends of the rod-shaped shape grow into the two aluminum grains respectively, pinning two adjacent aluminum grains, and the other is that the two ends of the rod-shaped shape grow along the crystal grains. Boundary arrangement can effectively prevent dislocation and grain boundary migration.

[0046] In-situ synthesis of Al in the foregoing examples 4 C 3 Reinforced aluminum matrix composites can be prepared by the following methods, including the following specific steps:

[0047] S1: Select aluminum powder with a spherical diameter of 1-2 μm and a...

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Abstract

The invention provides an in-situ synthesized aluminum carbide reinforced aluminum matrix composite material and a preparation method thereof. The composite material comprises aluminum powder and graphene powder, the aluminum powder and the graphene powder generate dispersedly-distributed nano-scale Al4C3 through in-situ reaction, and the nano-scale Al4C3 is distributed in the composite material in two forms. In one form, the two ends of the nano-scale Al4C3 in a rod-shaped form grow into two aluminum crystal grains and pin two adjacent aluminum crystal grains; and in the other form, the nano-scale Al4C3 is arranged along the grain boundary in the rod-shaped length direction, and dislocations and grain boundary migration can be effectively prevented. On one hand, the nano-scale Al4C3 effectively pins the grain boundary migration of a Al matrix, the strength of the Al matrix is kept, meanwhile, the Al4C3 serves as a hard reinforcing phase, the composite material has high room temperature strength and high-temperature mechanical properties due to stress bearing and the Orowan effect, and the composite material has wide application prospects in the fields of high service temperature conditions such as aerospace and the like.

Description

technical field [0001] The invention relates to the technical field of heat-resistant metal matrix composite materials, in particular to an in-situ synthesis of aluminum carbide Al 4 C 3 Reinforced aluminum matrix composite material and its preparation method. Background technique [0002] Heat-resistant aluminum alloys are widely used in the aerospace field due to their high strength and good heat resistance. However, when the working temperature exceeds 200°C, the coarsening of the main strengthening phase significantly reduces the mechanical properties, and it is difficult to meet the requirements of the new generation of aircraft, propellers and other structural components for the operating temperature. Therefore, the development has higher room temperature strength and better Aluminum alloys and aluminum matrix composites with excellent damage resistance, excellent heat resistance and thermal stability have become one of the current research hotspots of aluminum alloy...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/05C22C1/10B22F9/04B22F3/14B22F3/105B22F3/20B22F3/18
CPCB22F3/105B22F3/14B22F3/18B22F3/20B22F9/04B22F2003/1051B22F2009/043C22C1/055C22C21/00
Inventor 高海燕李敏张驰王朦朦吕海洋王宇飞王俊孙宝德
Owner SHANGHAI JIAO TONG UNIV
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