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Three-dimensional continuous network structure titanium aluminum carbon/aluminum-based composite material and pressure-free infiltration preparation method thereof

A technology of network structure and composite materials, which is applied in the field of preparation of three-dimensional continuous network structure titanium-aluminum-carbon/aluminum-based composite materials and its pressureless infiltration, and can solve problems such as strengthening Al-based composite materials

Active Publication Date: 2017-11-03
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there is no report on the use of this new type of ceramic to reinforce Al-based composites

Method used

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  • Three-dimensional continuous network structure titanium aluminum carbon/aluminum-based composite material and pressure-free infiltration preparation method thereof
  • Three-dimensional continuous network structure titanium aluminum carbon/aluminum-based composite material and pressure-free infiltration preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] Put the Al-based alloy powder into the mold, pre-press 60MPa, and press it into an Al-based alloy body. Apply boron nitride in the corundum crucible, put it into the pre-pressed Al-based alloy body, put the crucible into the vacuum sintering furnace, and raise the furnace temperature to 700°C, keep warm for 10min, after the furnace temperature drops to 80°C, open the furnace and take out the Al-based alloy ingot. Porous Ti with a porosity of 20% 3 AlC 2 The preform is placed in a corundum crucible, a pre-fired Al-based alloy ingot is placed above it, and Al-based alloy powder is covered around it. Put the corundum crucible into a vacuum sintering furnace, and raise the temperature to 750°C at a heating rate of 10°C / min under vacuum. When the heat preservation starts for 10 minutes, stop vacuuming, and at the same time pass argon gas into the furnace, the pressure is 1 Bar, and the heat preservation time is 50 minutes. 3 AlC 2 / Al-based composites.

[0021] The abo...

Embodiment approach 2

[0023] Put the Al-based alloy powder into the mold, pre-press 70MPa, and press it into an Al-based alloy body. Smear boron nitride in the corundum crucible, put it into the pre-pressed Al-based alloy body, put the crucible into the vacuum sintering furnace, and raise the furnace temperature to 15°C / min under the protection of argon. 750°C, keep warm for 15min, after the furnace temperature drops to 80°C, open the furnace and take out the Al-based alloy ingot. Porous Ti with a porosity of 40% 3 AlC 2The preform is placed in a corundum crucible, a pre-fired Al-based alloy ingot is placed above it, and Al-based alloy powder is covered around it. Put the corundum crucible into a vacuum sintering furnace, and raise the temperature to 850°C at a heating rate of 15°C / min under vacuum. When the heat preservation starts for 20 minutes, stop vacuuming, and at the same time, pass argon gas into the furnace, the air pressure is 0.5 Bar, and the heat preservation time is 70 minutes. 3 ...

Embodiment approach 3

[0026] Put the Al-based alloy powder into the mold, pre-press 75MPa, and press it into an Al-based alloy green body. Smear boron nitride in the corundum crucible, put it into the pre-pressed Al-based alloy body, put the crucible into the vacuum sintering furnace, and raise the furnace temperature to 20°C / min under the protection of argon. 900°C, keep warm for 30 minutes, and after the furnace temperature drops to 80°C, open the furnace and take out the Al-based alloy ingot. Porous Ti with a porosity of 54% 3 AlC 2 The preform is placed in a corundum crucible, a pre-fired Al-based alloy ingot is placed above it, and Al-based alloy powder is covered around it. Put the corundum crucible into a vacuum sintering furnace, and raise the temperature to 950°C at a heating rate of 20°C / min under vacuum. When the heat preservation starts for 30 minutes, stop vacuuming, and at the same time, pass argon gas into the furnace, the pressure is 1 Bar, and the heat preservation time is 90 mi...

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Abstract

The invention discloses a three-dimensional continuous network structure titanium aluminum carbon / aluminum-based composite material and a pressure-free infiltration preparation method thereof. The material is prepared from the following components in percentage by volume: 20 to 80 percent of Ti3AlC2 and the balance of an Al-based alloy. A microscopic structure of the material is that a ceramic phase Ti3AlC2 and a metal phase Al-based alloy are continuously distributed in a three-dimensional space and form a network crossing structure in the space, and interface bonding between the ceramic phase and the metal phase is firm. The preparation method of the material comprises the following steps: putting Ti3AlC2 preforms with different porosities into a corundum crucibles, placing pre-burnt Al-based alloy ingots above the Ti3AlC2 preforms, and heating the crucibles under vacuum at 10 to 30 DEG C / min to 750 to 1,100 DEG C; and when heat preservation is started for 30 minutes, stopping vacuumizing, feeding argon into a furnace till the pressure is 0.5 to 1 Bar, preserving the heat for 30 to 120 minutes, and cooling the product at 10 to 30 DEG C / min to 10 to 30 DEG C, thus obtaining the three-dimensional continuous network structure Ti3AlC2 / Al-based composite material. The material has the outstanding characteristics of light weight, high intensity, high wear resistance and the like, and can be widely applied to part manufacturing in the fields of automobiles, transportation, aerospace, military industry, machine manufacturing and the like.

Description

technical field [0001] The invention relates to a three-dimensional continuous network structure titanium-aluminum-carbon / aluminum-based composite material and a pressureless impregnation preparation method thereof. Background technique [0002] The research on aluminum matrix composites began in the 1950s. In the past 20 years, great achievements have been made in theory and technology. The current research on aluminum matrix composites mainly focuses on two aspects: (1) composite materials with excellent properties reinforced by continuous fibers, and the application scope is concentrated in aerospace and military fields; (2) composite materials reinforced with discontinuous reinforcements Composite materials with excellent performance are used in the automobile manufacturing industry. my country has comprehensively carried out research work on aluminum matrix composites, including research on fiber reinforcement, particle reinforcement, laminated composites, spray depos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C32/00C22C21/00
CPCC22C1/1015C22C1/1036C22C21/00C22C32/0052C22C1/1021C22C1/1047
Inventor 黄振莺李新康翟洪祥王渊博蔡乐平胡文强沃少帅周洋于文波雷聪
Owner BEIJING JIAOTONG UNIV