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A kind of three-dimensional continuous network structure ti3alc2/al matrix composite material and its preparation method without pressure impregnation

A technology of network structure and composite materials, applied in the field of three-dimensional continuous network structure Ti3AlC2/Al-based composite materials and its pressureless infiltration preparation, can solve problems such as strengthening Al-based composite materials

Active Publication Date: 2019-01-15
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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  • A kind of three-dimensional continuous network structure ti3alc2/al matrix composite material and its preparation method without pressure impregnation
  • A kind of three-dimensional continuous network structure ti3alc2/al matrix composite material and its preparation method without pressure impregnation

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] The Al-based alloy powder is loaded into the mold, and the pre-compression is 60MPa, and it is pressed into an Al-based alloy blank. Smear boron nitride in the corundum crucible, load the pre-pressed Al-based alloy blank, put the crucible into the vacuum sintering furnace, and under the protection of argon, increase the furnace temperature to 10℃ / min at the heating rate 700 ℃, heat preservation for 10 min, after the furnace temperature is lowered to 80 ℃, 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 spread around the preform. Put the corundum crucible into a vacuum sintering furnace, and under vacuum, raise the temperature to 750°C at a heating rate of 10°C / min. At the beginning of 10min of heat preservation, the vacuuming was stopped, and at the same time, argon gas was introduced into the...

Embodiment approach 2

[0024] The Al-based alloy powder is loaded into the mold, and the pre-compression is 70MPa, and it is pressed into an Al-based alloy blank. Smear boron nitride in the corundum crucible, load the pre-pressed Al-based alloy blank, put the crucible into the vacuum sintering furnace, and under the protection of argon, at a heating rate of 15 °C / min, the furnace temperature is raised to 750 ℃, hold for 15 minutes, and after the furnace temperature is lowered to 80 ℃, open the furnace and take out the Al-based alloy ingot. Porous Ti with a porosity of 40% 3 AlC2 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 850°C at a 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,...

Embodiment approach 3

[0027] 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 30min, 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 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 minutes. 3 AlC 2 ...

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Abstract

A three-dimensional continuous network structure titanium-aluminum-carbon / aluminum-based composite material and a preparation method thereof by pressureless infiltration. The volume content of Ti3AlC2 in the material is 20-80vol%, and the rest is Al-based alloy. The microstructure of the material is that the ceramic phase Ti3AlC2 and the metal phase Al-based alloy are continuously distributed in three-dimensional space, and the space is a network intersection structure, and the interface between the two is firmly combined. The preparation method of the material: put the Ti3AlC2 preforms with different porosities in the corundum crucible, put the pre-sintered Al-based alloy ingot above it, and raise the temperature to 750-1100 °C at 10-30 °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 0.5-1 Bar, the heat preservation time is 30-120 minutes, and it is cooled to room temperature at 10-30°C / min to obtain a three-dimensional continuous network structure Ti3AlC2 / Al Matrix composite material; this material has the remarkable characteristics of light weight, high strength, high wear resistance, etc., and can be widely used in the manufacture of parts in the fields of automobiles, transportation, aerospace, military industry, and machinery manufacturing.

Description

technical field [0001] The invention relates to a three-dimensional continuous network structure Ti 3 AlC 2 / Al matrix composite material and preparation method thereof by pressureless infiltration. Background technique [0002] Research on aluminum matrix composites began in the 1950s. In the past 20 years, great achievements have been made theoretically and technically. The current research on aluminum matrix composites mainly focuses on two aspects: (1) composite materials with excellent properties reinforced with continuous fibers, and the application scope is concentrated in the aerospace and military fields; (2) composite materials reinforced with discontinuous reinforcements have Composite materials with excellent performance, used in automobile manufacturing. my country has carried out a more comprehensive research on aluminum matrix composites, including fiber reinforcement, particle reinforcement, lamination, spray deposition, in-situ generation, etc., and has ...

Claims

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Application Information

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Patent Type & Authority Patents(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