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A flame-retardant graphene titanium-aluminum matrix composite material and preparation method thereof

A composite material and graphene technology, applied in the field of titanium alloy materials, can solve the problems of inability to mix graphene, graphene is easy to agglomerate, and chemical reactions occur, and achieve the effects of improved tensile strength, uniform organization, and accurate parameter control.

Active Publication Date: 2020-06-09
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene itself is easy to agglomerate and chemically reacts with titanium at very low temperatures, which restricts its large-scale application in titanium-aluminum-based alloys.
In the current published literature reports, the use of "ball milling element mixing method + spark plasma sintering" or "dry mixing + spark plasma sintering" and other technologies cannot evenly mix graphene into titanium-aluminum-based alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Spherical or nearly spherical alloy powder with a particle size of 30-105 μm and an oxygen content of less than 1000 ppm was prepared by argon atomization, and its nominal composition was Ti-46Al-5Nb-2Cr (atomic percentage, at%); 1.5 g Add graphene oxide nanosheets to 500ml of absolute ethanol, and use an ultrasonic cell pulverizer to disperse for 40 minutes. The working frequency is vibration 2s, gap 3s, to obtain a graphene oxide solution, and then mix 998.5g of the above alloy powder with the graphene oxide solution Stirring and mixing in a temperature-controlled mechanical stirrer, the stirring speed is 500-600r / min, the stirring time is 50-80min, and the stirring temperature is 60°C to prepare a slurry of graphene oxide and titanium-aluminum compound mixed powder, and Dry in an oven at 50-60°C for 5-10 hours to obtain a mixed powder of graphene oxide and titanium-aluminum compound and put it into a stainless steel sheath for vacuuming treatment. Vacuumize at room te...

Embodiment 2

[0036] Spherical or nearly spherical alloy powder with a particle size of 53-104 μm and an oxygen content of less than 1000 ppm was prepared by argon atomization, and its nominal composition was Ti-46Al-4Nb-1.6Cr-0.2Ta-0.1B-0.1Si ( Atomic percentage, at%); 0.5g graphene oxide nanosheets were added to 200ml absolute ethanol, and the ultrasonic cell pulverizer was used to disperse for 30min, the working frequency was vibration 2s, gap 3s, to obtain graphene oxide solution, and then 999.5g of the above-mentioned alloy powder and graphene oxide solution were stirred and mixed in a temperature-controlled mechanical stirrer, the stirring speed was 500-600r / min, the stirring time was 50-80min, and the stirring temperature was 60°C to prepare graphene oxide and titanium The slurry of aluminum-based compound mixed powder is dried in an oven at 50-60°C for 5-10 hours, and the mixed powder of graphene oxide and titanium-aluminum compound is obtained and put into a stainless steel sheath f...

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Abstract

The invention belongs to the technical field of titanium alloy materials, and relates to a flame-retardant graphene titanium-aluminum-based composite material and a preparation method. The composite material is prepared from the following components in percentage by mass: 0.01 to 1 percent of graphene oxide and a titanium and aluminum compound. By adoption of a method of combining temperature-controlled mechanical stirring, vacuumizing treatment, hot isostatic pressing and the like, interface bonding characteristics of graphene oxide and titanium and aluminum compound mixed powder are improved, and the bulk density and the subsequent forming property of the mixed powder are improved; furthermore, the graphene oxide is basically decomposed to form graphene which is uniformly dispersed, so that the excellent mechanical property and the physical and chemical properties of the graphene are fully exerted; the flame retardant property of the obtained composite material is twice that of a common high-temperature titanium alloy or above, and the heat resistance is higher; and a brand-new technical scheme is provided for solving titanium fire of an aero-engine. The flame-retardant graphenetitanium-aluminum-based composite material is a novel material concept; a prepration process is short, can accurately control parameters, and is suitable for batch preparation.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and relates to a titanium-based composite material and a preparation method, in particular to a flame-retardant graphene titanium-aluminum-based composite material and a preparation method. Background technique [0002] The sharp contradiction between the high-performance advanced aero-engine's demand for increased titanium consumption and the increased tendency of titanium fires is prominent, resulting in frequent titanium fire accidents. Effectively preventing titanium fire and increasing the amount of titanium in the compressor is one of the major problems facing advanced aero-engine technology at present and in the future. [0003] Titanium-aluminum compound materials have become one of the most potential materials for high-temperature structural applications of advanced aero-engines due to their high creep resistance and high flame retardancy. They are used for key component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/05
CPCC22C1/05C22C14/00C22C30/00
Inventor 弭光宝曹京霞黄旭
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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