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Graphene reinforced titanium-based composite and preparation method thereof

A titanium-based composite material and graphene technology, applied in the field of composite materials, can solve the problems of structural damage and easy agglomeration of graphene powder, and achieve the effects of high density, low impurity content, and high specific elastic modulus

Active Publication Date: 2015-12-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, graphene-reinforced metal matrix composites will encounter a series of problems during sintering, such as graphene powder is very easy to agglomerate, if amphoteric surfactant is added, it will lead to the introduction of impurities, and it is easy to be damaged in the ball milling stage of powder metallurgy. structural damage
In addition, the research on graphene-reinforced titanium-based composites has not been reported yet.

Method used

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  • Graphene reinforced titanium-based composite and preparation method thereof
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  • Graphene reinforced titanium-based composite and preparation method thereof

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preparation example Construction

[0030] Preparation of pure titanium: mix titanium powder with absolute ethanol and ultrasonically disperse for 20 to 30 minutes; then, transfer to a ball mill jar and add ball milling beads, wherein the mass ratio of ball milling beads to titanium powder is 5 to 6:1. Ball mill at ~350r / min for 0.4~2.5h; then remove the absolute ethanol in the slurry after ball milling to obtain a powder; dry the obtained powder in a vacuum oven at 90~120°C for 10~12h to obtain a dried powder ;Put the dried powder into the graphite mold, and pad the inside of the mold with graphite paper; pass argon gas in the hot-press furnace, and apply a pressure of 2-2.12t to the graphite mold, and heat it at a heating rate of 10-12°C / min to 900-1300°C, heat preservation for 1-1.5h, then naturally cool to room temperature, and the product in the graphite mold is the pure titanium. Except that no graphene powder is added, the preparation of pure titanium is the same as other process conditions for preparing ...

Embodiment 1

[0036] 0.11437g of graphene powder with a volume fraction of 1.80% and 200mL of absolute ethanol were mixed and ultrasonically dispersed for 30min, and then 25.0376g of titanium powder with a volume fraction of 98.20% was added under stirring to obtain a mixed slurry; the obtained mixed slurry Transfer to a ball mill jar, add 125.76g of zirconia ceramic ball milling beads, mill at 300r / min for 0.4h, use a rotary evaporator to remove the absolute ethanol in the slurry after ball milling at 75°C at 65r / min to obtain a powder; The powder was dried in a vacuum oven at 90°C for 12 hours to obtain a dried powder; the obtained dried powder was put into a graphite mold, argon was passed through the hot-press furnace, and a pressure of 2.12t was applied to the graphite mold to Heat up to 900°C at a heating rate of 12°C / min, and cool down to room temperature naturally after holding for 1 hour. The product in the graphite mold has a volume of Graphene-reinforced titanium matrix composit...

Embodiment 2

[0040]0.11387g of graphene powder with a volume fraction of 1.90% and 200mL of absolute ethanol were mixed and ultrasonically dispersed for 20min, and then 25.0186g of titanium powder with a volume fraction of 98.10% was added under stirring to obtain a mixed slurry; the obtained mixed slurry Transfer to a ball milling jar, add 125.09g of zirconia ceramic ball milling beads, mill at 350r / min for 2.5h, use a rotary evaporator to remove the absolute ethanol in the slurry after ball milling at 75°C at 65r / min to obtain a powder; Dry the powder in a vacuum drying oven at 90°C for 12 hours to obtain a dried powder; put the obtained dried powder into a graphite mold, pass argon gas in the hot-press furnace, and apply a pressure of 2t to the graphite mold, with 10 The heating rate of ℃ / min is heated to 1150 ℃, and after 1.5 hours of heat preservation, it is naturally cooled to room temperature. The product in the graphite mold has a volume of Graphene-reinforced titanium matrix comp...

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Abstract

The invention relates to a graphene reinforced titanium-based composite and a preparation method thereof and belongs to the field of composites. The preparation method of the composite comprises the following steps of mixing graphene powder with absolute ethyl alcohol, then conducting ultrasonic dispersion, adding titanium powder in the stirring process, and obtaining mixed slurry; transferring the obtained mixed slurry into a ball milling pot, and conducting ball milling; removing the absolute ethyl alcohol from the slurry obtained after the ball milling, and obtaining powder; drying the obtained powder in a vacuum drying oven, and obtaining dried powder; placing the dried powder into a graphite die, introducing argon into a hot pressing furnace, applying 2-2.12 t of pressure to the graphite die, conducting heating till the temperature reaches 900-1300 DEG C at the heating rate of 10-12 DEG C / min, preserving the heat for 1-1.5 hours, conducting natural cooling till the room temperature is reached, and obtaining the graphene reinforced titanium-based composite, namely the product in the graphite die. The preparation method is simple in process, graphene is distributed uniformly in the obtained composite, and the impurity content is low.

Description

technical field [0001] The invention relates to a graphene-reinforced titanium-based composite material and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Titanium and titanium alloys have the characteristics of low density, high strength, high and low temperature resistance, and corrosion resistance; their outstanding performance makes titanium and titanium alloys become ideal materials for military industry, aerospace, navigation, automobile, petrochemical, biomedicine and other industries , thus becoming an ideal matrix for composite materials. [0003] Graphene is a carbon atom with sp 2 The two-dimensional carbon material in the form of hybridization has excellent electrical conductivity, thermal conductivity, and mechanical properties. Its elastic modulus and tensile strength can reach 1.05Tpa and 130Gpa respectively. Graphene-reinforced metal-matrix composites (Gr-MMCs), such as Al-, Ni-, Mg-, and Cu-based...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/10C22C1/05
Inventor 张洪梅穆啸楠才鸿年范群波傅铸杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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