Graphene reinforced titanium-based composite material characterized by three-dimensional network-shaped distribution, preparation method thereof and application thereof

A titanium-based composite material and three-dimensional network technology, which is applied in the field of metal-based composite materials, can solve the problems of difficult network distribution, increase of titanium oxygen content, material quality decline, etc. small effect

Active Publication Date: 2018-12-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the titanium-based composite materials with network-like reinforcement phase mainly use in-situ self-generated TiB 2 Micron-sized fibers, such as Huang Junjun's patent "a two-stage network structure Ti-based composite material and its preparation method" CN104911399B patent, wherein the preparation method of reinforcement network distribution mainly adopts the preparation method of ball milling and powder mixing, but the long-term Ball milling for a long time will introduce impurities such as iron, increase the oxygen content of titanium, and reduce the quality of the material, which is not an ideal network distribution preparation method
However, the network distribution of nanometer-sized particles such as graphene is difficult, and there is no report on graphene-reinforced titanium-based composite materials with controllable network distribution in the prior art.

Method used

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  • Graphene reinforced titanium-based composite material characterized by three-dimensional network-shaped distribution, preparation method thereof and application thereof
  • Graphene reinforced titanium-based composite material characterized by three-dimensional network-shaped distribution, preparation method thereof and application thereof
  • Graphene reinforced titanium-based composite material characterized by three-dimensional network-shaped distribution, preparation method thereof and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Spark plasma technology sinters to produce graphene-reinforced titanium-based composite materials, using carboxylated graphene powder and spherical Ti6Al4V (TC4) powder as raw materials, in which the thickness of graphene sheets is 1-5nm, the diameter is 0.1-10μm, and the particle size of titanium powder is 180μm (80 mesh), nano powder and micro powder respectively. A cylindrical composite material sintered body with a diameter of 10 mm and a height of 12 mm was fabricated.

[0043] Specific steps are as follows:

[0044] (1) Weigh 2.5g of PVA powder and place it in a beaker, add deionized water, heat at 80°C for 1h with magnetic stirring to make a 5% PVA aqueous solution; weigh 10g of 180 μm TC4 powder (purity is 99%) and mass fraction 0.5wt% carboxylated graphene powder.

[0045] (2) Add TC4 powder into PVA aqueous solution, stir for 5 hours, wash with deionized water, and vacuum dry at 60°C for 2 hours. Then the TC4 powder coated with PVA is placed in a beaker, an...

Embodiment 2

[0051] Spark plasma sintering technology produces network-like graphene-reinforced titanium-based composite materials, using graphene powder and spherical pure titanium powder as raw materials (purity is 99.5%), in which graphene sheets are 5-10nm thick and 10-20μm in diameter, pure titanium powder The particle size is 250 μm. A cylindrical composite material sintered body with a diameter of 20 mm and a height of 12 mm was fabricated.

[0052] Specific steps are as follows:

[0053] (1) Weigh 5g of PVA powder and place it in a beaker, add deionized water, heat at 80°C and stir magnetically for 3h to make a PVA aqueous solution with a mass fraction of 3%; weigh 20g of 106 μm pure titanium powder (purity is 99%) and mass Carboxylated graphene powder with a fraction of 1 wt%.

[0054] (2) Add pure titanium powder into PVA aqueous solution, stir for 3 hours, wash with deionized water, and vacuum dry at 60° C. for 2 hours. Then the pure titanium powder coated with PVA is placed ...

Embodiment 3

[0060]Hot-pressing sintering technology produces network graphene-reinforced titanium-based composite materials. Graphene powder and irregular titanium-nickel alloy powder are used as raw materials. The size is 13 μm (1000 mesh), and a cylindrical composite material sintered body with a diameter of 30 mm and a height of 20 mm is produced. Specific steps are as follows:

[0061] (1) Weigh 5g of PVA powder and place it in a beaker, add deionized water, heat at 100°C for 3h with magnetic stirring to make a PVA aqueous solution with a mass fraction of 10%; weigh 70g of 13 μm titanium-molybdenum powder (purity is 99.5%) and mass fraction It is 1.5wt% carboxylated graphene powder.

[0062] (2) Add titanium-molybdenum powder into PVA aqueous solution, stir for 12 hours, wash with deionized water, and vacuum-dry at 60° C. for 3 hours. Then put the titanium-molybdenum powder coated with PVA in a beaker, add 30ml of acetone to form a uniform dispersion; put the graphene powder with a ...

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Abstract

The invention discloses a graphene reinforced titanium-based composite material characterized by three-dimensional network-shaped distribution, a preparation method of the graphene reinforced titanium-based composite material and application of the graphene reinforced titanium-based composite material. The graphene reinforced titanium-based composite material is mainly characterized in that titanium or titanium alloy serves as a titanium base, graphene serves as the reinforced phase, and the graphene is uniformly distributed around titanium base particles to form a three-dimensional network-shaped structure in the microstructure of the composite material, namely, the graphene reinforced titanium-based composite material is similar to a graphene reinforced titanium-based composite materialwhich is formed in the mode that the titanium base particles are placed in meshes of the graphene three-dimensional network-shaped structure in a filled mode and are completely compact. According to the graphene reinforced titanium-based composite material, a method of a cross-linking reaction is adopted, and therefore the graphene well covers the surfaces of the titanium base particles, the problems that by the adoption of a conventional ball milling method, impurities are prone to being guided into materials, and uniform covering of the graphene is difficult to achieve are solved, and a graphene reinforced titanium-based composite material block characterized by three-dimensional network-shaped distribution is obtained through sintering molding. The graphene reinforced titanium-based composite material has the high strength, the high plasticity and the excellent comprehensive mechanical properties, and can be applied to the fields of national defense military industries, such as theaerospace field and the ship and naval vessel field.

Description

technical field [0001] The invention relates to a graphene-reinforced titanium-based composite material distributed in a three-dimensional network and a preparation method and application thereof, belonging to the technical field of metal-based composite materials. Background technique [0002] Titanium and titanium alloys have the characteristics of high strength, low density, heat resistance, corrosion resistance and good formability. Titanium alloy is the main structural material of aircraft and spacecraft. It is the material of choice for important components such as aero-engine fans, compressor discs and blades. It has also been used in aerospace fields such as tactical missiles, satellites, and launch vehicles. With the further development of the aerospace industry, higher requirements are put forward for the comprehensive performance of titanium alloy materials. At the same time, titanium and titanium alloys also have major problems such as poor wear resistance, low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/05C22C32/00
CPCC22C1/05C22C14/00C22C32/0084
Inventor 张法明王娟刘腾飞
Owner SOUTHEAST UNIV
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