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Preparation method of high-strength and high-plasticity titanium-graphene composite material

A composite material, graphene technology, applied in chemical instruments and methods, carbon compounds, energy efficiency improvement and other directions, can solve the problems of single type of TiC, difficult to obtain a large increase in strong plasticity, and large performance differences.

Active Publication Date: 2021-07-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the type of TiC formed is relatively single, mainly in the form of TiC with a core-shell structure, that is, a TiC hard layer of tens of microns is formed to wrap the titanium matrix. The performance of this type of composite material is quite different, especially at the grain boundary. The hardness is much higher than that of the matrix
And the strong plasticity is difficult to be greatly improved, which is attributed to the distribution of titanium carbide

Method used

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  • Preparation method of high-strength and high-plasticity titanium-graphene composite material
  • Preparation method of high-strength and high-plasticity titanium-graphene composite material
  • Preparation method of high-strength and high-plasticity titanium-graphene composite material

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Experimental program
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Effect test

Embodiment 1

[0018] Weigh 0.3g of graphene microflakes with a sheet diameter of 1μm and 100g of TC4 powder with a particle size of 200 mesh, and add them to a ball mill to make powder. The ball mill is a low-temperature liquid nitrogen planetary ball mill. The ball milling temperature is -80°C. The grinding balls in the ball mill are tungsten carbide balls, the diameters of the tungsten carbide balls are 8mm, 5mm, and 2mm respectively, the mass ratio is 5:3:2, the ball-to-material ratio is 10:1, and the speed is 400r / min . The ball mill tank was filled with argon gas protection, and the ball milling time was 120 minutes to obtain titanium-based-graphene composite powder, which was taken out for vacuum packaging; then densified and sintered to obtain a high-strength and tough titanium-graphene composite material; densified and sintered by plasma rapid The sintering technology is carried out, the sintering temperature is 1000°C, the sintering time is 5min, the heating rate is 100°C / min, and ...

Embodiment 2

[0020] Weigh 1g of graphene microflakes with a sheet diameter of 2μm and 1000g of TC4 powder with a particle size of 300 mesh, and add them to a ball mill to make powder. The ball mill is a low-temperature liquid nitrogen planetary ball mill. The ball milling temperature is -100°C. 20ml / min, the balls in the ball mill are tungsten carbide balls, the diameters of tungsten carbide balls are 8mm, 5mm, 2mm respectively, the mass ratio is 5:3:2, the ball-material ratio is 50:1, and the speed is 300r / min. The ball mill tank is filled with argon protection, and the ball milling time is 1200min to obtain titanium-based-graphene composite powder, which is taken out for vacuum packaging; then densified and sintered to obtain a high-strength and tough titanium-graphene composite material; densified and sintered and formed through plasma rapid The sintering technology is carried out, the sintering temperature is 1200°C, the sintering time is 10min, the heating rate is 150°C / min, and the pr...

Embodiment 3

[0022] Weigh 0.5g of graphene microflakes with a sheet diameter of 3μm and 300g of Ti powder with a particle size of 50 mesh, and add them to a ball mill for ball milling. The ball mill is a low-temperature liquid nitrogen planetary ball mill. The ball mill temperature is -60°C. The grinding balls in the ball mill are tungsten carbide balls, the diameters of the tungsten carbide balls are 8mm, 5mm, and 2mm respectively, the mass ratio is 5:3:2, the ball-to-material ratio is 15:1, and the speed is 600r / min . The ball mill tank is filled with argon protection, and the ball milling time is 60 minutes to obtain titanium-based-graphene composite powder, which is taken out for vacuum packaging; then densified and sintered to obtain a high-strength titanium-graphene composite material; densified and sintered by plasma rapid The sintering technology is carried out, the sintering temperature is 900°C, the sintering time is 10min, the heating rate is 50°C / min, and the pressure is 30MPa....

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Abstract

The invention belongs to the technical field of advanced metal-based composite material preparation, and particularly relates to a controllable preparation method for realizing high strength and high plasticity of a graphene in-situ reinforced titanium alloy composite material. The composite material is prepared by taking a graphene microchip as a reinforcement body and titanium metal as a matrix, a graphene powder material and titanium alloy powder are subjected to ball milling at the temperature of -100 DEG C to -60 DEG C, the distribution and form of graphene in the matrix are regulated and controlled, form variety diversification of TiC particles is achieved through in-situ synthesis, and the high-strength and high-plasticity titanium-based composite material far superior to the matrix is prepared.

Description

technical field [0001] The invention belongs to the technical field of preparation of advanced metal matrix composite materials, and in particular relates to a preparation method of a high-strength and high-plasticity titanium-graphene composite material. Background technique [0002] Titanium is an important metal that emerged in the 1950s. It has attracted widespread attention because of its light weight, high specific strength, good corrosion resistance, and excellent comprehensive performance. It has been used in aerospace, automotive, and medical equipment. Important structural materials in industrial, civil and military fields. [0003] From the perspective of energy saving and technological development, in order to adapt to the high requirements and high-performance development dilemma of titanium alloys used in aerospace, and to pursue more ideal materials, the development of titanium-based composite materials with high entropy and composite structure and function ha...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/05B22F9/04B22F1/02C01B32/225
CPCC22C14/00C22C1/05B22F9/04C01B32/225B22F2009/043B22F1/16Y02P10/25
Inventor 董龙龙周廉崔文芳张于胜
Owner NORTHEASTERN UNIV