High-strength titanium alloy-graphene composite material and preparation method thereof

A composite material and graphene technology, which is applied in the field of aerospace material preparation, can solve problems such as the uniform mixing of titanium alloy and graphene, the difficulty of graphene's due effect, and the large specific surface area of ​​graphene, etc., to achieve microscopic The effect of uniform structure, high cost performance and high utilization rate of raw materials

Active Publication Date: 2019-11-29
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in density between titanium alloy and graphene, it is difficult to achieve uniform mixing of titanium alloy and graphene; in addition, due to the large specific surface area of ​​graphene, it is easy to agglomerate, which reduces the performance of composite materials, and it is difficult to maximize the application of graphene. has an effect

Method used

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  • High-strength titanium alloy-graphene composite material and preparation method thereof
  • High-strength titanium alloy-graphene composite material and preparation method thereof
  • High-strength titanium alloy-graphene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) 1998g of pure titanium alloy TC4 powder with a particle size of 150 μm and 2 g of graphene are added into a V-type powder mixer with a rotating speed of 20 r / min and mixed for 24 hours;

[0043] (2) Put the mixed powder obtained from step (1) into a VC high-efficiency mixer, mix for 20min, and rotate at a speed of 100r / min;

[0044] (3) The mixed powder obtained from step (2), balls and 0.1wt% stearic acid are simultaneously placed in a ball mill, filled with liquid nitrogen, and subjected to low-temperature ball milling; wherein, the ball milling speed is 20r / min, and the ball material The ratio (referring to the ratio of the mass of the mixed powder to the mass of the ball) is 25:1, the low temperature ball milling is 2 hours, and the ball milling temperature is controlled at 80K;

[0045] (4) Take out the powder after ball milling and put it into the bag. The material of the bag is No. 20 steel material, the thickness is 2mm, the diameter of the inner cavity is Φ...

Embodiment 2-4

[0050] The titanium alloy-graphene composite material was prepared by the preparation method provided in this application, and the specific preparation process parameters and corresponding properties are shown in Table 1. Except table 1, other processing parameters are identical with embodiment 1.

[0051] figure 2 Graphene-coated titanium alloy powder scanning electron micrograph (low magnification) prepared for embodiment 2; image 3 Graphene-coated titanium alloy powder scanning electron micrograph (high power) prepared for embodiment 3; From figure 2 and image 3 It can be seen from the figure that the complete and good coating of titanium alloy powder by graphene can be realized by the preparation method of the present invention. Figure 4 For the high-strength titanium alloy-graphene composite material XRD spectrum that embodiment 2 prepares, show that the high-strength titanium alloy-graphene composite material prepared by the inventive method has no impurity phase...

Embodiment 6-10

[0055] Embodiment 6-10 is compared with embodiment 3 only the ball milling parameter of step (3) is different, and other steps are all identical with embodiment 1. See Table 2 for the low temperature ball milling parameters and product performance parameters of step (3) of this comparative example.

[0056] Table 2 embodiment 6-10 preparation process parameter and corresponding performance

[0057] serial number ball to material ratio Ball milling speedr / min Milling time h Tensile strength MPa Yield strength MPa Example 6 15:1 30 4 985 921 Example 7 20:1 40 5 1010 992 Example 8 60:1 30 4 974 916 Example 9 40:1 48 2 946 884 Example 10 40:1 15 6 968 903

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Abstract

The invention provides a preparation method of a high-strength titanium alloy-graphene composite material. The preparation method comprises the following steps: (1) a proper amount of mixed powder consisting of titanium alloy powder and graphene, grinding balls and dispersing agents are put in a ball mill for low-temperature ball milling; and (2) the materials obtained in the step (1) are loaded in a cover for degassing insulation and hot isostatic pressing to finally obtain the high-strength titanium alloy-graphene composite material. Graphene-coated titanium alloy powder obtained through low-temperature ball milling can realize total compactness under special environment of high-temperature and high-pressure hot isostatic pressing; the prepared high-strength titanium alloy-graphene composite material is uniform in microscopic structure, fine in grain, free of texture and isotropic; meanwhile, the mechanical performances are excellent: the stretching strength can reach 1016 MPa, and the yield strength can reach 998 MPa; and the mechanical performances are far higher than the national standard (HB5432-1989) of titanium alloy forgings for aircrafts.

Description

technical field [0001] The invention relates to a high-strength titanium alloy-graphene composite material and a preparation method thereof, belonging to the technical field of aerospace material preparation. Background technique [0002] Due to the advantages of high specific strength, excellent corrosion resistance, good high temperature resistance and ideal assembly compatibility with non-metallic composite materials, titanium and its alloy materials have become the most popular materials in aerospace and shipbuilding. Metal structural materials widely used in fields such as nuclear energy, weapons, energy, and chemical industry have also become irreplaceable strategic metal materials. [0003] However, in recent years, in order to greatly reduce the structural weight of aerospace vehicles, reduce the mass of the whole bomb, increase the amount of warhead charge (increase the loading coefficient), strengthen the damage capability and meet the high temperature effect broug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00C01B32/186
CPCC01B32/186C22C1/05C22C14/00
Inventor 曾宏刘文彬陈伟况春江王铁军
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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