Vacuum hot-pressing sintering preparation method for zinc-based composite material

A technology of vacuum hot pressing sintering and composite materials, which is applied in the field of preparation of medical degradable metal materials, can solve the problems of not being able to meet the production needs of medical degradable zinc-based composite materials, poor mechanical properties of zinc alloys, and coarse grains, etc., to achieve The effect of protecting structural integrity, ensuring quality, and compacting tissue

Pending Publication Date: 2021-08-06
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the mechanical properties of zinc alloys prepared by traditional smelting methods are poor, and zinc-based composites prepared by ordinary sintering methods have problems such as severe oxidation, coarse grains, and low density.
These methods cannot meet the production needs of medical degradable zinc matrix composites

Method used

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  • Vacuum hot-pressing sintering preparation method for zinc-based composite material
  • Vacuum hot-pressing sintering preparation method for zinc-based composite material
  • Vacuum hot-pressing sintering preparation method for zinc-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. A method for preparing a zinc-based composite material by vacuum hot pressing and sintering, specifically comprising the following steps:

[0026] (1) Choose zinc powder with an average diameter of 5um and a specific surface area of ​​50-200m 2 / g, graphene powder with a thickness of 1-3 layers (0.686nm-1.054nm);

[0027] (2) The specific process parameters of variable speed ball mill mixing are: 150r / min ball mill for 3h, 280r / min ball mill for 1.5h, 300r / min ball mill for 0.5h;

[0028] (3) The uniformly mixed dry powder is hot-pressed and sintered in a vacuum hot-pressed sintering furnace to obtain a graphene-reinforced zinc-based composite material block. The specific sintering parameters are: the heating rate is 10°C / min, and the sintering temperature is 380°C. The sintering pressure is 30MPa, and the sintering time is 30min. After the sintering is completed, the power is turned off and the furnace cools down.

[0029] The surface of the zinc-based co...

Embodiment 2

[0030] Example 2. A preparation method for vacuum hot pressing and sintering of zinc-based composite materials,

[0031] The difference from Example 1 is that the powder material used in this example is a three-component material of zinc, magnesium, and calcium, and the Zn-Mg-Ca alloy material is prepared by the vacuum hot-pressing sintering method described in the present invention.

[0032] The specific steps of the method are: (1) selecting the average diameter of the alloy powder to be 10um;

[0033](2) The specific process parameters of the variable speed ball milling mixture are: 150r / min for 3h, 280r / min for 1.5h, and 300r / mim for 0.5h;

[0034] (3) The uniformly mixed dry powder is hot-pressed and sintered in a vacuum hot-pressing sintering furnace to obtain a zinc-based composite material block. The specific sintering parameters are: the heating rate is 15°C / min, the sintering temperature is 390°C, and the sintering pressure is 35MPa , The sintering time is 45min. A...

Embodiment 3

[0036] Example 3. A method for preparing a zinc-based composite material by vacuum hot pressing sintering, specifically comprising the following steps:

[0037] (1) Choose zinc powder with an average diameter of 5um and a specific surface area of ​​50-200m 2 / g, graphene powder with a thickness of 1-3 layers (0.686nm-1.054nm);

[0038] (2) The specific process parameters of the variable-speed ball milling mixture are: ball milling at 140r / min for 2.8h, 275r / min for 1.4h, and 290r / mim for 0.4h;

[0039] (3) The uniformly mixed dry powder is hot-pressed and sintered in a vacuum hot-pressing sintering furnace to obtain a graphene-reinforced zinc-based composite material block. The specific sintering parameters are: heating rate of 10°C / min, 2×10 -2 Pa, the sintering temperature is 360°C, the sintering pressure is 30MPa, the sintering time is 30min, and the furnace is cooled after the sintering is completed.

[0040] The zinc-based composite material obtained in this example ha...

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Abstract

The invention discloses a vacuum hot-pressing sintering preparation method for a zinc-based composite material. According to the method, alloy powder is mixed through a variable-speed ball milling method, and then the block-shaped zinc-based composite material is prepared through a vacuum hot-pressing sintering method. The method is beneficial to reducing a gas content in the material, reducing alloy oxidation, improving the wettability of liquid-phase sintering, shrinking in the sintering process and improving the organization structure of an alloy. The preparation method has the advantages of low cost, low energy consumption, low sintering temperature and the like, and the obtained product is smooth, flat, small in oxidation, fine and uniform in crystal grain and high in density.

Description

technical field [0001] The invention relates to the technical field of preparation of medical degradable metal materials, in particular to a method for preparing a zinc-based composite material by vacuum hot pressing and sintering. Background technique [0002] Metal-based biomedical materials have been widely used in clinical practice due to their good mechanical properties and processing properties. At present, metal implant devices mainly include titanium alloy, stainless steel and cobalt-based alloy. The above-mentioned implanted devices have good corrosion resistance and can maintain the stability of structure and performance in the body for a long time. After the devices are in service, they need to be removed by secondary surgery, which will increase medical expenses and cause secondary damage to the human body. As a degradable short-term medical implant material, on the one hand, it is required that the implanted device can maintain a specific function, on the other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/14C22C1/04C22C1/10C22C18/00
CPCB22F9/04B22F3/14C22C1/0483C22C1/1084C22C18/00B22F2009/043
Inventor 赵飞代前飞张宗奎
Owner GUIZHOU UNIV
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