Hot pressing sintering particle reinforcing zinc-based composite material and preparation method thereof

A particle-enhancing and hot-pressing sintering technology is applied in the field of composite material preparation, which can solve the problems of inability to prepare Zn-based composite materials and complicated preparation process, and achieve the effects of shortening sintering time, lowering sintering temperature and good mechanical properties.

Active Publication Date: 2015-09-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is complicated, and the Zn-based composite material with a high volume fraction reinforcement (the reinforcement accounts for 1-6wt% of the mass of the matrix) cannot be prepared.

Method used

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  • Hot pressing sintering particle reinforcing zinc-based composite material and preparation method thereof
  • Hot pressing sintering particle reinforcing zinc-based composite material and preparation method thereof
  • Hot pressing sintering particle reinforcing zinc-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In this example

[0053] The purity of Zn powder is greater than or equal to 99.9%, and its particle size is 1 μm;

[0054] The purity of Al powder is greater than or equal to 99.9%, and its particle size is 10 μm;

[0055] The purity of Cu powder is greater than or equal to 99.9%, and its particle size is 0.5 μm;

[0056] TiB 2 The purity of the powder is greater than or equal to 99.9%, and its particle size is 1.5 μm.

[0057] Zn powder, Al powder, Cu powder and TiB 2 The powder is prepared as a mixed powder according to the mass ratio of 71.0:27.0:2.0:13.6. The mixed powder is mixed in a planetary ball mill with a ball-to-material ratio of 10:1 and a mixing time of 180 minutes (speed: 500 rpm). After ball milling and vacuum drying, put it into a graphite mold, separate the mixed powder from the upper and lower indenters and the inner cavity of the graphite mold with graphite paper, and pre-press on a press with a pressure of 500MPa and a processing time of 200mi...

Embodiment 2

[0059] In this example

[0060] The purity of Zn powder is greater than or equal to 99.9%, and its particle size is 1 μm;

[0061] The purity of Al powder is greater than or equal to 99.9%, and its particle size is 10 μm;

[0062] The purity of Cu powder is greater than or equal to 99.9%, and its particle size is 0.5 μm;

[0063] TiB 2 The purity of the powder is greater than or equal to 99.9%, and its particle size is 1.5 μm.

[0064] Zn powder, Al powder, Cu powder and TiB 2 The powder is prepared as a mixed powder according to the mass ratio of 76.2:22.0:1.8:11.2. The mixed powder is mixed in a planetary ball mill, the ball-to-material ratio is 9:1, and the mixing time is 300 minutes (rotational speed 400 rpm). The mixed powder after ball milling is put into the graphite mold, and the mixed powder is separated from the upper and lower indenters and the inner cavity of the graphite mold by graphite paper, and pre-pressed on the press with a pressure of 400MPa and a proc...

Embodiment 3

[0066] In this example

[0067] The purity of Zn powder is greater than or equal to 99.9%, and its particle size is 1 μm;

[0068] The purity of Al powder is greater than or equal to 99.9%, and its particle size is 10 μm;

[0069] The purity of Cu powder is greater than or equal to 99.9%, and its particle size is 0.5 μm;

[0070] TiB 2 The purity of the powder is greater than or equal to 99.9%, and its particle size is 1.5 μm.

[0071] Zn powder, Al powder, Cu powder and TiB 2 The powder is prepared as mixed powder according to the mass ratio of 62.8:35.0:2.2:8.7. The mixed powder is mixed in a planetary ball mill, the ball-to-material ratio is 8:1, and the mixing time is 600min (rotating speed 600 rpm). The mixed powder after ball milling is put into the graphite mold, and the mixed powder is separated from the upper and lower indenters and the inner cavity of the graphite mold by graphite paper, and pre-pressed on the press with a pressure of 300MPa and a processing tim...

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Abstract

The invention relates to a hot pressing sintering particle reinforcing zinc-based composite material and a preparation method thereof, and belongs to the technical field of composite material preparation. The method includes the steps of preparing Zn powder, Al power, Cu power and TiB2 power as raw materials according to the mass ratio of 50-90 to 15-40 to 1-3 to 1-20, conducting high energy ball-milling and prepressing, and then obtaining the hot pressing sintering particle reinforcing zinc-based composite material through a segmented sintering method. The prepared components are reasonable in design, the preparation process is simple, and the zinc-based composite material which is high in interface combination strength and low in porosity and defect rate is obtained through the coordinative effects of all the components and all parameters.

Description

technical field [0001] The invention relates to a hot-pressed sintered particle-reinforced zinc-based composite material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] Zinc alloy has superior mechanical properties, good low temperature casting performance and processing performance, and has been more and more widely used in many fields such as machinery, electronics and chemical industry. In order to solve the defects of zinc alloys such as low melting point, poor heat resistance, and lower tensile strength above 100°C, in recent years, the material circles at home and abroad have begun to study zinc-based composite materials with short fibers, whiskers, and particles as reinforcing phases. . Studies have found that compared to the matrix alloy, zinc-based composite materials have many advantages: wear resistance, high temperature resistance, elasticity, fatigue life and hardness also incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C18/00C22C18/04C22C32/00
Inventor 李红英康巍李振国
Owner CENT SOUTH UNIV
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