Pressureless sintering-pressurized densifying preparation method for titanium-aluminum-carbon particle enhanced zinc-aluminum matrix composite

A composite material and particle reinforcement technology, which is applied in the preparation of titanium-aluminum-carbon particle-reinforced zinc-aluminum matrix composite materials, and in the field of preparation of titanium-aluminum-carbon particle-reinforced zinc-aluminum matrix composite materials, can solve the problems affecting the popularization and application of zinc-aluminum matrix composite materials, powder Uneven distribution, poor wettability and other problems, to achieve the effect of less defects, uniform material structure and high density

Active Publication Date: 2014-10-15
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are generally some insurmountable problems in various zinc-aluminum matrix composites that have been prepared, such as poor wettability between ceramic powder and zinc-aluminum alloy melt, uneven powder distribution, and defects such as agglomeration, which significantly affect the zinc-aluminum matrix. Promotion and Application of Composite Materials

Method used

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  • Pressureless sintering-pressurized densifying preparation method for titanium-aluminum-carbon particle enhanced zinc-aluminum matrix composite
  • Pressureless sintering-pressurized densifying preparation method for titanium-aluminum-carbon particle enhanced zinc-aluminum matrix composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Titanium-aluminum carbon powder: the purity of the titanium-aluminum carbon powder used in this embodiment is 97%, and the average particle size is 4.21 μm.

[0023] Zinc-aluminum alloy powder: The zinc-aluminum alloy used in this example is commercially available ZA27 alloy powder, the particle size of the powder is 300 mesh, and its mass percentage composition is as follows: Zn 72.31%, Al 27.47%, Fe 0.09%, Si 0.10%, other 0.03 %.

[0024] Mix ZA27 alloy powder and titanium-aluminum carbon powder according to the volume ratio of 7:3, weigh 29.34g of ZA27 powder and 10.66g of titanium-aluminum carbon powder, and put them into a planetary ball mill with a ball-to-material ratio of 10:1 and a speed of 300r / min, ball milled and mixed for 3 hours, passed through an 80-mesh sieve after cooling; put the mixed powder into a graphite mold, pre-pressed under a pressure of 20MPa, and then put the formed green body together with the mold into a hot-press sintering furnace, Under...

Embodiment 2

[0027] Titanium-aluminum carbon powder: the purity of the titanium-aluminum carbon powder used in this embodiment is 95%, and the average particle size is 7.39 μm.

[0028] Zinc-aluminum alloy powder: The zinc-aluminum alloy used in this example is commercially available ZA27 alloy powder, the particle size of the powder is 300 mesh, and its mass percentage composition is as follows: Zn 72.31%, Al 27.47%, Fe 0.09%, Si 0.10%, other 0.03 %.

[0029] Mix ZA27 alloy powder and titanium-aluminum carbon powder according to the volume ratio of 8:2, weigh 33.0g of ZA27 powder and 7.0g of titanium-aluminum carbon powder, put them into a planetary ball mill, the ratio of ball to material is 15:1, and the speed is 400r / min, ball milled and mixed for 2 hours, passed through a 80-mesh sieve after cooling; put the mixed powder into a graphite mold, and pre-pressed it under a pressure of 10MPa. Under the protection of argon, carry out pressureless sintering first, raise the temperature to ...

Embodiment 3

[0032] Titanium-aluminum carbon powder: the purity of the titanium-aluminum carbon powder used in this embodiment is 92%, and the average particle size is 12.52 μm.

[0033] Zinc-aluminum alloy powder: The zinc-aluminum alloy used in this example is commercially available ZA27 alloy powder, the particle size of the powder is 300 mesh, and its mass percentage composition is as follows: Zn 72.31%, Al 27.47%, Fe 0.09%, Si 0.10%, other 0.03 %.

[0034] Mix ZA27 alloy powder and titanium-aluminum carbon powder according to the volume ratio of 7:3, weigh 29.34g of ZA27 powder and 10.66g of titanium-aluminum carbon powder, put them into a planetary ball mill, the ratio of ball to material is 10:1, and the speed is 250r / min, ball milled and mixed for 6 hours, passed through an 80-mesh sieve after cooling; put the mixed powder into a graphite mould, pre-compressed under a pressure of 15MPa, and then put the molded green body into a hot-press sintering furnace together with the mould. U...

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Abstract

The invention discloses a pressureless sintering-pressurized densifying preparation method for a titanium-aluminum-carbon (Ti3AlC2) particle enhanced zinc-aluminum matrix composite. The method comprises two steps of sintering and densifying. The method comprises the following steps: sintering mixed powders of titanium aluminum carbon and zinc-aluminum alloy at a relatively high temperature; conducting pressurized densifying at a relatively low temperature. Sintering at the relatively high temperature can obviously improve the interface bonding force between the titanium aluminum carbon enhanced phase and the zinc-aluminum alloy matrix, and pressurized densifying at the relatively low temperature can prevent zinc-aluminum alloy liquids from being extruded out because of pressurization; the titanium-aluminum-carbon particle enhanced zinc-aluminum matrix composite is uniform and compact in organization, less in defects and close in combination between the matrix and the enhanced phase, and has good physical properties and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of metal-based composite materials, in particular to a preparation method of titanium-aluminum-carbon particle-reinforced zinc-aluminum-based composite materials. More specifically, the present invention relates to a method for preparing titanium-aluminum-carbon particle-reinforced zinc-aluminum matrix composite material by "sintering-densification two-step method". Background technique [0002] Zinc-aluminum alloys (ZA8, ZA12, ZA22, ZA27 and other alloy series) have good mechanical properties and wear resistance, low cost, and are easy to manufacture. They are widely used as a wear-resistant sealing material, but zinc-aluminum alloys have low working Shortcomings such as poor creep properties also limit its application range to a large extent. In order to solve these problems and further expand its application fields, it is becoming a research and development hotspot to use ceramic particles, whiskers and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C32/00
Inventor 周洋李海燕陈晨李世波李翠伟黄振莺翟洪祥
Owner BEIJING JIAOTONG UNIV
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