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Preparation method of aluminum alloy composite material reinforced by filler particles

A composite material and aluminum alloy technology, which is applied in the field of preparation of aluminum alloy composite materials, can solve the problems of easy thermal cracking, poor wear resistance, poor thermal conductivity, etc., and achieves the effects of low cost, easy preparation, and reduced thermal expansion coefficient.

Active Publication Date: 2015-12-09
江阴戴勒姆动力设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing an aluminum alloy composite material reinforced by filling particles. As a material for brake discs, it can solve the defects of existing cast iron brake discs such as poor thermal conductivity, poor wear resistance, and easy thermal cracking.

Method used

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Embodiment 1

[0020]A method for preparing an aluminum alloy composite material reinforced by filling particles. The matrix alloy is cast aluminum alloy ZAlSi8MgBe, and the filling ions include tetraacicular zinc oxide whiskers, aramid fiber, glass fiber, nano-titanium dioxide and silicon carbide, wherein the tetraacicular The mass of zinc oxide whisker, aramid fiber, glass fiber, nano-titanium dioxide and silicon carbide accounted for 6%, 4%, 3%, 1% and 2% of the mass of the cast aluminum alloy ZAlSi8MgBe respectively; the length of four-needle zinc oxide whisker 12μm, root diameter 2μm, aramid fiber length 3mm, monofilament diameter 8μm, glass fiber 140 mesh glass fiber powder, nano-titanium dioxide particle size 20nm; four needle-shaped zinc oxide whiskers need to be modified according to the following method: Dissolve 0.5g of silane coupling agent in 60ml of acetone, then add dropwise oxalic acid to adjust the pH to 5, and let it stand for 20 minutes; then weigh 12g of four-needle zinc o...

Embodiment 2

[0025] A method for preparing an aluminum alloy composite material reinforced by filling particles, characterized in that, the matrix alloy is selected from cast aluminum alloy ZAlSi8MgBe, and the filling ions include four-acicular zinc oxide whiskers, aramid fiber, glass fiber, nano-titanium dioxide and silicon carbide, Among them, the quality of four-acicular zinc oxide whiskers, aramid fiber, glass fiber, nano-titanium dioxide and silicon carbide accounted for 8%, 5%, 4%, 2% and 3% of the mass of cast aluminum alloy ZAlSi8MgBe; The length of zinc whisker is 14 μm, the root diameter is 3 μm, the length of aramid fiber is 4 mm, the diameter of monofilament is 10 μm, the glass fiber is 150 mesh glass fiber powder, and the particle size of nano-titanium dioxide is 25 nm; the four-needle zinc oxide whisker needs to be processed according to the following method Modification: Weigh 0.8g of silane coupling agent and dissolve it in 70ml of acetone, then add dropwise oxalic acid to a...

Embodiment 3

[0030] A method for preparing an aluminum alloy composite material reinforced by filling particles. The matrix alloy is cast aluminum alloy ZAlSi8MgBe, and the filling ions include tetraacicular zinc oxide whiskers, aramid fiber, glass fiber, nano-titanium dioxide and silicon carbide, wherein the tetraacicular The mass of zinc oxide whiskers, aramid fibers, glass fibers, nano-titanium dioxide and silicon carbide accounted for 7%, 5%, 3%, 1% and 3% of the mass of the cast aluminum alloy ZAlSi8MgBe respectively; the length of the four-needle zinc oxide whiskers 13μm, root diameter 2μm, aramid fiber length 3mm, monofilament diameter 9μm, glass fiber 145 mesh glass fiber powder, nano-titanium dioxide particle size 22nm; four needle-shaped zinc oxide whiskers need to be modified according to the following method: Dissolve 0.6g of silane coupling agent in 65ml of acetone, then add dropwise oxalic acid to adjust the pH to 5.5, and let it stand for 25 minutes; then weigh 13g of four-ne...

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Abstract

The invention relates to the field of new materials and in particular relates to a preparation method of a filler particle enhanced aluminium alloy composite material. A cast aluminium alloy ZAlSi8MgBe is selected as a matrix alloy; filler particles include tetrapod-like zinc oxide whiskers, aramid fibers, glass fibers, nano titanium dioxide and silicon carbide, wherein the weights of tetrapod-like zinc oxide whiskers, aramid fibers, glass fiber, nano titanium dioxide and silicon carbide account for 6-8%, 4-5%, 3-4%, 1-2% and 2-3% of the mass of the cast aluminium alloy ZAlSi8MgBe, respectively; and all the filler particles are modified or pre-processed, and then stirred and cast with the matrix aluminium alloy, so that the filler particle enhanced aluminium alloy composite material is obtained. The aluminium alloy composite material prepared by using the preparation method disclosed by the invention is low in weight, high in specific strength and specific rigidity, low in coefficient of thermal expansion, and excellent in thermal conductivity and abrasive resistance, and further easy to prepare and low in cost; and the enhancement phase is dispersively distributed in the matrix and has isotropy; and therefore, the composite material is suitable for various complex stress states.

Description

technical field [0001] The invention relates to the field of new composite materials, in particular to a method for preparing an aluminum alloy composite material reinforced by filling particles. Background technique [0002] At present, the field of composite materials has been rapidly developed, and high-strength and high-modulus fibers such as carbon fibers, graphite fibers, and boron fibers have been developed successively. In the 1970s, aramid fibers and silicon carbide fibers appeared. These high-strength, high-modulus fibers can be combined with non-metallic matrices such as synthetic resins, carbon, graphite, ceramics, and rubber, or metal matrices such as aluminum, magnesium, and titanium to form composite materials with their own characteristics. The brake disc is an important part of the automobile braking system, and its braking performance is directly related to the driving safety of the vehicle. The surface temperature of cast iron brake discs widely used at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/02C22C47/08C22C49/06C22C101/00
Inventor 孟红琳
Owner 江阴戴勒姆动力设备有限公司
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