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Preparation method of low volume fraction aluminum borate whiskers reinforced aluminum matrix composites

A technology of aluminum borate whiskers and volume fraction is applied in the field of preparation of whisker-reinforced aluminum matrix composite materials, which can solve the problems of low plasticity and the like, and achieve the effect of improving plasticity and elongation.

Inactive Publication Date: 2011-12-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problem of low plasticity of the existing aluminum borate whisker reinforced aluminum matrix composite material, and provides a preparation method of aluminum borate whisker reinforced aluminum matrix composite material with a low volume fraction

Method used

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  • Preparation method of low volume fraction aluminum borate whiskers reinforced aluminum matrix composites
  • Preparation method of low volume fraction aluminum borate whiskers reinforced aluminum matrix composites
  • Preparation method of low volume fraction aluminum borate whiskers reinforced aluminum matrix composites

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specific Embodiment approach 1

[0011] Specific embodiment one: the preparation method of the aluminum borate whisker reinforced aluminum matrix composite material of low volume fraction in the present embodiment is to carry out according to the following steps: one, zinc nitrate and citric acid are added in distilled water, the content of zinc nitrate and citric acid The molar ratio is 1:1, the quality of distilled water is 50 to 200 times of the total mass of chromium nitrate and citric acid, and then magnetically stirred and heated to reflux at 80 to 100 ° C for 1 to 2 hours to obtain a transparent ZnO sol; 2. Aluminum borate whiskers are added to the ZnO sol obtained in step 1. The quality of the aluminum borate whiskers is 5 to 20 times that of ZnO in the ZnO sol, and then ultrasonically dispersed and then dried; 3. The aluminum borate crystals treated in step 2 It must be baked in an environment of 400-600 °C for 1-2 hours, and then put into water for ultrasonic dispersion for 1-2 hours; 4. Add the alum...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that the quality of distilled water in step 1 is 60 to 150 times the total mass of chromium nitrate and citric acid. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment differs from Embodiment 1 in that the quality of distilled water in step 1 is 100 times the total mass of chromium nitrate and citric acid. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a preparation method of a low-volume-fraction and high moulding aluminum borate crystal whisker reinforced aluminum-based composite material and relates to a preparation method of a crystal whisker reinforced aluminum-based composite material. The invention aims to solve the technical problem of low intensity and low plasticity in the conventional aluminum borate crystal whisker reinforced aluminum-based composite material. The preparation method comprises the following steps of: 1, adding zinc nitrate and citric acid into distilled water, magnetically stirring, heating and flowing back to obtain zinc oxide (ZnO) sol; 2, adding aluminum borate crystal whisker into the ZnO sol, ultrasonically dispersing and drying; 3, roasting to obtain ZnO coated crystal whisker and ultrasonically dispersing in water; 4, adding soybean pulp, stirring uniformly, adding a coagulating agent, performing compression molding to prepare a preformed part, drying at room temperature, heating at a certain speed, roasting at high temperature, and cooling along with a furnace to manufacture the preformed part; 5, placing the preformed part into a die, preheating, pouring molten aluminum alloy, extruding and maintaining the pressure to manufacture the low-volume-fraction and high moulding aluminum borate crystal whisker reinforced aluminum-based composite material. The elongation percentage of the material is obviously increased by 1.9 to 2.7 times.

Description

technical field [0001] The invention relates to a preparation method of a whisker-reinforced aluminum-based composite material. Background technique [0002] Whisker-reinforced aluminum-matrix composites are the best among discontinuously reinforced aluminum-matrix composites. They have a series of advantages such as low cost, isotropy, excellent mechanical properties and easy processing and deformation, so they have a very wide application prospect. Initially, most researchers focused on SiC and Si 3 N 4 Whisker-reinforced aluminum matrix composites. However, the high price largely limits the wide application of aluminum matrix composites. Aluminum borate whiskers were put into the market in Japan in 1989, and are favored by researchers because of their excellent performance-price ratio. Moreover, in China, aluminum borate whiskers can be synthesized using salt lake resources and seawater desalination by-products, and the cost is very low, and mass production has begun....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/04C22C47/08C22C49/06C22C49/14C22C101/06C22C121/02
Inventor 岳红彦黄硕郭二军王丽萍俞泽民
Owner HARBIN UNIV OF SCI & TECH