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Pressure casting method for crystal whisker and nanometer granule commingle strengthening aluminium base compound material

A nanoparticle-reinforced aluminum-based technology, applied in the field of hybrid reinforced metal matrix composites prepared by die-casting method

Inactive Publication Date: 2006-03-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are few studies on the preparation of discontinuous hybrid reinforced metal matrix composites by die casting process, and the preparation of submicron whisker and nanoparticle hybrid reinforced aluminum matrix composites by die casting process has not been reported.

Method used

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  • Pressure casting method for crystal whisker and nanometer granule commingle strengthening aluminium base compound material

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Experimental program
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Effect test

specific Embodiment approach 1

[0010] Specific embodiment 1: This embodiment is realized in the following way: 1. Prepare the prefabricated block of the hybrid reinforcement: a. Wash the whiskers with distilled water and mix them with distilled water for later use; b. After mixing the nanoparticles with an organic solvent, add The weight concentration is 1-2% dispersant, and the mixed solution is ultrasonically dispersed for 2-4 cycles, each cycle is 10-15 minutes; c, the mixed solution of particles and whiskers is mixed, and mechanically stirred Ultrasonic dispersion is carried out for 2 to 4 cycles under certain conditions, and each cycle is 10 to 15 minutes; d. Then pour the mixed liquid into the prefabricated block preparation mold to filter the water, and when the liquid is not visible on the upper part, press Put the head into the mold; e. After the prefabricated block is formed under pressure on both sides, keep the pressure for 10 to 20 minutes, then withdraw the prefabricated block from the mold, an...

specific Embodiment approach 2

[0011] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that it also includes h step: h, put the as-cast material in the extrusion mold and heat it, and keep it warm for 30 hours at a temperature of 400-500°C After ~60 minutes, carry out forward extrusion to the as-cast material, and the extrusion ratio is (10~36):1. Other processes and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012]Specific implementation mode three: In this implementation mode, the preparation of (SiCw+SiCp) / 2024Al with a diameter of 56mm and a height of 50mm is taken as an example, and the required weight of SiC whiskers and nano-SiC particles is weighed according to the volume percentage of the reinforcement. The whiskers were washed with distilled water and mixed with distilled water for later use; after the nanoparticles were mixed with absolute ethanol, 1% sodium dodecylbenzenesulfonate was added, and ultrasonic dispersion was carried out for 2 cycles, each cycle 10 ~15 minutes; then mix the mixed solution of particles and whiskers, add 2 cycles of ultrasonic dispersion on the basis of mechanical stirring, and then pour the mixed solution into the prefabricated block preparation mold to filter water, when the upper part cannot be seen When it is liquid, put the indenter into the mold; after the prefabricated block is pressed and formed on both sides, hold the pressure for 10 m...

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Abstract

The present invention relates to the pressure casting process of preparing submicron whisker and nanometer particle reinforced aluminum base composite material. The pressure casting process of preparing submicron whisker and nanometer particle reinforced aluminum base composite material includes: mixing whisker and distilled water; mixing nanometer particle, organic solvent and dispersant and ultrasonic dispersing; stirring mechanically and dispersing ultrasonically the mixed liquid of the particle and the whisker; pouring the mixed liquid into prefabricating mold to filter out water and double-sided pressing form; withdrawing and stoving the prefabricated block; setting the prefabricated block and special graphite mold into press casting mold and heating while heating to melt aluminum or aluminum alloy; and pouring liquid aluminum or aluminum alloy into lower mold to realize pressure casting. The whisker and the particle are controlled in 15-20 vol% and 2-7 vol% separately.

Description

Technical field: [0001] The invention relates to a process for preparing a hybrid reinforced metal matrix composite material by a pressure casting method, in particular to a pressure casting preparation process applied to a submicron whisker and nano particle hybrid reinforced aluminum matrix composite material. Background technique: [0002] Aluminum matrix composites are the most noticed class of materials in metal matrix composites. In the early days, people mainly focused on continuous long fiber reinforced aluminum matrix composites. Continuous long fiber reinforced metal matrix composites showed satisfactory performance. Due to cost reasons, it has not been widely used. In recent years, discontinuously reinforced aluminum matrix composites have received great attention. The price of the reinforcement is much lower than that of the longer fiber, and the existing metal material processing methods and equipment can be used in the preparation, so the cost of the material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16C22C49/06
Inventor 耿林张雪囡王桂松郑镇洙李爱滨
Owner HARBIN INST OF TECH