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Method for synthesizing Al4O4C nanometer particle reinforced aluminum matrix composite material in situ

An in-situ synthesis and nanoparticle technology, applied in the field of composite materials, can solve the problems of poor combination of matrix and reinforcement phase particles, easy contamination of the interface, and limited mechanical properties, and achieve low cost, uniform and compact structure, and good mechanical properties. Effect

Inactive Publication Date: 2018-12-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the external addition method is widely used in the industry to introduce ceramic particles, and the external addition method has the disadvantages of easy contamination of the interface, high interfacial energy, poor combination of the matrix and the reinforcement phase particles, etc., which limits the improvement of its mechanical properties and makes its application subject to many limitations

Method used

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  • Method for synthesizing Al4O4C nanometer particle reinforced aluminum matrix composite material in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Clean and preheat the steel components used in the experiment. Derust, grind and clean the steel molds used in the casting process, the colander for removing impurities, the steel nozzles for degassing operation, and the molds, etc., and put them in a 120°C resistance furnace for heating and drying for 1 hour, take them out and cool them Install the argon degassing nozzle; clean the graphite crucible, remove the impurities falling off the surface and dry it to remove water.

[0032] (2) Prepare raw materials: mix pure aluminum ingots and pure silicon ingots according to the mass percentage of 99:1, and the introduction amount of phenolic resin is 0.1wt% of the total mass of pure aluminum ingots and pure silicon ingots.

[0033] (3) Melting: Put pure aluminum ingots and pure silicon ingots into graphite crucibles in medium-frequency induction metal melting furnaces and heat them to 850°C to 900°C to completely melt, then remove impurities on the surface of molten alu...

Embodiment 2

[0038] (1) Clean and preheat the steel components used in the experiment. Derust, grind and clean the steel molds used in the casting process, the colander for removing impurities, the steel nozzles for degassing operation, and the molds, etc., and put them in a 120°C resistance furnace for heating and drying for 1 hour, take them out and cool them Install the argon degassing nozzle; clean the graphite crucible, remove the impurities falling off the surface and dry it to remove water.

[0039] (2) Prepare raw materials: mix pure aluminum ingots and pure silicon ingots according to the mass percentage of 83:17, and the introduction amount of phenolic resin is 3wt% of the total mass of pure aluminum ingots and pure silicon ingots.

[0040] (3) Melting: Put pure aluminum ingots and pure silicon ingots into graphite crucibles in medium-frequency induction metal melting furnaces and heat them to 850°C to 900°C to completely melt, then remove impurities on the surface of molten alum...

Embodiment 3

[0045] (1) Clean and preheat the steel components used in the experiment. Derust, grind and clean the steel molds used in the casting process, the colander for removing impurities, the steel nozzles for degassing operation, and the molds, etc., and put them in a 120°C resistance furnace for heating and drying for 1 hour, take them out and cool them Install the argon degassing nozzle; clean the graphite crucible, remove the impurities falling off the surface and dry it to remove water.

[0046](2) Prepare raw materials: mix pure aluminum ingots and pure silicon ingots according to the mass percentage of 75:25, and the introduction amount of phenolic resin is 6wt% of the total mass of pure aluminum ingots and pure silicon ingots.

[0047] (3) Melting: Put pure aluminum ingots and pure silicon ingots into graphite crucibles in medium-frequency induction metal melting furnaces and heat them to 850°C to 900°C to completely melt, then remove impurities on the surface of molten alumi...

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Abstract

Disclosed is a method for synthesizing Al4O4C nanometer particle reinforced aluminum matrix composite material in situ, comprising the following steps: cleaning a graphite crucible, removing surface exfoliated impurities and drying and removing water; preparing raw materials: mixing a pure aluminum ingot and a pure silicon ingot according to a mass percentage, introducing phenolic resin, placing the pure aluminum ingot and the pure silicon ingot in the graphite crucible in a medium frequency induction metal melting furnace to be heated and melted, removing the surface impurities of the aluminum liquid, adding a covering agent, and performing the heat preservation; after the heat preservation is finished, using a bell jar to press the phenolic resin into the mixed solution of the aluminum liquid and the silicon liquid, performing the heat preservation and stirring, adding a slagging agent, deeply placing an argon gas nozzle is into an aluminum alloy melt, then gradually elevating the nozzle until the nozzle completely leaves the melt, turning off an argon gas valve, removing the surface dross of the melt by using a steel colander, performing the heat preservation, and performing casting after the temperature is reduced to 750 DEG C to obtain a casting. The invention has the advantages of simple synthesis process, easy control over the synthesis process, good mechanical properties, uniform and compact structure, and lower cost.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to in-situ synthesis of Al 4 o 4 C Nanoparticles Reinforced Methods for Aluminum Matrix Composites. Background technique [0002] With its excellent comprehensive performance and characteristics, particle-reinforced aluminum matrix composites not only meet the high-performance requirements of high-end fields such as aerospace, energy, high-precision machine tools, cutting-edge weapons and automobiles, but also the isotropy of the material makes the material Can be processed using conventional metalworking techniques. All these advantages make the particle-reinforced aluminum matrix composites have very broad application prospects in civil facilities and high-tech fields. [0003] In the Al–O–C system, aluminum oxycarbon (Al 4 o 4 C) It is still stable until 1890 °C, and it is a ternary carbide that has attracted much attention. The crystal structure determination r...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/02C22C21/00C22C32/00
CPCC22C1/1036C22C21/00C22C32/0052C22C1/1052
Inventor 朱建锋卢博王芬秦毅方媛张佩赵婷方园武文玲郭江薛雨汪加欢赵旭贺鹏
Owner SHAANXI UNIV OF SCI & TECH
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