Preparation method of high-volume fraction alumina ceramic particle enhanced composite material
A technology of alumina ceramics and particle-reinforced aluminum, which is applied in the field of preparation of high-volume alumina ceramic particle-reinforced aluminum composite materials, can solve the problem of large volume, difficulty in preparing aluminum-based composite materials with uniform structure and high densification, and extremely Solve problems such as uniform mixing of difficult metal powders, and achieve the effect of simple operation
Inactive Publication Date: 2015-04-29
西安卓曦技术经理人科技有限公司
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Problems solved by technology
[0004] In addition, in the preparation of ceramic particle / aluminum composite materials, although the powder sintering method has the advantages of short cycle, uniform composition, and high density of the composite material, when the volume content of ceramic particles is greater than 50%, it is difficult to prepare uniform microstructure by powder metallurgy. , Aluminum matrix composites with high densification
This is mainly because the ceramic powder with a high volume fraction is very large (especially when the ceramic particles are nano-sized), and it is extremely difficult to achieve uniform mixing between it and the metal powder, which makes the mixed powder unable to be sintered effectively
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preparation example Construction
[0017] The preparation method of high volume fraction alumina ceramic particle reinforced aluminum composite material, the steps are as follows:
[0018] Step 1: First configure the mixed powder composed of pure aluminum powder with an average particle size of 50 microns and alumina ceramic powder with an average particle size of 50 nm according to the preset volume content ratio, wherein the volume occupied by the alumina ceramic powder The content percentage is 20%, that is, the corresponding mass content percentage is 25%. Put 150g of mixed powder into the ball mill tank of a high-energy ball mill, and combine 600g of balls at a speed of 140 rpm to mill the mixed powder. That is, the mixing operation, the mixing time range is 20 hours;
[0019] Step 2: extract 100g of the mixed powder after the mixing operation from the mixed powder after the mixing operation and put it into a high-purity Ar atmosphere circulation purification glove box, and keep the high-purity Ar atmosphe...
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Abstract
The invention provides a preparation method of a high-volume fraction alumina ceramic particle enhanced composite material. The preparation method is characterized by improving a preparation technology of mixed powder of high-volume content alumina and aluminum, effectively realizing the uniform mixing of the high-volume content alumina and the aluminum and simultaneously preparing the composite material of the nanometer alumina and the aluminum with high densification and high strength by means of a discharge-produced plasma rapid sintering technology. The preparation method is simple in operation, energy-saving and environment-friendly.
Description
technical field [0001] The invention relates to the technical field of preparation of high volume fraction alumina ceramic particles reinforced aluminum composite material, in particular to a method for preparing high volume fraction nano alumina ceramic particle reinforced aluminum composite material by spark plasma sintering. Background technique [0002] Ceramic particle reinforced aluminum matrix composites have excellent physical properties such as high specific strength, high specific modulus, wear resistance and low thermal expansion coefficient, and are widely used in aerospace, military fields, automobiles, electronic instruments and other industries. Stir casting, powder metallurgy, and liquid metal infiltration are common methods for preparing ceramic particle-reinforced aluminum matrix composites. [0003] However, limited by the dispersion of ceramic particles, the preparation of high volume fraction (>50vol.%) ceramic particle reinforced aluminum matrix comp...
Claims
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IPC IPC(8): C22C1/05C22C1/10C22C21/00
Inventor 杨坤宋强范晓孟
Owner 西安卓曦技术经理人科技有限公司