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Silicon carbide reinforced aluminum-based composite material and its preparation method

An aluminum-based composite material and composite material technology, applied in the field of aluminum-based composite materials and its preparation, can solve problems such as low efficiency, high equipment requirements, and cumbersome processes, and achieve the effects of simple process, small contact area, and low equipment investment

Inactive Publication Date: 2012-08-01
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the densification of composite materials, most researches use hot pressing sintering to achieve good performance in densification. The process is cumbersome, the equipment requirements are high, and the efficiency is low.

Method used

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  • Silicon carbide reinforced aluminum-based composite material and its preparation method
  • Silicon carbide reinforced aluminum-based composite material and its preparation method
  • Silicon carbide reinforced aluminum-based composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Step 1. Ball milling of the original powder: add aluminum matrix powder and 5% beta phase silicon carbide micron and nano spherical particles (also called "powder", such as figure 2 and image 3 shown), the composite powder was obtained after ball milling at a speed of 144r / min for 30min.

[0031] Step 2, cold press molding: put the obtained composite powder into a powder metallurgy mold, and hold the pressure at 200 MPa for 3 minutes for cold press molding.

[0032] Step 3, sintering: put the cold-pressed blank into an atmosphere-protected box-type electric furnace for sintering in an argon-protected atmosphere, the sintering temperature is 580° C., and the sintering time is 5 hours.

[0033] Step 4. Air hot pressing: put the sintered billet into the hot pressing mold, put them into the atmosphere protection box-type electric furnace together, preheat to 550°C in the argon protection atmosphere and keep it warm for 2 hours, take it out, and press it in t...

Embodiment 2

[0035] Example 2:The difference between this example and Example 1 is that silicon carbide micron powder is used in the composite powder. For the difference in mechanical property data, please refer to Figure 5 and Figure 6 shown.

Embodiment 3

[0036] Example 3: The difference between this embodiment and embodiment 1 is that the ball milling time in step 1 is 10 min.

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Abstract

The invention relates to a silicon carbide reinforced aluminum-based composite material and its preparation method. The composite material is characterized by being composited by micron-scale and nano-scale beta-phase silicon carbide spherical particles and an aluminum substrate, with the beta-phase silicon carbide spherical particles distributed in the aluminum substrate to form a synergistic reinforced phase. The preparation method is summarized to be mainly composed of: pre-preparing beta-phase silicon carbide spherical particles, adding aluminum substrate powder and the beta-phase silicon carbide spherical particles accounting for 0-25wt% of the composite material into a ball mill for ball milling treatment, and conducting cold press molding, sintering, as well as air hot pressing sequentially, and finally carrying out hot extrusion molding to obtain a molded product of the composite material. Specifically, the particle size of the aluminum substrate powder is 1micrometer to 100micrometers. The technical scheme of the invention innovatively uses spherical particulate beta-phase silicon carbide and makes use of the synergistic reinforcement effect of the micron and nano-silicon carbide particles, substantially improves the strength, toughness, abrasion resistance and others of the aluminum-based composite material. The preparation process is simple, and the cost input is effectively reduced.

Description

Technical field [0001] The present invention involves an aluminum -based composite material and its preparation process, and specially involves a collaborative enhanced aluminum -based composite material and preparation method of Beta silicon carbide micro -nano -shaped granules. Background technique [0002] Silicon carbide enhanced aluminum base composite materials have the advantages of light quality, high strength, wear resistance, low thermal expansion factor, good size stability, corrosion resistance, high temperature resistance, etc. It is the fields of aerospace, special equipment, precision instruments, transportation and other fieldsThe important supporting materials for the development trend of lightweight are high -performance composite materials for the development of countries around the world.Studies have shown that the size of silicon carbide particles has an important impact on the performance of composite materials.When the size of silicon carbide particles is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00
Inventor 李清文田秀梅吴昊陈名海
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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