One-stage method for preparing metal matrix light-weighted composite material
A composite material and metal-based technology, which is applied in the field of preparing metal-based lightweight composite materials, can solve the problems of complex preparation process, high density and high cost, and achieve the effects of simple process flow, reduced density and fewer steps.
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[0023] In this embodiment, aluminum alloy is selected as the base metal, and SiC hollow spheres and Al mixed in any proportion are selected. 2 O 3 Hollow sphere 5, the diameter of the hollow sphere is 0.5mm-5mm, SiC hollow sphere and Al 2 O 3 The hollow sphere has high melting point and high hardness, and can be fully mixed with aluminum alloy without significantly reducing the compressive properties of the alloy material.
[0024] The mould used in the preparation method (see figure 2 ) consists of a pressure holding mold 1, a crucible 2, a resistance heating furnace 3, a macroporous porous ceramic or graphite plate 4, a vacuum chamber 6, a small porous ceramic or graphite plate 7 and a vacuum system 8. The preparation steps are: (1) pickling hollow spheres with a diameter of 0.5-5mm or heat treatment at 300-800 DEG C for 2-5h; (2) padding a commercially available 0.2mm-thick 10mm hole at the bottom of the casting mold The small-pore porous ceramic or graphite 7, and the...
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