| 摘要 |
PROBLEM TO BE SOLVED: To lighten the composite material without deteriorating fire-proof property, heat resistance, workability or rigidity at low cost, and improve heat resistance, specific compression strength, and shock adsorption property by evenly filtrate dispersing a molten aluminum in a light ceramic fine hollow trains of high pressure resistance, heat resistance. SOLUTION: A mold is filled with ceramic fine hollow grains which have compression strength of 600 kgf/cm2 or more, bulk specific gravity of 0.3-0.5 g/cm3, and melting temperature of 1,500 deg.C or more, at about 70 mass %. Then, molten aluminum is poured, and is filtration dispersed evenly, so as to obtain light aluminum composite material. This ceramic fine hollow grains can be obtained by foam-generating ceramic composition material, for example, composed of 50-60% SiO2, 40-45% Al2O3, and 1.5-2.5% of others. Also, it is preferable that grain diameter is at a range of 5-350μm. The grains of such a high compression strength are not broken against high stress and high shearing force in a composite process with aluminum, so as to form a light and dense compound material with about 1.06 specific gravity easily.
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