C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 21/00 (2006.01) B22D 25/00 (2006.01) C22C 1/08 (2006.01) C22C 1/10 (2006.01) C22F 1/04 (2006.01)
Patent
CA 2046814
A novel lightweight gas-metal composite is produced having isolated particle-stabilized pores. A composite of a metal matrix, e.g. aluminum, and finely divided solid stabilizer particles, e.g. silicon carbide, is heated above the liquidus temperature of the metal matrix and this is mixed such that a vortex is formed. The molten composite is blanketed with a gas and during the vortex mixing. This gas is drawn into the melt to produce an expanded, viscous molten composite material containing pores which are very small, spherical-shaped and quite evenly distributed. The viscous molten composite material can be directly formed into a solid shaped product and is also capable of being remelted and formed by forming processes without destroying the integrity of the pores. The result is a lightweight expanded metal product capable of being formed into shapes to close dimensional tolerances.
Jin Iljoon
Kenny Douglas Lorne
Sang Harry
Thomas Martin
Alcan International Limited
Kirby Eades Gale Baker
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