Patent ID: 7901521

Claim:
An aluminum base alloy obtained by supercooling a molten alloy composed mainly of aluminum, wherein the molten alloy contains an element Q 1 capable of forming a quasicrystalline phase, an element Q 2 for aiding formation of the quasicrystals, and an element P 1 for stabilizing the supercooled state of the molten alloy and delaying crystallization of the crystalline phase, and the aluminum base alloy consists of non-quasicrystalline-phase-containing composition composed of a mixed composition of a fine amorphous phase and an aluminum crystalline phase or an aluminum supersaturated solid solution phase, or a single phase of only an amorphous phase, wherein the aluminum base alloy has a hardness from about 350 to about 580 Hv, and wherein a volume fraction of the amorphous phase is 50% or more with respect to the whole volume of the aluminum base alloy.