NICKEL BASE AMORPHOUS ALLOY COMPOSITION

PROBLEM TO BE SOLVED: To provide an alloy composition composed of a quarternary series having a fundamental composition of nickel, zirconium and titanium and further containing silicon or phosphorous. SOLUTION: The compositional range in the nickel-zirconium-titanium-silicon quaternary alloy lie in nickel of 45 to 63 atomic %, zirconium+titanium of 32 to 48 atomic % and silicon of 1 to 11 atomic % and can be shown by the general formula of Nia(Zr1-xTix)bSic, and further, one or more kinds of elements selected from V, Cr, Mn, Cu, Co, W, Sn, Mo, Y, C, B, P and Al are added by 2 to 15 atomic % to the whole composition. The compositional ranges in the nickel-zirconium-titanium-phosphorous quaternary alloy lie in nickel of 50 to 62 atomic %, ziroconium+titanium of 33 to 46 atomic % and phosphorus of 3 to 8 atomic % and can be shown by the general formula of Nia(Zr1-rTiy)ePf. The alloy has excellent amorphous formability and is produced to a thickness of 1 mm or to a size above that by a casting method.