Patent ID: 8854173

Claim:
An Fe-based amorphous alloy powder having a composition represented by a formula: (Fe 100-a-b-c-x-y-z-t Ni a Sn b Cr c P x C y B z Si t ) 100-α M α , wherein an addition amount a of Ni satisfies 0 at %≦a≦10 at %, an addition amount b of Sn satisfies 0 at %≦b≦3 at %, an addition amount c of Cr satisfies 0 at %≦c≦6 at %, an addition amount x of P satisfies 6.8 at %≦x≦10.8 at %, an addition amount y of C satisfies 2.2 at %≦y≦9.8 at %, an addition amount z of B satisfies 0 at %≦z≦4.2 at %, and an addition amount t of Si satisfies 0 at %≦t≦3.9 at %, wherein a metal element M is at least one selected from the group consisting of Ti, Al, Mn, Zr, Hf, V, Nb, Ta, Mo, and W, and an addition amount a of the metal element M satisfies 0.04 wt %≦α≦0.6 wt %, and wherein a concentration of the metal element M is higher in a powder surface layer than that inside the powder.