Calculated phase diagram of the Ni-Mo-B ternary system

The phase diagram of the Ni-Mo-B ternary system in the region of less than 50 mol%B was constructed by thermodynamic calculation. We found three terna ry eutectic points and three ternary peritecto-eutectic points as follows: E-1: L(1365 K, 71.5 mol%Ni-6.0 mol%Mo-22.5 mol%B)=(Ni)+Ni3B+NiMo2B2. E-2: L(1355 K, 62.5 mol%Ni-2.5 mol%Mo-30.5 mol%B)=Ni3B +Ni2B + NiMo2B2, E-3: L(1445 K, 42.0 mol%Ni-30.6 mol%Mo-10.3 mol%B)=(Ni) + NiMo + NiMo2B2. P-1: L(1812 K, 34.9 mol%Ni-42.3 mol%Mo-22.8 mol%B) + MoB =Mo2B + NiMo2B2. P-2: L(1633 K, 42.3 mol%Ni-40.4 mol%Mo-17.3 mol%B) + Mo = Mo2B + NiMo2B2. P-3: L(1478 K, 53.5 mol%Ni-33.7 mol%Mo-12.8 mol%B) + Mo = NiMo + NiMo2B2. The calculated phase diagram is expected to be useful for the development o f new Ni-based heat-, corrosion- or wear-resistance alloys, (C) 2001 Elsevi er Science B.V. All rights reserved.