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Materials Data on Ni3Mo by Materials Project

Ni3Mo is beta Cu3Ti structured and crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. Mo is bonded to twelve Ni atoms to form MoNi12 cuboctahedra that share corners with two equivalent MoNi12 cuboctahedra, corners with sixteen NiNi8Mo4 cuboctahedra, edges with six equivalent MoNi12 cuboctahedra, edges with twelve equivalent NiNi8Mo4 cuboctahedra, faces with six equivalent MoNi12 cuboctahedra, and faces with fourteen NiNi8Mo4 cuboctahedra. There are a spread of Mo–Ni bond distances ranging from 2.51–2.59 Å. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded to four equivalent Mo and eight Ni atoms to form NiNi8Mo4 cuboctahedra that share corners with four equivalent MoNi12 cuboctahedra, corners with fourteen NiNi8Mo4 cuboctahedra, edges with six equivalent MoNi12 cuboctahedra, edges with twelve NiNi8Mo4 cuboctahedra, faces with four equivalent MoNi12 cuboctahedra, and faces with sixteen NiNi8Mo4 cuboctahedra. There are a spread of Ni–Ni bond distances ranging from 2.50–2.59 Å. In the second Ni site, Ni is bonded to four equivalent Mo and eight equivalent Ni atoms to form distorted NiNi8Mo4 cuboctahedra that share corners with eight equivalent MoNi12 cuboctahedra, corners with ten NiNi8Mo4 cuboctahedra, edges with eighteen NiNi8Mo4 cuboctahedra, faces with six equivalent MoNi12 cuboctahedra, and faces with fourteen NiNi8Mo4 cuboctahedra.

36 MATERIALS SCIENCE↗

Physicochemical investigation of NiAl with small molybdenum additions

Specimens of four cast NiAl alloys, three of them containing 0.5, 1.0 and 1.5 at. % Mo., were homogenized for 10, 10, and 140 hr at 1373, 1523 and 1273 K, respectively, then kept at 1073, 1173 and 1323 K for 60, 120 and 3 hr, respectively, and quenched in icy water. The precipitation of a metastable Ni3Mo phase was observed at temperatures between 1073 and 1523 K. Molybdenum substituted for nickel was found to inhibit the lattice disordering in NiAl at 1073 and 1523 K.

Troshkina, V. A.↗

Precipitation in a rapidly solidified and aged Ni-Al-Mo alloy

The early stages of decomposition of a highly supersaturated nickel-base alloy have been studied using TEM, SEM, and X-ray diffraction. The material was produced as a metastable solid solution by chill-block melt-spinning. On aging, the material exhibited a number of decomposition products appearing in series or concomitantly. Some of the decomposition products of this alloy, Ni4Mo, Ni3Mo, and Ni2Mo, are related to those found in Ni-Mo binary alloys. Alpha-Mo formed during solidification was distinguished from that formed by precipitation in the solid state by orientation relationships.

Nash, P.↗