Crystal structure changes in the Ni3Ta intermetallic compound

 

Chem. Met. Alloys 6 (2013) 196-199

 

Tetiana KOSORUKOVA, Georgiy FIRSTOV, Henri NOËL, Volodymir IVANCHENKO

 

The crystal structure changes in Ni3Ta were experimentally investigated by X-ray powder diffraction of alloys prepared by arc melting, ground and annealed in the temperature range 673-1173 K for 1 day. It was found that an increase of the annealing temperatures leads to a change of the product of the transformation of the high-temperature tetragonal phase from monoclinic to orthorhombic. The changes are promoted by recovery and recrystallization processes. Some oxidation at the higher annealing temperatures led to the reappearance of the phase with monoclinic structure.

 

 

Volume fractions of the phases observed in Ni3Ta powders annealed at different temperatures for 1 day

 

Keywords

Phase transformation / Binary compound / Crystal structure