An assessment of the ordered phases in Mn–Ni using two- and four-sublattice models

Abstract

Abstract A thermochemical optimisation of the intermetallic phases in the Mn – Ni system is presented using the CALPHAD approach. The ordered phases of the fcc family are described with a 4-sublattice model and the ordered B2 phase is described with a 2-sublattice model. The L1 and L1 branches are transformed from the 4-sublattice representation into equivalent 2-sublattice descriptions in order to combine the data with existing databases which are usually based on 2-sublattice models only for the description of ordering phases.