Phase decomposition of Ni5Pb2Te3 in diffusion bonded PbTe-Ni interfaces – A TEM and thermodynamic study

Identification of the Bravais lattice and cell parameters through quantitative model-based transmission electron microscopy and Niggli cell reduction theory: the case of intermetallic Ni5Pb2Te3

“…Second, the method is applied to identify the Bravais lattice of a ternary Ni 5 Pb 2 Te 3 phase and determine the unit-cell parameters. This phase forms at a higher temperature during PbTe-Ni interaction, a classical case study of a contact problem (semiconductor-metal) in thermoelectric devices (Xia et al, 2014;He et al, 2018;Liu & Bai, 2019;Kumar et al, 2022). Therefore, the characterization of its crystal structure is crucial in understanding microstructure evolution and the impact of the phase on the interface properties.…”