“…2 [26]. The Ni/CoSb 3 interfacial reaction rates are significantly lower than those between solders, such as Sn and Sn-Ag, and those of CoSb 3 thermoelectric substrates materials, Co, Sb and CoSb 3 [27][28][29]. Furthermore, as can be observed from all the figures, the Ni layer attaches very well to the CoSb 3 substrate.…”