|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXII
||3d-transition Metal-tin Compounds
||Andreas Leineweber, Stefan Martin
|On-Site Speaker (Planned)
Late 3d-metals (e.g. Co, Ni, Cu) in contact with tin (e.g during soldering) create a characteristic sequence of phases involving peritectic reactions in the binary phase diagram. These phases are either the most Sn-rich stable phases of the corresponding binary equilibrium phase diagram, or they are even metastable, like NiSn4. The present contribution reviews results on crystal structure and microstructure analysis involving the corresponding phases. Common principles from the different systems in terms of crystal chemistry of the observed phases and their microstructures developing upon reactive phase formation are derived. Special features are discussed like the highly defective character of these phases, especially NiSn4 and CoSn3, if grown at low temperature, e.g. upon interaction of the metal with solid tin. Moreover, characteristic off-equilibrium order-disorder phenomena may occur, like upon cooling of Cu-rich η-Cu6Sn5 developing at elevated temperatures.
||Joining, Solidification, Copper / Nickel / Cobalt