New ternary compound Co3(Ge,W) with L12 structure

• DOI: 10.1016/j.scriptamat.2006.09.007
• Publication Date: 2006-10-20T13:14:34Z
• Authors: Hibiki Chinen; Jun Sato; Toshihiro Omori; Katsunari Oikawa; Ikuo Ohnuma; Ryosuke Kainuma; Kiyohito Ishida
• Keywords: Solvus; Ternary alloy; Ternary compound

Microstructural investigation of the Co–11.0Ge–5.7W (at.%) ternary alloy was conducted. Fine cuboidal precipitates were observed in this alloy annealed at 1173 K and the crystal structure of the precipitate phase was identified as an L12 structure with a composition of Co–12.6Ge–8.2W (at.%). The solvus temperature of this phase was about 1180 K. Since a stable L12 phase has not been reported in the Co–W and Co–Ge binary systems, this ternary compound is a new L12 phase designated as γ′-Co3(Ge, W).