1983 年 24 巻 9 号 p. 633-641
Microstructural changes near the coherent spinodal line during ageing in Fe–18.5 and 19.2 at%Mo alloys were investigated by means of transmission electron microscopy. A mixed microstructure of the ⟨100⟩ modulated structure and the plate-shaped Mo-rich zones was observed in the alloys aged at a temperature just above the coherent spinodal temperature, Ts. With further ageing this morphological distinction became obscure, and consequently the modulated structure appeared. When the alloy was aged at a higher temperature, the plate-shaped zones were only nucleated on the {100} matrix planes, while the ageing at a temperature just below Ts only produced a typical ⟨100⟩ modulated structure. A series of results implies that the microstructures produced near Ts become continuously inhomogeneous with increasing ageing temperature, which has been proposed by Binder.
