fig4

Figure 4. Dilatometric thermal expansion behaviors and TEM images of the 5Tb alloy. (A) The thermal expansion curves of 2.5Tb, 5Tb, and 7.5Tb alloys and pure iron along the LD. (B) The thermal expansion curves of 2Er, 4Er, 7Er, and 9Er alloys and pure iron along the LD. (C) The thermal expansion curves along LD, TD- ND plane for 5Tb alloy and 4Er alloy. (D) The thermal expansion curves of 5Tb alloy and 4Er alloy along the LD under the thermal cycling between 77 and 373 K. (E and F) The transmission electron microscope (TEM) (E) and high-resolution transmission electron microscope (HRTEM). (F) of the interface structure between the H and α phases.