Figure 4
TEM observation of the coarsening of carbides during in situ heating: (a) carbides were not formed at 200 °C; (b) the SAED pattern obtained from the outlined region indicated by a dashed circle in (a,c–f) the morphology of carbides (θ-Fe3C particles) from 300–500 °C. All bright-field TEM images have the same scale bar as that shown in (f).
