Fabrication of Al-Ti-C master alloys has long been considered to be confined to poor wettability between graphite and molten aluminum. Here, by using X-ray diffractometer, scanning electron microscope and transmission electron microscope as probes, we unveil the effect of Ce on Al-5Ti-0.25C microstructure in detail. This study demonstrates that the formation of Ti2Al20Ce originates from Ce atoms doped in TiAl3 lattice and their interface presents a vague and non-splittable state filled with considerable dislocations. The formation nature of Ti2Al20Ce is the only planner in the formation of enwrapped-like structure of Ti2Al20Ce enwrapped around TiAl3. Due to the above reason, Ce is endowed with an outstanding modification effect on TiAl3 and thus TiAl3 morphology changes from long-strip to block-like based on statistics of aspect ratio and mean area. XRD quantitative calculation demonstrates that 1 wt Ce would rapidly increase TiC content from 0.36 to 0.92 wt.
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