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Synthesis process of a TiAl+TiB_2 composite from the elemental powders was studiedby means of differential scanning calorimetry and X-ray diffractometry.TiB_2 particlesmay form in TiAl matrix at temperature even below 700℃ owing to the exothermicreactions between Ti and Al powders.TiB_2 particles are very thermally stable,and theyalmost did not change in their relative amount,morphology and size after the synthesizedcomposite was remelted.In addition,the existence of TiB_2 particles has obvious refiningeffect in the as-cast microstructure of TiAl-base alloys.
Synthesis process of a TiAl + TiB_2 composite from the elemental powders was studied by means of differential scanning calorimetry and X-ray diffractometry. BiB particlesmay form in TiAl matrix at temperature even below 700 ° C due to the exothermic reactions between Ti and Al powders. BiB particles are very thermally stable, and theyalmost did not change in their relative amount, morphology and size after the synthesizedcomposite was remelted.In addition, the existence of TiB2 particles has obvious refiningeffect in the as-cast microstructure of TiAl-base alloys.