2005 Volume 46 Issue 3 Pages 575-580
The spark plasma sintered in situ TiB reinforced titanium metal matrix composite was investigated by EBSD and TEM. The sintered composite consists of 30.8% α-Ti phase, 55.7% β-Ti phase and 12.9% in situ TiB reinforcements. Most of the TiB whiskers distributed along phase boundaries between α-Ti and β-Ti, others located within α-Ti and β-Ti grains. Some β-Ti grains with parallel TiB whiskers were observed in the orientation imaging micrograph (OIM). The TiB grows along  direction and forms whisker with a hexagonal cross-section. The  direction of paralleled TiB whiskers is parallel to  direction of cubic β-Ti. High density stacking faults are formed in (100)TiB planes to minimizing the lattice mismatch between TiB and the Ti matrix.