Furthermore, some impurity phases distribute in trigonal grain-boundary, they involved mostly TiO_2, TiC, which possibly influence the mechanical properties of TiB_2 ceramics.

• 同时，在TiB_2晶粒三角晶界处存在着一些杂质沉积相，它主要包括中TiO_2、TiC，可能影响了材料的性能。