Abstract:

Since some transition metal diborides have the same crystal structure of TiB2, they can react with TiB2 to form solid solution composites by adequate
technique. In this paper, the TiB2-NbB2 solid solution composite was prepared by hot pressing. The effects of additive content on mechanical properties of composite
were investigated. The microstructure analyses were made by EPMA, SEM and TEM. Results show that TiB2 can partly form solid solution with NbB2 and redound
to gain uniform grains, which results in the improvement of mechanical properties.

Key words: hot pressing, TiB₂-NbB₂, mechanical properties, structure