Characterization of TiB 2-AlN composites for application as cutting tool

摘要

Densified ceramic TiB2-AlN composites were prepared by spark plasma sintering and samples were subjected to short time machining tests. The maximum relative density and toughness were 96.9% and 16.2GPa, respectively. Composites with 70wt% AlN and 70wt% TiB2were applied as cutting tools and tested for cutting parameters. Scanning electron microscopy (SEM) allowed the analysis of the microstructure and the wear surfaces after cutting tests. The 70% TiB2composites revealed unsatisfactory performance while the 70wt% AlN disclosed satisfactory cutting performance.