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Characterization of TiB2-AlN composites for application as cutting tool

2018; Elsevier BV; Volume: 7; Issue: 4 Linguagem: Inglês

10.1016/j.jmrt.2018.07.010

2214-0697

Luiz Antônio Fonseca Peçanha, Sérgio Neves Monteiro, Ítalo Tomaz, Marlon Mendes de Oliveira, Alan Monteiro Ramalho, Noan Tonini Simonassi, Fábio de Oliveira Braga,

Metal and Thin Film Mechanics

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 16.2 GPa, respectively. Composites with 70 wt% AlN and 70 wt% TiB2 were 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% TiB2 composites revealed unsatisfactory performance while the 70 wt% AlN disclosed satisfactory cutting performance.