Abstract
This study aims to analyze the effect of boron nitride (B
4
N) additive (3–6%) on the densification, microstructure, mechanical properties, and wear performance of TiB
2
–15%Si
3
N
4
and TiB
2
–30%Si
3
N
4
sintered composites. When the B
4
N (3%) was added to the TiB
2
–30Si
3
N
4
composite, the density increased to 99.5%, hardness increased to 25.2 MPa, and the fracture toughness increased to 4.62 MPam
1/2
. Microstructural analysis shows that in situ phases such as TiB
2
help to improve the relative mechanical characteristics. However, raising the B
4
N additive to 6% in the above-sintered composite reduces the composites’ relative density and hardness. The tested sintered composites demonstrated that their superior wear resistance can be attributed to their increased density and hardness.