Abstract
Reaction sintering of TiN with B4C addition was developed to densify the composite without the application of external pressure. The process utilizes high affinity of B for Ti which leads to the formation of extremely fine highly active TiB2. The addition of 6–8 wt% B4C is sufficient to increase the sintered density to over 96% theoretical density, fracture toughness to 3.5 MPa·m1/2, flexural strength to 415 MPa, and hardness to ∼14 GPa. The major toughening mechanism was identified to be the crack deflection caused by the presence of hard and tough TiB2 particles. The large improvements in mechanical properties make this in situ produced composite viable material for applications requiring higher level of reliability.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
