Sintering Behavior and Mechanical Properties of Ti-TiBw Composites Prepared with Pre-alloyed Ti-TiBw Composite Powders

Prealloyed powders present a promising alternative to traditional ball milling processes in powder metallurgy, addressing challenges such as uneven powder mixing and incomplete reinforcement reactions. This study investigates the preparation of Ti-TiBw composites using spark plasma sintering (SPS) at temperatures ranging from 950 to 1050 degrees C, utilizing Ti-TiBw prealloyed composite powders. The effects of sintering temperature on the microstructure and mechanical properties of Ti-TiBw composites are studied, comparing prealloyed composite powders with ball-milled premixed powders. As a result, the composites exhibit excellent strength and ductility, with an ultimate tensile strength of 676 MPa at 1000 degrees C and an elongation of 20.42% at 1050 degrees C. Comparatively, Ti-TiBw composites prepared from premixed powders achieve densification at 1050 degrees C, 50 degrees C higher than those prepared from prealloyed powders.