SiC-Based Composite Material Reinforced with Molybdenum Wire

Silicon carbide (SiC) possesses a unique combination of properties such as high mechanical strength at elevated temperatures, wear resistance, low thermal expansion coefficient, temperature oxidation corrosion stability, radiation hardness, chemical inertness, and conductivity. Unfortunately, SiC is very brittle cannot, therefore, be used “as is”. SiC’s crack due to the prevention propagation, can increased by reinforcing SiC. In this paper, novel method for manufacturing SiC-based composites reinforced with Mo wire developed. The are produced infiltrating porous carbon blanks molten silicon. silicon reacts molybdenum embedded in blanks. As result, complex interfacial silicide layer predominant MoSi2 phase formed on surface wire. addition, thin Mo5Si3 between residual metal core disilicide. A stable bond both ceramic matrix observed. Mechanical tests obtained samples three-point bending 20 1500 °C showed quasi-plastic damage. elements act stoppers propagating cracks event failure. developed producing makes it possible reduce cost machining products geometric shapes. It also opens way broader applications composites.