Low temperature production of boron carbide and its characterization

Boron carbide is a significant product among hundreds boron compounds which has high market capacity. Boron carbide has a special place in advanced technology ceramic materials. It has many military and civil application areas with its properties such as high neutron absorption capacity, extreme hardness, low density, inert with chemicals, heat resistance. Boron carbide is used in industry as grinder, polisher and abrasive powder due to these properties. Due to its hardness and lightness, it has many application areas such as mechanical accessories of military oriented helicopters and planes, reinforcement armor of battle vehicles? armors and protecting of military staff.Various methods available for production of boron carbide. Some of those are, mechanical alloying, sol-gel, chemical vapor deposition, self propagating high temperature synthesis and carbothermal reduction. Common point of these methods is requirement of high energy. In this work, the aim is synthesize of boron carbide powder at low temperatures with co-reduction method. BBr3, CCl4 and Na (which is co-reductant) was used as raw materials. In this work, reaction was performed at 3 different temperatures (400°C, 450°C, 500°C) and 5 different reaction times from 2 to 10 hours. Characterization of end products was carried out with FT-IR, TGA/DT, XRD and particle size distribution analyses. As a result, powder which was obtained at 450°C and 8 hours, is a micron size powder and this powder is a boron carbide precursor material. After sintering 3 hours at 700°C, XRD analysis was performed and this analysis was showed that crystallization of boron carbide has begun.