Zirconium carbide and zirconium nitride are refractory solids. Binary compounds such as tungsten carbide or boron nitride can be very refractory. Boron carbide and cubic boron nitride powders are widely used as abrasives. Also common are silicon carbide, tungsten carbide and garnet. The burrs are usually made of tungsten carbide or diamond. The material is usually called cemented carbide, solid carbide, hardmetal or tungsten-carbide cobalt. This is why there are many more bullets made with tungsten instead of tungsten carbide. Most other core materials would have effects between lead and tungsten carbide. The anvils were made of tungsten carbide (WC). Boron is a useful dopant for such semiconductors as silicon, germanium, and silicon carbide. Nikasil is short for Nickel Silicon Carbide. Carbon fibre, silicon carbide, and polyethylene are rare. Grains of silicon carbide and graphite also have anomalous isotopic patterns. Combination reamers can be made out of cobalt, carbide, or high speed steel tooling. These "Chicken Plates" were made of either boron carbide, silicon carbide, or aluminium oxide.