Si3N4 bonded silicon carbide brick is a fresh type of refractory material, in which Si3N4 exists between SiC grains in needle-shaped or fibrous crystalline form. Your flat surface will be immediately ruined by immediate application of silicon carbide powder and oil or water. You are able to usually flip it http://kylerzpqy772.image-perth.org/the-most-common-silicon-carbide-definition-debate-isn-t-as-black-and-white-as-you-might-think