Zirconium carbide (ZrC) is a very tricky refractory ceramic material. It is usually processed by sintering. It's the appearance of a grey metallic powder with cubic crystal structure. The colour alterations to blue and black at increased distance with the resistor, and these darker crystals are considerably less pure. Nitrogen https://josuejkihf.blogozz.com/33491766/helping-the-others-realize-the-advantages-of-black-silicon-carbide