Six The sponge electrode is then positioned in a very vacuum arc furnace for melting. In this water-cooled, copper container, an electric arc is used to soften the sponge electrode to type an ingot. The large sublimation temperature of SiC (around 2,700 °C) makes it practical for bearings and furnace https://brooksmifzv.muzwiki.com/7767599/indicators_on_iron_oxide_red_you_should_know