Melting the Unmeltable

There are many ways to melt metal, but an arc furnace can liquefy almost anything you put in it, using only electricity.

By Theodore Gray Posted 05.01.2004 at 2:00 pm 0 Comments

by Jeff Sciortino Jeff Sciortino

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Dept: Gray Matter

Element: Tungsten

Project: Arc melting

Cost: $220

Time: 30 minutes

DABBLER | | | | | MASTERAbout a century ago, having no television for entertainment, a famous French chemist named Henri Moissan decided to see what would happen if he stuck two carbon-graphite electrodes into an insulated box and ran a lot of electric current through them. He figured if he trapped and concentrated the heat produced by the arc he struck, he might be able to do something neat with it. (Yes, scientists get paid for thoughts like these.)

Moissan’s hunch was right—boy, was it right. He quickly found that with temperatures reaching 5,000

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