Austenite is a solid and, in general, will be polycrystalline. The formation of ferrite and iron carbide will start at the austenite grain boundaries and the final pearlite microstructure will have ...

But such is the case for tungsten carbide inserts, the flecks of material that form the business end of most of the tools used to shape metal. And thanks to one of the biggest suppliers of inserts ...

The business end of the iron is a normal soldering iron bit, but behind it is a piece of sintered silicon carbide wrapped in ceramic fibre and covered with Kapton tape and a high-temperature-resin ...