One Minute Mentor: The S-Phase

The success of plasma and gas nitriding at low temperatures (lower than 840°F) and solution nitriding at high temperatures is associated with the absence of chromium nitride or carbide precipitation, and thus with the formation in the surface layer of a particular phase called the S-phase.

Atom-sized tunnels may lead to better battery

Battery researchers seeking improved electrode materials have focused on “tunneled” structures that make it easier for charge-carrying ions to move in and out of the electrode.