Abstract
Plasma nitriding is widely used commercially to harden metal surfaces and is usually achieved by exposing the surface to a high voltage electrical discharge through nitrogen at low pressure. But André Ricard and colleagues have now shown (J. Phys. B: At. Mol. Opt. phys. 21 L579) that nitriding is feasible – in the laboratory at least – at atmospheric pressure, raising the prospect of significant commercial benefits.

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