Investigations of Chromium - gas surface reaction with the field ion microscope and atom probe

Lattice plane specific surface reactions of chromium with hydrogen, nitrogen, and oxygen have been studied with the field ion microscope at 21 and 78 K with neon as imaging gas. The field desorption spectra show mainly Cr**2** plus at the applied field strengths, but also complex ions of chromium with the applied gases preferentially as double-charged ions.