Artículos de revistas
On the hydrogen etching mechanism in plasma nitriding of metals
Registro en:
Applied Surface Science. Elsevier Science Bv, v. 253, n. 4, n. 1806, n. 1809, 2006.
0169-4332
WOS:000243244200020
10.1016/j.apsusc.2006.03.015
Autor
Figueroa, CA
Alvarez, F
Institución
Resumen
Iron alloys and aluminum were nitrogen implanted in a controlled oxygen atmosphere and the role of hydrogen on the surface etching mechanisms studied. The surface composition was analyzed by in situ photoemission electron spectroscopy (XPS). In iron alloys, hydrogen strongly etches oxygen, improving nitrogen retention on the surface. On the other hand, hydrogen removes nitrogen from aluminum surfaces, with a deleterious effect on the nitriding effectiveness. The oxygen removal in iron alloys is associated with the catalytic effect of electrons in d-orbitals and the nitrogen removal in aluminum is associated with a steric effect. (c) 2006 Elsevier B.V. All rights reserved. 253 4 1806 1809