| Texto completo | |
| Autor(es): |
Figueroa‚ CA
;
Alvarez‚ F.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Applied Surface Science; v. 253, n. 4, p. 1806-1809, 2006. |
| Resumo | |
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. (AU) | |
| Processo FAPESP: | 04/01977-9 - Estudo da nano e microestrutura de ligas metálicas contendo nitrogênio implantado por plasma pulsado e feixe iônico |
| Beneficiário: | Carlos Alejandro Figueroa |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |