Effect of rare earth oxide additions on oxidation behavior of AISI 304L stainless steel

Autor(es)

Marina Fuser Pillis ^[1] ; Edval Gonçalves de Araújo ^[2] ; Lalgudi Venkataraman Ramanathan ^[3]

Afiliação do(s) autor(es)

^[1] Instituto de Pesquisas Energéticas e Nucleares. Materials Science and Technology Center - Brasil

^[2] Instituto de Pesquisas Energéticas e Nucleares. Materials Science and Technology Center - Brasil

^[3] Instituto de Pesquisas Energéticas e Nucleares. Materials Science and Technology Center - Brasil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 9, n. 4, p. 375-379, 2006-12-00.

Resumo

AISI 304L stainless steel powder compacts containing 2 vol% high purity rare earth oxides were prepared by mixing the different powders in a vibratory mill followed by pressing. The compacts thus obtained were sintered in a vacuum furnace and isothermal oxidation measurements were carried out in a muffle furnace, in air, up to 200 hours at 900 °C. The oxidized surfaces were examined in a scanning electron microscope and micro regions of the reaction products were studied using energy dispersive analysis. The addition of rare earth oxides decreased the oxidation rate of the stainless steel. Further evidence of predominant oxygen ion diffusion controlling the overall oxidation process in rare earth containing chromium oxide forming alloys has been observed. (AU)

• Processo FAPESP: 01/13748-6 - Efeito da adição de óxidos de terras-raras sobre a resistência a oxidação de ligas formadoras de cromia
• Beneficiário: Marina Fuser Pillis
• Modalidade de apoio: Auxílio à Pesquisa - Regular