Oxidation Behavior of Maraging 300 Alloy Exposed to Nitrogen/Water Vapor Atmosphere at 500 °C
| Autor: | Joan Josep Roa Rovira, Moises Bastos-Neto, Mauro Andres Cerra Florez, Marcelo José Gomes da Silva, Antonio Manuel Mateo García, Gemma Fargas Ribas, J. L. Cardoso, Hamilton Ferreira Gomes de Abreu |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Ciència i Enginyeria dels Materials, Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials |
| Rok vydání: | 2021 |
| Předmět: |
spinel
Materials science Alloy Spinel Oxide chemistry.chemical_element 02 engineering and technology engineering.material Oxidació 010402 general chemistry 01 natural sciences chemistry.chemical_compound Sliding properties Oxidation General Materials Science Surface layer maraging alloy Spectroscopy Magnetite Mining engineering. Metallurgy Maraging alloy Metallurgy TN1-997 Metals and Alloys oxidation process Hematite 021001 nanoscience & nanotechnology XRD study 0104 chemical sciences Enginyeria dels materials::Metal·lúrgia [Àrees temàtiques de la UPC] Nickel chemistry Metals visual_art sliding properties Raman spectroscopy Oxidation process visual_art.visual_art_medium engineering 0210 nano-technology Cobalt Layer (electronics) Metalls |
| Zdroj: | Repositório Institucional da Universidade Federal do Ceará (UFC) Universidade Federal do Ceará (UFC) instacron:UFC Metals, Vol 11, Iss 1021, p 1021 (2021) UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Metals Volume 11 Issue 7 |
| ISSN: | 2075-4701 |
| Popis: | Aging heat treatments in maraging steels are fundamental to achieve the excellent mechanical properties required in several industries, i.e., nuclear, automotive, etc. In this research, samples of maraging 300 alloy were aged using a novel procedure that combines different steps with two atmospheres (nitrogen and water vapor) for several hours. The oxidized surface layer was chemical, microstructural and micromechanically characterized. Due to the thermodynamic and kinetic conditions, these gases reacted and change the surface chemistry of this steel producing a thin iron-based oxide layer of a homogeneous thickness of around 500 nm. Within the aforementioned information, porosity and other microstructural defects showed a non-homogeneous oxide, mainly constituted by magnetite, nickel ferrite, cobalt ferrite, and a small amount of hematite in the more external parts of the oxide layer. In this sense, from a chemical point of view, the heat treatment under specific atmosphere allows to induce a thin magnetic layer in a mixture of iron, nickel, and cobalt spinel ferrites. On the other hand, the oxide layer presents an adhesive force 99 mN value that shows the capability for being used for tribological applications under sliding contact tests. |
| Databáze: | OpenAIRE |
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