Assessment of the Aging Response of a Nanocomposite AA 7075 – ZrO2



Título del documento: Assessment of the Aging Response of a Nanocomposite AA 7075 – ZrO2
Revue: Mexican journal of materials science and engineering
Base de datos: PERIÓDICA
Número de sistema: 000392621
ISSN: 0187-5779
Autores: 1
1
2
2
1
Instituciones: 1Universidad Autónoma de San Luis Potosí, Instituto de Metalurgia, San Luis Potosí. México
2Centro de Investigación en Materiales Avanzados S.C., Chihuahua. México
Año:
Volumen: 3
Número: 1
Paginación: 1-6
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Aplicado, descriptivo
Resumen en inglés A metal matrix composite has been produced by mechanical milling, in an horizontal attritor, using powders of the commercial aluminum alloy 7075 (Al-Zn-Mg) as the matrix of the composite, and nanosized particles of ZrO2 were use as reinforcement. The composite was sintered and hot extruded, in order to consolidate the powders of the composite, and submitted to a heat treatment with the aim of age harden it. The Vickers hardness test was discouraging, due to there was no positive response to the aging treatment. This situation was attributed to the reaction in the process carried out at high temperature (sintering and extrusion) between the ZrO2 and the alloying elements Zn and Mg, since intermetallic compounds were found in the X-ray diffraction patterns of the composite. In this way, the matrix was depleted of Zn and Mg, leaving the matrix out of elements in solution in order to precipitate nanoparticles, which could improve the mechanical properties of the alloy, contrary situation found in the composite material
Disciplinas: Ingeniería
Palabras clave: Ingeniería de materiales,
Ingeniería metalúrgica,
Materiales compuestos,
Aleaciones,
Aluminio-Zinc-Magnesio,
Matriz metálica,
Nanopartículas,
Oxido de circonio,
Endurecimiento,
Propiedades mecánicas
Keyword: Engineering,
Materials engineering,
Metallurgical engineering,
Composite materials,
Alloys,
Aluminum-Zinc-Magnesium,
Metallic matrix,
Nanoparticles,
Zirconium oxide,
Hardening,
Mechanical properties
Texte intégral: Texto completo (Ver PDF)