Pressure infiltration of Al–12 wt.% Si–X (X = Cu, Ti, Mg) alloys into graphite particle preforms
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Título: | Pressure infiltration of Al–12 wt.% Si–X (X = Cu, Ti, Mg) alloys into graphite particle preforms |
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Autor/es: | Rodríguez Guerrero, Alejandro | Sánchez, S.A. | Narciso, Javier | Louis, Enrique | Rodríguez Reinoso, Francisco |
Grupo/s de investigación o GITE: | Laboratorio de Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Infiltration | Aluminium alloys | Graphite | Particulate reinforced composites |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | abr-2006 |
Editor: | Elsevier |
Cita bibliográfica: | RODRÍGUEZ GUERRERO, Alejandro, et al. "Pressure infiltration of Al–12 wt.% Si–X (X = Cu, Ti, Mg) alloys into graphite particle preforms". Acta Materialia. Vol. 54, Issue 7 (Apr. 2006). ISSN 1359-6454, pp. 1821-1831 |
Resumen: | The pressure infiltration of Al and Al–12 wt.% Si–X alloys into preforms of packed graphite particles has been investigated. Compacts were prepared from particles of average diameter of 15, 27, 64, and 124 lm. While infiltration with pure Al at 750 °C was poor due to both gasification of graphite and reaction between C and Al, the lower infiltration temperature used for the Al–Si eutectic alloy improved infiltration performance. Results for the threshold pressure and infiltration kinetics are discussed in the light of previously published results. Ti (up to 1.5 wt.%) and Cu (up to 1.0 wt.%) additions were found to have no effect on pressure infiltration. However, Mg additions (up to 4 wt.%) significantly decreased the threshold pressure, as a consequence of the decrease in surface tension of Al promoted by this element. Coating the graphite particles with a chemical compound that dissolves the oxide layer reduces the threshold pressure, although this has limited technological applicability due to the increase in porosity. The compact permeability derived from infiltration of the alloys is compared with the intrinsic permeability obtained through infiltration of a wetting organic fluid. |
Patrocinador/es: | This work was partially supported by Spanish MCYT (grants MAT2004-0529) and a European Community project (ALICE, contract GRD 2-2001-50048). |
URI: | http://hdl.handle.net/10045/2662 |
ISSN: | 1359-6454 |
DOI: | 10.1016/j.actamat.2005.11.041 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.actamat.2005.11.041 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas INV - Física de la Materia Condensada - Artículos de Revistas |
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