Structural, morphological and interfacial characterization of Al-Mg/TiC composites
- Instituto Mexicano del Petroleo, Programa de Investigacion en Ductos, Corrosion y Materiales, Eje Central Lazaro Cardenas 152, San Bartolo Atepehuacan, C. P. 07730, Mexico D.F. (Mexico)
- Instituto de Ciencias Fisicas, Universidad Nacional Autonoma de Mexico, P. O. Box 48-3, Cuernavaca, Mor (Mexico)
Morphological and structural characterization of Al-Mg/TiC composites obtained by infiltration process and wetting by the sessile drop technique were studied. Focusing at the interface, wetting of TiC substrates by molten Al-Mg-alloys at 900 deg. C was investigated. Electron probe microanalysis (EPMA) indicated that aluminum carbide (Al{sub 4}C{sub 3}) is formed at the interface and traces of TiAl{sub 3} in the wetting assemblies were detected. Scanning Electron Microscopy (SEM) observations show that TiC particles do not appear to be uniformly attacked to produce a continuous layer of Al{sub 4}C{sub 3} at the interface. Molten Al-Mg-alloys were infiltrated into TiC preforms with flowing argon at a temperature of 900 deg. C. In the composites no reaction phase was observed by SEM. Quantification of the Al phase in the composite was carried out by X-ray diffraction (XRD) and Rietveld analysis. Chemical mapping analyzed by SEM shows that the Al-Mg alloy surrounds TiC particles. In the composites with 20 wt.% of Mg the Al-Mg-{beta} phase was detected through XRD.
- OSTI ID:
- 21003572
- Journal Information:
- Materials Characterization, Vol. 58, Issue 8-9; Conference: 14. International materials research congress: Symposium 7, Cancun (Mexico), 21-25 Aug 2005; Other Information: DOI: 10.1016/j.matchar.2006.11.031; PII: S1044-5803(06)00347-0; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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