Abstract
Aluminum matrix composites reinforced with more that 50 vol.% of SiC particles were fabricated using oxyacetylene thermal spraying. The sprayed material consisted of mixtures of aluminum powder with 60-85 vol.% of SiC particles. To favor the processing of the composite, in some cases, the SiC particles were coated with silica following a sol-gel route. This allowed obtaining as-sprayed samples with thickness above 2 mm and with porosity values below 2%. Post-processing of the samples by hot pressing allowed to reduce further the porosity of the composites and to enhance their microstructural homogeneity. The whole process of spraying and hot pressing has been optimized and the role played by the different spraying parameters and by time length and temperature of hot pressing has been also studied.
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Acknowledgment
The authors thank the Ministerio de Educación y Ciencia (MAT2004-06018) and Universidad Rey Juan Carlos and Comunidad de Madrid (URJC-CM-2007-CET-1659).
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Torres, B., Rodrigo, P., Campo, M. et al. Oxy-Acetylene Flame Thermal Spray of Al/SiCp Composites with High Fraction of Reinforcements. J Therm Spray Tech 18, 642–651 (2009). https://doi.org/10.1007/s11666-009-9393-3
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DOI: https://doi.org/10.1007/s11666-009-9393-3