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Evaluation of SiC-particle connectivity in functionally graded Al/SiCp composit...
Velhinho, A.; Vignoles, G.; Cloetens, P.; Thibault, X.; Boller, E.; Fernandes, F. M. Braz; Rocha, L. A.; Botas, J. D.Reliability of functionally graded metal matrix composites (FGMMCs) for automotive components is still dependent on the detailed knowledge of the mechanisms of the microstructural build-up, for instance on the mechanisms leading to the distribution and relative positions of the reinforcing particles. In order to assess the influence of the SiC particle size on the 3-D inter-particle connectivity in functionally...
Tribocorrosion studies in centrifugally cast al-matrix siCp-reinforced function...
Velhinho, A.; Botas, J. D.; Ariza, E.; Gomes, J. R.; Rocha, L. A.The present work reports results obtained from a series of preliminary experiments aiming at complementing the current knowledge about the wear behaviour of centrifugally-cast FGM Al/SiCp composites, through concurrent corrosion processes. Precursor MMC’s were prepared by rheocasting, using 118.8 µm SiC particles and an Al-10Si–2.2 Mg alloy. Those MMC’s were then molten and centrifugally cast in order to produc...
Sarcoidosis as a cause of febrile++ syndrome of unknown origin. Retrospective s...
Freitas, L; Serviço de Doenças Infecciosas, Hospital de Santa Maria, Lisboa.; Botas, J; Fernandes, V; Boaventura, J L; Ferreira, M LThe authors report the results of a retrospective study of patients admitted to the Department of Infectious Diseases of Santa Maria Hospital with the diagnosis of sarcoidosis, from June 1982 to August 1991. Seven out of eight patients, were admitted due to fever of unknown origin. The results are discussed and the literature on sarcoidosis is also reviewed. ; The authors report the results of a retrospective ...
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