Al2O3-Cu-Mo hybrid composites: fabrication, microstructure, properties
Justyna Zygmuntowicz , Agata Łukasiak , Paulina Piotrkiewicz , Waldemar Kaszuwara
AbstractThe work investigated the influence of the share of metallic components on the microstructure and selected properties of Al2O3-Cu-Mo composites. Commercial powders were used to produce the composite samples. The composites were obtained by the slip casting method. Three series of composites with a different volumetric composition of metals in the total content of the metallic phase were obtained: Series I - contained 7.5 vol.% Cu - 7.5 vol.% Mo, Series II - contained 10 vol.% Mo - 5 vol.% Cu and Series III - contained 12 vol.% Mo - 3 vol.% Cu. All the series contained 15 vol.% metal particles with respect to the total solid phases. Rheological analysis showed that the slurries used to make the composites were shear thinning fluids. The X-ray analysis showed that regardless of the volume content of copper in the suspensions used to form the composite, all the composites after sintering were characterized by the presence of three phases: Al2O3, Cu and Mo. It was found that the microstructure in all the series is characterized by homogeneous distribution of the metal particles. All the samples were characterized by high porosity, which resulted in their low relative density. The volume fractions of molybdenum and copper in the composite slightly do affect the hardness and fracture toughness of the composite. The obtained hardness results indicate that increasing the molybdenum content in the composites causes an insignificant increase in the hardness of the samples.
|Journal series||Composites, Theory and Practice, ISSN 2084-6096, e-ISSN 2299-128X, (N/A 20 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||alumina, slip casting, hybrid composites, Al2O3-Cu-Mo|
|Score||= 20.0, 30-12-2019, ArticleFromJournal|
|Publication indicators||= 0|
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