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RESEARCH PRODUCT
Ceramic/metal nanocomposites by lyophilization: Spark plasma sintering and hardness
J.s. MoyaC. F. Gutiérrez-gonzálezSonia López-estebanRamón TorrecillasRamón TorrecillasSaid Agouramsubject
Materials scienceNanocompositeProcess Chemistry and TechnologySpark plasma sinteringMechanical propertiesNanocompositesSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialslaw.inventionHardnessTransmission electron microscopylawFreeze-dryingvisual_artVickers hardness testMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumZrO2Cubic zirconiaNanometreCalcinationCeramicComposite materialdescription
The present study is focused on the procedure of spray-drying and lyophilization techniques for the preparation of ceramic/metal nanocomposites. The results of the study at all stages are compared with those corresponding to powders conventionally dried by heating in furnace. Starting from aqueous solutions of metal salts and ceramic powders, the procedure follows with spray-drying, lyophilization, calcination of the resulting powders and subsequent Spark Plasma Sintering (SPS). X-ray diffraction analysis of the powders at different stages of the processing routes was used for phase indexing; further characterization was performed by Transmission Electron Microscopy and Energy Dispersive X-Ray Spectroscopy, revealing that the sizes of the metal particles obtained are in the nanometer range and appear homogeneously and well dispersed on the zirconia surface. The mechanical performance of the SPSed compacts was studied by means of the Vickers hardness, showing excellent results: an increase of 30% with respect to pure zirconia. © 2013 Elsevier Ltd and Techna Group S.r.l.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-04-01 | Ceramics International |