Additive manufacturing of porous Ti6Al4V (Ti64) parts is promising for biomedical applications. In this study, Ti64 scaffolds with two scales of interconnected porosity networks were developed using a direct-ink writing process. Inks were made by dissolving a copolymer (Pluronic F-127) in water to obtain a hydrogel, which was then loaded with Ti64 ...
Published in International Journal of Materials Research
The influence of the carbon introduction method on the microstructure and the mechanical properties of sinters produced from iron-based powders by diffusion-alloying sintering has been studied. Two methods of carbon introduction were tested: (1) Premixing of the base powder with graphite, and (2) Coating of the base powder with a carbon-containing ...
Published in Journal of Nanoparticle Research
As a substitute for pure silver nanoparticles, Cu-Ag core-shell nanoparticles (CS NPs) have received significant attention in the fields of electronic packaging and conductive inks. Shell thickness is one of the important factors affecting the sintering performance of CS NPs. In this work, we conduct a multi-particle molecular dynamics simulation t...
Published in International Journal of Automotive Technology
The increasingly stringent emission limits require high performances also at high mileage, increasing the need for reliable catalysts characterization during their whole useful life. Thermal ageing is the main problem: high temperatures, variable environment and the presence of water lead to a progressive deactivation of the components. Due to the ...
Published in Bulletin of Volcanology
Understanding the processes that drive explosive-effusive transitions during large silicic eruptions is crucial to hazard mitigation. Conduit models usually treat magma ascent and degassing as a gradual, unidirectional progression from bubble nucleation through magmatic fragmentation. However, there is growing evidence for the importance of bi-dire...
status: Published online
Abstract Zinc ferrite (ZnFe2O4) nanoparticles have attracted the attention of researchers because of their unique chemical properties and particle-size-dependent magnetic properties. High-surface-area spinel ferrites have numerous technical applications in areas such as high-density information storage, ferrofluids, and catalysis. The coprecipitati...
Sintering is a key step in the processing of high performance ceramics. Both the density and the grain size play a crucial role on the ceramic sintering kinetics and the final material properties. The master sintering curve (MSC) is a well-known tool for exploring sintering models kinetics. However, the conventional MSC theory assumes a unique sint...
The Fe-based Ti+Ni3Al+Al2O3 powder mixture is mechanically alloyed in a Spex ball mill. Composites with Fe-based Ti+Ni3Al+Al2O3 addition were produced at 1000 °C sintering temperature for 1 h sintering time. The metallurgical properties of these composites were examined by scanning electron microscopy (SEM), optical microscopy (OM), energy dispersi...
Le domaine de composition Ca(ZrxTi1-x)O3 a été étudié afin de mieux apprécier ses propriétés diélectriques ; dans le but d'applications pour condensateurs céramiques multicouches à armatures en métaux non nobles. La synthèse de tout ce domaine est mal connue, que ce soit par voie solide, ou par flash combustion. L’étude et l’optimisation (mélangeag...
