Publications de Luciano Borasi

On the slip burst amplitude cutoff in dislocation-rich microcrystals

The plastic deformation of small-scale face-centered cubic metals exhibits intermittent slip burst events that appear on stress-strain curves as sudden strain jumps and/or load drops. These events are generally attributed to the avalanche-like cooperative ...

Pergamon-Elsevier Science Ltd2023

Bringing casting to microfabrication: processing and deformation of microcastings

Luciano Borasi

This work extends the range of pathways for the production of metallic microcomponents by downscaling metal casting. This is accomplished by using either of two different molding techniques, namely femtosecond laser micromachining or lithographic silicon m ...

EPFL2023

Intermittent tensile deformation of silver microcastings: Influence of the strain rate

Andreas Mortensen, Luciano Borasi

We compare the uniaxial tensile behavior of mu m-scale cast silver tensile specimens at strain rates of 10(-3 )s(-1) and 2 s(-1) to find no major impact of the strain rate on either of the flow stress, work hardening, or strain to fracture. Plastic deforma ...

Pergamon-Elsevier Science Ltd2023

The effect of size, orientation and temperature on the deformation of microcast silver crystals

Edoardo Charbon, Andreas Mortensen, Simone Frasca, Luciano Borasi

Monocrystalline microwires of silver are produced by means of a novel casting process that combines precise mold production by silicon microfabrication with molten metal pressure infiltration. The wires have a shape amenable to tensile testing and a diamet ...

PERGAMON-ELSEVIER SCIENCE LTD2023

Glass-in-glass infiltration for 3D micro-optical composite components

Andreas Mortensen, Yves Bellouard, Jérôme Faist, Gözden Torun, Enrico Casamenti, Luciano Borasi, Mathieu Bertrand

Chalcogenide glass exhibits a wide transmission window in the infrared range, a high refractive index, and nonlinear optical properties; however, due to its poor mechanical properties and low chemical and environmental stability, producing three-dimensiona ...

2022

Coupling silicon lithography with metal casting

Edoardo Charbon, Andreas Mortensen, Simone Frasca, Luciano Borasi

Micron-scale shaped 2D or 2.5D structures made of silver or copper can be produced by combining silicon photolithographic etching with metal casting by pressure infiltration. This combination of two classical pro-cesses, one from semiconductor fabrication ...

2022

3D metal freeform micromanufacturing

Andreas Mortensen, Yves Bellouard, Raphaël Charvet, Fatmah Ebrahim, Cyril Dénéréaz, Léa Deillon, Tao Yang, Enrico Casamenti, Luciano Borasi, Sacha Jérémy Florentin Pollonghini

Despite remarkable progress made in recent years, producing freeform three-dimensional micro-components out of copper, silver or gold and their alloys remains an engineering challenge: current processes are either too slow to be economically viable, or pro ...

2021