Laser powder bed fusion (L-PBF) and characterization of Ni-based superalloys with combined precipitation- and oxide-dispersion-strengthening (US-Swiss collaboration project, funded by the US Army Research Office ARO): L-PBF consolidation and parameter survey of a model Ni alloy and ODS variations. Identification of critical material changes induced by the added oxides. HRSTEM, Hardness, Material TestingDevelopment of high-strength Al alloy for additive manufacturing (Andromeda project… Show more Laser powder bed fusion (L-PBF) and characterization of Ni-based superalloys with combined precipitation- and oxide-dispersion-strengthening (US-Swiss collaboration project, funded by the US Army Research Office ARO): L-PBF consolidation and parameter survey of a model Ni alloy and ODS variations. Identification of critical material changes induced by the added oxides. HRSTEM, Hardness, Material TestingDevelopment of high-strength Al alloy for additive manufacturing (Andromeda project, Funded by Innosuisse): Design of Al alloy and heat treatment strategy; In-depth microstructural characterization and material testing.Fabrication of High Entropy Alloys (HEA) by arc melting. Microstrucural characterization and heat treatment.Crack-free consolidation of H13 Steel on production-scaled L-PBF machine. Large-scale design of experiment (DOE) investigation, combined with characterization methods, to identify the key parameters influencing material failure during consolidation. Show less

Engineering of aluminum super alloy for high temperatures applications (Ford Motor Company - Northwestern University alliance, funded by Ford).Modification of an expensive Sc-rich Al-Sc-Zr-Er-Si alloy, strengthened by L12 nanopre-cipitates, to a Zr-rich Al-Zr-Sc-Er-Si alloy, with improved coarsening resistance and strength at HT, at a fraction of the material cost. In depth material characterization

Thesis: “Atomic redistribution of metallic contaminants at interfaces of CMOS devices” in the frame of the COMET project.Investigated the atomic segregation of multiple contaminants (Fe, Ni, Mo, W, Au) by APT and HRTEM at the Si/SiO2 interface. Identification of precipitating phases, and their crystallographic relationship with the matrix.Identified the atypical diffusion mechanism of W in silicon, and the coherent precipitation of WSi2 and W5Si3 precipitates at the Si/SiO2… Show more Thesis: “Atomic redistribution of metallic contaminants at interfaces of CMOS devices” in the frame of the COMET project.Investigated the atomic segregation of multiple contaminants (Fe, Ni, Mo, W, Au) by APT and HRTEM at the Si/SiO2 interface. Identification of precipitating phases, and their crystallographic relationship with the matrix.Identified the atypical diffusion mechanism of W in silicon, and the coherent precipitation of WSi2 and W5Si3 precipitates at the Si/SiO2 interface.Elucidated the "pyramid structural defects" origin in Fe-contaminated Si wafers, which remained unclear since the 1990s.Developed a sample holder, which allows sequential TEM and APT analysis on the same sample. Developed an APT sample preparation method to study oxide/matrix interfaces, with improved analysis yield and reduced distortions. Show less

Controlled growth of titanium oxide layer by thermal oxidation process. Characterization of the oxide layer and searching for etching methods.

Internship revolving around a piece of equipment used in Failure Analysis: the Atomic Force Prober (Multiprobe).Topic 1: Carry out research and tests for prober on metalTopic 2: Setting up automated electrical test programs

Correct and update STMicroelectronics FMEAs file (Failure Mode and Effect Analysis) . Communication with every teams and division of the company to understand process changes of the last few years and assess their impacts.