Percorrer por autor "Levy, Gideon"
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- Biomedical production of implants by additive electro-chemical and physical processesPublication . Bartolo, Paulo; Kruth, Jean-Pierre; Silva, Jorge; Levy, Gideon; Malshe, Ajay; Rajurkar, Kamlakar; Mitsuishi, Mamoru; Ciurana, Joaquim; Leu, MingBiomanufacturing integrates life science and engineering fundamentals to produce biocompatible products enhancing the quality of life. The state-of-the-art of this rapidly evolving manufacturing sector is presented and discussed, in particular the additive electrical, chemical and physical processes currently being applied to produce synthetic and biological parts. This fabrication strategy is strongly materialdependent, so the main classes of biomaterials are detailed. It is explained the potential to process composite materials combining synthetic and biological materials, such as cells, proteins and growth factors, as well the interdependences between materials and processes. The techniques commonly used to increase the bioactivity of clinical implants and improve the interface characteristics between biological tissues and implants are also presented.
- Turbomachinery component manufacture by application of electrochemical, electro-physical and photonic processesPublication . Klocke, Fritz; Klink, Andreas; Veselovac, Drazen; Aspinwall, David Keith; Soo, Sein Leung; Schmidt, Michael; Schilp, Johannes; Levy, Gideon; Kruth, Jean-PierreThis paper presents an overview of the current technological and economical capabilities of electrochemical (ECM-based), electro-physical (EDM-based) and photonic (Laser-/EBM-based) additive and removal processes for turbomachinery component manufacture. Starting with the industrial demands and challenges of today, the technologies are reviewed in detail regarding achievable geometrical precision and surface integrity as well as material removal and deposition rates for conventionally difficult-to-cut Ti- and Ni-based alloys and dedicated steels. Past, existing and future areas of technology application of these advanced non-mechanical manufacturing processes are discussed. The paper focusses on the description of shaping processes therefore excludes pure welding or coating applications.