Speaker
Description
Metallic glasses (MG) are a kind of metallic materials recently developed which present attractive mechanical properties and corrosion resistance, thanks to an amorphous atomic structure. The on-going development of powder additive manufacturing techniques offers the opportunity to produce rather large parts (bulk metallic glasses), which make them a good option for durable orthopedic implants.
In this presentation, we will present a 3D printing process that consists of extruding a paste filled with metallic particles, debinding the organic components of the paste and pressureless sintering the final structures. The study mainly focuses on optimizing the debinding and sintering of the scaffold after 3D printing.
Here, we propose to study the liquid sintering of a blend composed of MG powder particles and additive metal powders which have a melting point lower than the crystallization temperature of the MG. In order to study in details the phase transformation, the crystallization kinetics and the sintering, different systems composed of biocompatible MG powder (such as Zr-based MG with Tcr > 470°C) and low melting point metals (Zn, Zn alloys, …) have been studied combining post-mortem characterization (SEM, EDX, EBSD, XRD, …) with in situ characterizations of metal/MG interfaces using environmental SEM). Characterizations of the 3D printed MG materials will also be presented. The results of this study will permit to define the best system MG/additive metal and develop designed MG architectured structures by 3D printing.
| Speaker Country | France |
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