Powder Materials Committee

Technical Programming

2019 TMS Annual Meeting & Exhibition: Additive Manufacturing: Solid State Processing of Metals and Ceramics: Organized by James Paramore; Amy Elliott; Matthew Dunstan; Markus Chmielus; Nihan Tuncer

The most popular techniques for additive manufacturing (AM) of metals (e.g. powder bed fusion or directed energy deposition) utilize high-energy beams (e.g. lasers or electron beams) to directly fuse metal powders into bulk components. However, while these processes are promising for specific forms of production, they can be relatively expensive and energy-intensive. Furthermore, these processes result in complex thermal histories, which can produce large residual stresses along with difficult to predict and anisotropic microstructures and mechanical properties. As an alternative, a suite of non-fusion AM processes have been developed or are under development for the production of metal and ceramic components. In general, these processes use AM to produce “green” parts that are subsequently consolidated into bulk components using powder consolidation techniques, such as debinding and sintering. The most popular technique is binder jetting, during which a liquid binder is selectively deposited on a powder bed via inkjet printheads. Similar to powder injection molding, metal or ceramic powder can also be mixed with a polymer blend to produce pellets or filament that are formed into green parts via extrusion AM (e.g. fused filament fabrication). Additionally, powder can be mixed with a photopolymer resin to produce green parts via AM photopolymerization processes (e.g. stereolithography). Other techniques for producing green parts via AM exist. Such processes address the high capital and operating costs along with the residual stresses and microstructural concerns of fusion-based AM. Additionally, these processes could enable the development of mobile machines for in-field production of metal and ceramic components. Example topics for this symposium include, but are not limited to, binder/polymer/resin development, AM process design/modification/optimization, debinding, sintering, and characterization of both green parts and bulk components. Furthermore, presentations on both modeling and experimental efforts are encouraged.

2019 TMS Annual Meeting & Exhibition: Powder Processing of Bulk Nanostructured Materials: Organized by Zachary Cordero; Deliang Zhang; Brady Butler; Ma Qian

This symposium will cover recent advances in the powder-route synthesis of bulk nanostructured materials and nanocomposites. Talks are welcome on all aspects of the powder processing of nanostructured materials. Topics of special interest include the following: (1) powder synthesis methods: mechanical alloying and milling, rapid solidification, chemistry-based techniques, emerging powder synthesis methods (2) advanced powder forming methods: novel pressing techniques, binder jet 3Dprinting, laser/electron beam/plasma powder deposition processes, injection molding; (3) pressure-assisted consolidation techniques: spark plasma sintering, cold spray deposition, hot pressing, shock-wave consolidation; (4) pressureless densification techniques: liquid phase sintering, liquid metal infiltration, nanophase separation sintering, microwave sintering; (5) new and emerging powder metallurgy-based consolidation processes. We strongly encourage talks on structural evolution during these synthesis, forming, and densification operations.

2018 TMS Annual Meeting & Exhibition: Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals: Organized by Ma Qian; Zak Fang ; Bowen Li

In this proposed six-session symposium, papers addressing all aspects of powder metallurgy of light, reactive and other non-ferrous metals and their applications will be welcome. The following topics of the powder metallurgy of light, reactive and other non-ferrous metals are particularly welcome: (i) novel synthesis of powder materials; (ii) production and characterisation of spherical powders for additive manufacturing (AM) or 3D printing, (iii) new developments and understanding of powder consolidation (e.g. spark plasma sintering; microwave sintering; forging, extrusion, powder injection moulding, cold spray forming); (iv) additive manufacturing or 3D printing; (v) functionally graded materials and novel metal-ceramic or metal-polymer composites; (vi) novel applications of powder materials including loose powders, porous structures and fully consolidated products; (vii) advances in characterization of powder materials; and (viii) modelling and simulation of all aspects of the powder metallurgy of light, reactive and other non-ferrous metals.