C32 Powder Processing to Controlled Microstructure and Near Net Complex Shape

No. Symposium Organiser Co-Organiser
C32 Powder Processing to Controlled Microstructure and Near Net Complex Shape Omer Van der Biest
Physical Metallurgy and Materials Engineering Section
Department MTM
K. U. Leuven (Belgium)omer.vanderbiest@mtm.kuleuven.ac.be (omer NULL.vanderbiest null@null mtm NULL.kuleuven NULL.ac NULL.be)
Christophe Martin
Laboratoire SIMAP
St Martin d’Hères, France
christophe.martin@grenoble-inp.fr (christophe NULL.martin null@null grenoble-inp NULL.fr)
Lars Nyborg
Department of Materials and Manufacturing Technology
Chalmers University,
Goteborg (Sweden)
 lars.nyborg@chalmers.se (lars NULL.nyborg null@null chalmers NULL.se)
The properties of a material obtained by powders depend on both porosity and the matrix microstructure.

Depending on the final product, porosity may be either the dominating functional characteristic to be tailored to the specific application (filters, biomedical parts, heating systems, …) or a “defect” to be controlled, minimized, completely eliminated (structural parts, magnets, …). On the other side, Nano- and Ultra Fine Grained materials, Functionally Graded Materials, composite materials, multiphase materials are examples of modern materials that can be produced by a powder technology route having a wide range of properties strongly dependent on the structure formed during the consolidation process. Processing technologies are continuously developing to tailor porosity and matrix microstructure to the specific applications. More generally, the reduction or elimination of machining after sintering brought by powder technology technologies ensures cost, energy and raw material saving.  

These themes will be developed by focusing attention on:

- the influence of the material and processing variables on the residual porosity and on the microstructure and, in turn, on the properties of sintered materials;

- the experimental methods to characterize pores size, shape, interconnection, distribution;

- the new processing technologies (as SPS) to obtain highly porous materials, full-density materials, nano and UFG materials, FGM;

- the control of grain growth on sintering of nanostructured powders, and on the thermomechanical stresses on sintering of FGM;

- the methods to obtain the proper distribution of the second phase in the composite matrix, with special focus on in-situ formation, and the resulting properties;

- the methods (as co-PIM just as one example) to obtain a multiphase material with the proper control of the amount, distribution and size of the different constituents, and the resulting properties.

- the progress in the dimensional control in the mature technologies (press-and-sinter, PIM, sinterforging, …);

- the new technologies (Laser Sintering, SLM, E-beam sintering and melting, …) which allow products with even more complex shape to be manufactured;

Contributions dealing with the theoretical background (including modeling) as well as with the technological (including design and quality control) issues have also been included.