Rapid Prototyping of Complex-Shaped Parts of Si/SiC-Ceramics by Laser Sintering
- Prof. Dr. G. Müller
Published Online: 27 APR 2006
Copyright © 2000 Wiley-VCH Verlag GmbH
Ceramics - Processing, Reliability, Tribology and Wear, Volume 12
How to Cite
Löschau, W. and Lenk, R. (2000) Rapid Prototyping of Complex-Shaped Parts of Si/SiC-Ceramics by Laser Sintering, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch24
Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany
- Published Online: 27 APR 2006
- Published Print: 27 JUN 2000
Print ISBN: 9783527301942
Online ISBN: 9783527607297
- complex-shaped parts of Si/SiC-ceramics;
- laser sintering
Results are presented on generating very complex parts and tools with undercuts, thin walls and internal voids by layer-wise selective laser sintering of pure SiC-powder without additives. The sintered parts are then infiltrated with Si in a vacuum furnace without distortions. The sintering process is brought about by the transient formation of different Si-base phases and by partial disintegration and interlocking of the SiC grains. The final porosity of the Si/SiC-parts is below 1%. Their mechanical and thermal properties (as density, bending strength, Young's modulus, thermal conductivity, thermal expansion coefficient) can be controlled via Si content. They are slightly below those of conventional Si/SiC-ceramics.
It is expected that by means of this technique, rigid light-weight mirrors and wear and temperature resistant dies and tools, for example, can be generated.