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DOI: 10.4028/

Process Development for the Ceramic Injection Molding of Oxide Chopped Fiber Reinforced Aluminum Oxide

Tülümen, Metin; Hanemann, Thomas; Hoffmann, Michael J.; Oberacker, Rainer; Piotter, Volker

Abstract (englisch):
In this study, it was tried to develop a process chain for ceramic injection molding of Al2O3-chopped-fiber reinforced oxide-ceramic-matrix-composite. The feedstocks are compounded at 50 Vol. % filling degree of solid (Al2O3 μ-powder (Taimei Chemicals Co. Ltd.) and 3,2 mm chopped fibers (3M)), in which fiber content varies from 0 Vol. % to 100 Vol. %. As binder system, PE + Paraffin Wax + Stearic Acid are used. The ingredients are compounded in a kneader (Brabender) at 125°C and after the viscosity measurement in the high pressure capillary rheometer at 160°C and certain shear rates, the feedstock is injection molded (Battenfeld) at 160°C, which is followed by debinding process, including chemical (in n-Hexane) and thermal steps, and 2h sintering at different temperatures. Flow paths in the machinery parts, rheological properties of binding system, fiber content and the fiber orientation have significant effect on the flow behavior of the feedstock, fiber -orientation, -distribution & -length, which are crucial to understand the properties of end-parts like mechanical reinforcement of the fibers. The fibers in the sintered parts ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0252-1059, 1013-9826, 1662-9795
KITopen ID: 1000073792
HGF-Programm 49.01.08; LK 01
Erschienen in Key engineering materials
Band 742
Seiten 231-237
Bemerkung zur Veröffentlichung 21st Symposium on Composites, 2017, Bremen, Germany, 5.-7. July 2017
Schlagworte Ceramic Matrix Composite (CMC), Fiber Orientation, Micro Injection Molding, Oxide Ceramics, Oxide Fibers, Sintering
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