Process Chain Development for the Fabrication of Three-Dimensional Braided Oxide Ceramic Matrix Composites

Autor: Ben Vollbrecht, Thomas Gries, Georg Puchas, Niels Grigat, Martin Kolloch, Walter Krenkel
Rok vydání: 2021
Předmět:
Zdroj: Materials
Volume 14
Issue 21
Materials 14(21), 6338 (2021). doi:10.3390/ma14216338 special issue: "Special Issue "Novel Ceramic Materials for the Energy Transition" / Special Issue Editor: Prof. Dr. Jesus Gonzalez-Julian, Guest Editor"
Materials, Vol 14, Iss 6338, p 6338 (2021)
ISSN: 1996-1944
Popis: Fiber composites with a three-dimensional braided reinforcement architecture have higher fiber volume content and Z-fiber content compared to a two-dimensional braided reinforcement architecture
as a result, the shear strength increases. Porous oxide fiber composites (OFCs) have the inherent weakness of a low interlaminar shear strength, which can be specifically increased by the use of a three-dimensional fiber reinforcement. In this work, the braiding process chain for processing highly brittle oxide ceramic fibers is modified
as a consequence, a bobbin, which protects the filament, is developed and quantitatively evaluated on a test rig with regard to tension and filament breakage. Subsequently, a braiding process is designed which takes into account fiber-protecting aspects, and a three-dimensional reinforced demonstrator is produced and tested. After impregnation with an Al2O3-ZrO2 slurry, by either a prepreg process or a vacuum-assisted process, as well as subsequent sintering, the three-dimensional braid-reinforced OFC exhibits an interlaminar shear strength (ILSS) which is higher than that of two-dimensional braid- or fabric-reinforced samples by 64–95%. The influence of the manufacturing process on the relative macropore content is investigated and correlated with the mechanical properties.
Databáze: OpenAIRE
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