Abstract
The thermomechanical properties of carbon fiber reinforced silicon carbide ceramic matrix composites (Cf/SiC CMCs) were studied up to 2000 °C using high temperature in situ flexural testing in argon. The CMC specimens were fabricated using an ultrahigh concentration (66 vol%) aqueous slurry containing nano-sized silicon carbide powder. The SiC powder compacts were obtained by drying the slurry and were densified using the precursor impregnation and pyrolysis (PIP) method with field assisted sintering technology/spark plasma sintering (FAST/SPS). The high relative density of the SiC green body (77.6%) enabled densification within 2.5 days using four PIP cycles. In contrast, conventional PIP processes take over 7 days. The in situ flexural strength of the Cf/SiC CMC was 434 MPa at 1750 °C, which was 84% higher than the room temperature value. The value further increased to 542 MPa at 2000 °C. Possible mechanisms to explain the excellent strength of the CMC at elevated temperatures are discussed.
Recommended Citation
M. S. Park et al., "Cf/SiC Ceramic Matrix Composites With Extraordinary Thermomechanical Properties Up To 2000 °C," Nanomaterials, vol. 14, no. 1, article no. 72, MDPI, Jan 2024.
The definitive version is available at https://doi.org/10.3390/nano14010072
Department(s)
Materials Science and Engineering
Publication Status
Open Access
Keywords and Phrases
ceramic matrix composite (CMC); precursor impregnation and pyrolysis (PIP); silicon carbide (SiC); spark plasma sintering method (SPS)
International Standard Serial Number (ISSN)
2079-4991
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jan 2024
Comments
National Science Foundation, Grant CAP22000-000