Microstructural analysis of novel preceramic paper-derived sicf /sic composites

Li K, Kashkarov E, Ma H, Fan P, Zhang Q, Zhang P, Zhang J, Wu Z, Wahl L, Laptev R, Lider A, Travitzky N, Yuan D (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Materials MDPI

Book Volume: 14

Article Number: 6737

Journal Issue: 22

DOI: 10.3390/ma14226737

Abstract

This paper presents the results of microstructural analysis of novel preceramic paper-derived SiCf/SiC composites fabricated by spark plasma sintering. The sintering temperature and pressure were 2100/2200◦ C and 60/100 MPa, respectively. The content of fibers in the composites was approx. 10 wt %. The SiCf /SiC composites were analyzed by positron annihilation methods, X-ray diffraction technology, scanning electron microscopy, and Raman spectroscopy. Longer sintering time causes the proportion of the 6H-SiC composition to increase to ~80%. The increase in sintering temperature from 2100◦ C to 2200◦ C leads to partial transition of 4H-SiC to 6H-SiC during the sintering process, and the long-life component of positrons indicates the formation of Si vacancies. The Raman characteristic peaks of turbostratic graphite appear in the Raman spectrum of SiC fibers, this is caused by the diffusion of carbon from the surface of the SiC fiber and the preceramic paper during the high-temperature sintering process.

Authors with CRIS profile

Larissa Wahl Technische Fakultät Nahum Travitzky Lehrstuhl für Glas und Keramik

Involved external institutions

China Institute of Atomic Energy (CIAE) / 中国原子能科学研究院 CN China (CN) Tomsk Polytechnic University (TPU) / Томский политехнический университет RU Russian Federation (RU) Institute of High Energy Physics (IHEP) / 中国科学院高能物理研究所 CN China (CN) State Nuclear Security Technology Center CN China (CN)

How to cite

APA:

Li, K., Kashkarov, E., Ma, H., Fan, P., Zhang, Q., Zhang, P.,... Yuan, D. (2021). Microstructural analysis of novel preceramic paper-derived sicf /sic composites. Materials, 14(22). https://doi.org/10.3390/ma14226737

MLA:

Li, Ke, et al. "Microstructural analysis of novel preceramic paper-derived sicf /sic composites." Materials 14.22 (2021).

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