The effect of carbon fiber length on the microstructure, selected mechanical, wear, and thermal conductivity of  C<sub><i>f</i></sub>/SiC composite fabricated via spark plasma sintering (SPS) method

Ghasemi, Arman; Ramazani, Mazaher; Bakhshi, Saeed Reza; Al-Khafaji, Ali Hussein Demin; Zahabi, Saeed; Estarki, Mohammad Reza Loghman; Zamani, Abbas; Ghasemi, Arman; Ramazani, Mazaher; Bakhshi, Saeed Reza; Al-Khafaji, Ali Hussein Demin; Zahabi, Saeed; Estarki, Mohammad Reza Loghman; Zamani, Abbas

doi:2023.60.4.732

J. Korean Ceram. Soc. > Volume 60(4); 2023 > Article

Original Article

Journal of the Korean Ceramic Society 2023;60(4): 732-745.
doi: https://doi.org/10.1007/s43207-023-00300-w

The effect of carbon fiber length on the microstructure, selected mechanical, wear, and thermal conductivity of C_f/SiC composite fabricated via spark plasma sintering (SPS) method

Arman Ghasemi¹, Mazaher Ramazani¹, Saeed Reza Bakhshi¹, Ali Hussein Demin Al-Khafaji², Saeed Zahabi¹, Mohammad Reza Loghman Estarki¹, Abbas Zamani¹

¹Department of Materials Engineering , Malek Ashtar University of Technology, Isfahan, Iran
²Department of Laboratories Techniques, Al-Mustaqbal University College, Babylon, Hillah, Iraq

Correspondence

Mazaher Ramazani ,Email: mazaher.ramazani@gmail.com
Mohammad Reza Loghman Estarki ,Email: mrlestarki@mut-es.ac.ir ; loghman57@gmail.com

Received: November 15, 2022; Revised: March 6, 2023 Accepted: March 25, 2023. Published online: April 19, 2023.

ABSTRACT

This research aims to fabricate and develop a composite brake disc made of carbon/silicon carbide. For this purpose, the first silicon carbide nanoparticles were ultrasonicated with alumina sintering aid and carbon fiber (between 10 and 20%) with different lengths of 3 mm, 10 mm, and 15 mm. Next, the final C_f/SiC composite bulk was made-up via the spark plasma sintering (SPS) method. After that, the effect of different lengths of carbon fi ber was explored on the porosity, coefficient of friction, fracture toughness, thermal conductivity, and microhardness of samples. The results showed that the density of sintered samples with a carbon fiber length of 10 mm was higher than that of samples with fiber lengths of 3 and 15 mm. Also, the hardness (25.79 GPa) and fracture toughness (5.72 MPa.m^1/2) of this sample were higher than those of the samples sintered with carbon fiber lengths of 3 and 15 mm. Further, this sample with the maximum density showed a coefficient of friction (COF) of 0.43. Since for aeroplane brake discs, the COF should be between 0.3 and 0.4, and the porosity of samples should range within 3–5%, the samples sintered with the carbon fiber length of 10 mm had the nearby features to the preferred air brake disc indices.

Key words: Carbon fiber · SiC · Composite · Wear · Thermal conductivity · Porosity