Effect of SiC Fiber Content in Silicon Carbide Material
on Its Mechanical Properties
S. N. Perevislova, *, T. L. Apukhtinab, A. S. Lysenkovc, M. G. Frolovac, and M. V. Tomkovichd
a Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, 199034 Russia
b Research Institute of Chemistry and Technology of Organoelement Compounds, Moscow, 105118 Russia
c Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 119334 Russia
d Ioffe Institute, St. Petersburg, 194021 Russia
Correspondence to: *e-mail: perevislov@mail.ru
Received 26 July, 2021
Abstract—SiC materials are obtained by impregnating a porous workpiece consisting of silicon carbide and carbon with liquid silicon. In the composition of the material, at the stage of preparation of charge compositions, up to 18 vol % SiCf is introduced, reinforcing the material and giving it a high level of mechanical characteristics. With an increase in the fiber content (>10 vol % SiCf), the density decreases and the strength of the material decreases; nevertheless, its crack resistance increases. The maximum value of the critical stress intensity factor is recorded for a material containing 15 vol % SiCf–K1C = 6.0 ± 0.2 MPa m1/2
Keywords: silicon carbide, fibers, reinforcement, mechanical characteristics, crack resistance
DOI: 10.1134/S1087659622010102