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Oxidation resistance and thermal stability of the SiC‐ZrB 2 composite ceramic fibers
Author(s) -
Zhang Hao,
Ge Min,
Zhang Huifeng,
Kong Weijia,
Yu Shouquan,
Zhang Weigang
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17554
Subject(s) - materials science , composite material , ceramic , ultimate tensile strength , crystallite , composite number , sintering , thermal stability , creep , grain size , modulus , elastic modulus , metallurgy , chemical engineering , engineering
In this study, continuous SiC‐ZrB 2 composite ceramic fibers were synthesized from a novel pre‐ceramic polymer of polyzirconocenecarbosilane (PZCS) via melt spinning, electron beam cross‐linking, pyrolysis, and finally sintering at 1800°C under argon. The ZrB 2 particles with an average grain size of 30.7 nm were found to be uniformly dispersed in the SiC with a mean size of 59.7 nm, as calculated using the Scherrer equation. The polycrystalline fibers exhibit dense morphologies without any obvious holes or cracks. The tensile strength of the fibers was greater than 2.0 GPa, and their elastic modulus was ~380 GPa. After oxidation at 1200°C for 1 hour, the strength of the fibers did not decrease despite a small loss of elastic modulus. Compared to the advanced commercial SiC fibers of Tyranno SA, the fibers exhibited improved high‐temperature creep resistance in the temperature range 1300‐1500°C.