TY - JOUR
T1 - Oxidation behavior of monolithic boron containing SiC/(Hf0.5Ti0.5)C/C composites consolidated by SPS
AU - Feldmann, Laura
AU - Zhang, Yuyu
AU - Zhang, Xuemeng
AU - Sun, Jia
AU - Riedel, Ralf
N1 - Publisher Copyright:
© 2025 The Authors
PY - 2025/12
Y1 - 2025/12
N2 - In the present study, the mechanical properties and the oxidation behavior of a SiC/(Hf0.5Ti0.5)C/C composite with and without boron addition are investigated. For the preparation of the monoliths, preceramic polymers are synthesized by single-source-precursor, and subsequently pyrolyzed. The resulting ceramic powders are consolidated by spark plasma sintering at 2200 °C to obtain dense pellets. The chemical modification of the single-source-precursor with a small amount of boron (about 0.16 wt%) leads to ceramic pellets with a more homogeneous microstructure. The hardness and the elastic modulus of dense SiC/(Hf0.5Ti0.5)C/C composites were found to be 27 and 336 GPa, respectively. The boron containing SiC/(Hf0.5Ti0.5)C/(B)C samples exhibited a hardness of 24 GPa and an elastic modulus of 299 GPa. Furthermore, the oxidation behavior was investigated via simultaneous thermal analysis up to 1500 °C for 20 h. The boron containing (Hf,Ti)C/SiC monoliths show about 20 % lower oxidation rates upon oxidation at 1400 °C.
AB - In the present study, the mechanical properties and the oxidation behavior of a SiC/(Hf0.5Ti0.5)C/C composite with and without boron addition are investigated. For the preparation of the monoliths, preceramic polymers are synthesized by single-source-precursor, and subsequently pyrolyzed. The resulting ceramic powders are consolidated by spark plasma sintering at 2200 °C to obtain dense pellets. The chemical modification of the single-source-precursor with a small amount of boron (about 0.16 wt%) leads to ceramic pellets with a more homogeneous microstructure. The hardness and the elastic modulus of dense SiC/(Hf0.5Ti0.5)C/C composites were found to be 27 and 336 GPa, respectively. The boron containing SiC/(Hf0.5Ti0.5)C/(B)C samples exhibited a hardness of 24 GPa and an elastic modulus of 299 GPa. Furthermore, the oxidation behavior was investigated via simultaneous thermal analysis up to 1500 °C for 20 h. The boron containing (Hf,Ti)C/SiC monoliths show about 20 % lower oxidation rates upon oxidation at 1400 °C.
KW - Oxidation
KW - SPS
KW - SiC-Based Composites
KW - Single-Source-Precursor
UR - https://www.scopus.com/pages/publications/105007356381
U2 - 10.1016/j.jeurceramsoc.2025.117607
DO - 10.1016/j.jeurceramsoc.2025.117607
M3 - 文章
AN - SCOPUS:105007356381
SN - 0955-2219
VL - 45
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 15
M1 - 117607
ER -