Zeng Delu, Xiao Lairong, Xu Shaofu, Yu Huali, Zhang Yu, Yu Chenxu, Zhao Xiaojun, Cai Zhenyang, Li Wei
School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Key Laboratory of Non-Ferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China.
Materials (Basel). 2023 Aug 15;16(16):5637. doi: 10.3390/ma16165637.
//Nb and α-NbSi phases were detected. Meanwhile, NbC was observed, and the crystal forms of NbSi changed in the C-doped composites. Furthermore, micron-sized and nano-sized NbC particles were found in the Nb layer. The orientation relationship of NbC phase and the surrounding Nb was [001]//[010], (200) //(101) . Additionally, with the addition of C, the compressive strength of the composites, at 1400 °C, and the fracture toughness increased from 310 MPa and 11.9 MPa·m to 330 MPa and 14.2 MPa·m, respectively; the addition of C mainly resulted in solid solution strengthening.
