@article{CHEN2024, 
author = {Bo CHEN and Bo DONG and Chengji DENG and Qiliang ZOU and Jun DING and Wanzheng ZHU and Qian WANG and Yong ZHANG and Hongxi ZHU and Chao YU},
title = {Preparation and Mechanical Properties of Mullite-Ti(C,N) Composites},
year = {2024},
journal = {Journal of Ceramics},
volume = {45},
number = {1},
pages = {133-138},
keywords = {Ti(C,N), carbothermal reduction nitridation, mullite, microstructure, mechanical properties},
url = {https://www.sciopen.com/article/10.13957/j.cnki.tcxb.2024.01.013},
doi = {10.13957/j.cnki.tcxb.2024.01.013},
abstract = {Mullite-Ti(C,N) composites were synthesized using TiO2, graphite and Al/Si/Al2O3 composite powders as precursors. The samples were subjected to a carbothermal reduction nitridation process at temperatures ranging from 1400 to 1600 ℃ in nitrogen atmosphere for 2 h. The effects of firing temperature on phase composition, microstructure and mechanical properties of the composites were studied. According to X-ray diffraction results, after heat treatment at 1400 ℃, the samples consisted of Ti(C,N), SiO2 and cristobalite. With increasing firing temperature to 1450–1600 ℃, cristobalite phase disappeared, while short columnar mullite phase is present, which is intimately bonded to amorphous SiO2, resulting in effective chemical bonding. Furthermore, at 1500 ℃, microstructure and mechanical properties of the composites were significantly improved, including a reduction in the number of open pores and an enhancement in particle bonding. The optimized sample had bulk density, elastic modulus, flexural strength and Vickers hardness to be (3.48±0.02) g·cm−3, (138.5±0.1) GPa, (158.0±0.03) MPa and (21.01±0.01) GPa, respectively.}
}