@article{Zhang2024, 
author = {Weiwei Zhang and Shibo Li and Shukai Fan and Xuejin Zhang and Xiachen Fan and Guoping Bei},
title = {Ti3AlC2−yNy carbonitride MAX phase solid solutions with tunable mechanical, thermal, and electrical properties},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {9},
pages = {1473-1481},
keywords = {MAX solid solutions, Ti3AlC2−yNy, microstructure, mechanical properties, electrical conductivity, thermal expansion},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220951},
doi = {10.26599/JAC.2024.9220951},
abstract = {Changing the N content in the Ti3AlC2−yNy MAX phase solid solutions allows for the fine-tuning of their properties. However, systematic studies on the synthesis and properties of Ti3AlC2−yNy solid solution bulks have not been reported thus far. Here, previously reported Ti3AlC2−yNy solid solution bulks (y = 0.3, 0.5, 0.8, and 1.0) were synthesized via hot pressing of their powder counterparts under optimized conditions. The prepared Ti3AlC2−yNy bulks are dense and have a fine microstructure with grain sizes of 6–8 μm. The influence of the N content on the mechanical properties, electrical conductivities, and coefficients of thermal expansion (CTEs) of the prepared Ti3AlC2−yNy bulk materials was clarified. The flexural strength and Vickers hardness values increased with increasing N content, suggesting that solid solution strengthening effectively improved the mechanical properties of Ti3AlC2−yNy. Ti3AlCN (y = 1) had the highest Vickers hardness and flexural strength among the studied samples, reaching 5.54 GPa and 550 MPa, respectively. However, the electrical conductivity and CTEs of the Ti3AlC2−yNy solid solutions decreased with increasing N content, from 8.93×10−6 to 7.69×10−6 K−1 and from 1.33×106 to 0.95×106 S/m, respectively. This work demonstrated the tunable properties of Ti3AlC2−yNy solid solutions with varying N contents and widened the MAX phase family for fundamental studies and applications.}
}