Mechanical and Thermophysical Properties of Zr-Al-Si-C Ceramics

• Published in: Journal of the American Ceramic Society Vol. 92; no. 2; pp. 445 - 451
• Main Authors: He, Ling-Feng, Bao, Yi-Wang, Wang, Jing-Yang, Li, Mei-Shuan, Zhou, Yan-Chun
• Format: Journal Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.02.2009; Wiley Subscription Services, Inc
• Subjects: Carbides; Ceramics; Crystal structure; Materials science; Zirconium
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2008.02879.x

The mechanical and thermophysical properties of quaternary‐layered carbides, Zr2[Al(Si)]4C5 and Zr3[Al(Si)]4C6 have been investigated and compared with those of Zr2Al3C4 and Zr3Al3C5. These four carbides are generally alike in mechanical and thermophysical properties due to their similar crystal structures that consisting of alternatively stacked ZrC layers and Al3C2/[Al(Si)]4C3 slabs. The layer thickness of zirconium carbide and aluminum carbide has effects on their properties. Thicker layer of zirconium carbide and/or thinner layer of aluminum carbides are in favor of stiffness, hardness, thermal, and electrical conductivities, but go against density, specific stiffness, Debye temperature, and coefficient of thermal expansion.