Articles

All articles  |  Recent articles

Electrical and Thermal Properties of Ti₃AlC₂ at High Temperature

X.-K. Qian¹, Y.-B. Li², X.-D. He², Y.-X. Chen¹, S.-N. Yun¹

¹ School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, P.R. China
² Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P.R. China

received April 20, 2011, received in revised form May 27, 2011, accepted June 7, 2011

Vol. 2, No. 3, Pages 155-158   DOI: 10.4416/JCST2011-00018

Abstract

In this paper, we report on the electrical and thermal properties of predominantly single-phase Ti₃AlC₂ ceramics (96.7 wt%) as a function of temperature. The results show that Ti₃AlC₂ is a good electrical and thermal conductor at high temperature. From 300 to 1173 K, the electrical resistivity of Ti₃AlC₂ increases linearly from 3.4 × 10^-5 to which indicates that Ti₃AlC₂ ceramic is a metallic conductor. In the 473 to 1473 K temperature range, the coefficient of thermal expansion of Ti₃AlC₂ yields an average value of 9.3 × 10^-6 K^-1, which is comparable with the coefficients of Ti₂AlC and Ti₃SiC₂. The thermal conductivity increases from 22.6 to 26.4 W·m^-1·K^-1 with rising temperature from 473 to 1473 K. It is found that the electronic contribution to the thermal conductivity is the dominant mechanism. The molar heat capacity of Ti₃AlC₂ is 138.6 J·mol^-1·K^-1 at 473 K and extrapolates to 168.5 J·mol^-1·K^-1 at 1473 K.

Keywords

Ceramics, thermal conductivity, thermal expansion, electrical properties

References

¹ Barsoum, M.W.: The M_N+1AX_N phases: A new class of solids; thermodynamically stable nanolaminates, Prog. Solid State Ch., 28, 201 – 281, (2000).

² Tzenov, N.V., Barsoum, M.W.: Synthesis and characterization of Ti₃AlC₂, J. Am. Ceram. Soc., 83, 825 – 832, (2000).

³ Lin, Z.J., Zhuo, M.J., Zhou, Y.C., Li, M.S., Wang, J.Y.: Microstructural characterization of layered ternary Ti₂AlC, Acta Mater., 54, 1009 – 1015, (2006).

⁴ Yeh, C.L., Kuo, C.W., Chu, Y.C.: Formation of Ti₃AlC₂/Al₂O₃ and Ti₂AlC/Al₂O₃ composites by combustion synthesis in Ti-A-C-TiO₂ systems, J. Alloy Compd., 494, 132 – 136, (2010).

⁵ Wang, X.H., Zhou, Y.C.: Oxidation behavior of Ti₃AlC₂ at 1000 – 1400 °C in air, Corros. Sci., 45, 891 – 907, (2003).

⁶ Qian, X.K., Li, Y.B., Sun, Y., He, X.D., Zhu, C.C.: Cyclic oxidation behavior of TiC/Ti₃AlC₂ composites at 550 – 950 °C in air, J. Alloy Compd., 491, 386 – 390, (2010).

⁷ Lin, Z.J., Zhuo, M.J., Zhou, Y.C., Li, M.S., Wang, J.Y.: Interfacial microstructure of Ti₃AlC₂ and Al₂O₃ oxide scale, Scripta Mater., 54, 1815 – 1820, (2006).

⁸ Qian, X.K., He, X.D., Li, Y.B., Li, H., Xu, D.L.: Cyclic oxidation of Ti₃AlC₂ at 1000 – 1300 °C in air, Corros. Sci., 53, 290 – 295, (2011).

⁹ Lopacinski, M., Puszynski, J., Lis, J.: Synthesis of ternary titanium aluminum carbides using self-propagating high-temperature synthesis technique, J. Am. Ceram. Soc., 84, 3051 – 3053, (2001).

¹⁰ Zhu, C.C., Qian, X.K., He, X.D., Xian, H.Z.: Combustion synthesis and thermal stability of Ti₃AlC₂, Rare Metal Mat. Eng., 38, 86 – 89, (2009).

¹¹ Wang, X.H., Zhou, Y.C.: Solid-liquid reaction synthesis of layered machinable Ti₃AlC₂ ceramic, J. Mater. Chem., 12, 455 – 460, (2002).

¹² Bao, Y.W., Wang, X.H., Zhang, H.B., Zhou, Y.C.: Thermal shock behavior of Ti₃AlC₂ from between 200 °C and 1300 °C, J. Eur. Ceram. Soc., 25, 3367 – 3374, (2005).

¹³ Wang, X.H., Zhou, Y.C.: Microstructure and properties of Ti₃AlC₂ prepared by the solid-liquid reaction synthesis and simultaneous in-situ hot pressing process, Acta Mater., 50, 3141 – 3149, (2002).

¹⁴ Ho, J.C., Hamdeh, H.H., Barsoum, M.W., El-Raghy, T.: Low-temperature heat capacities of Ti₃Al_1.1C_1.8, Ti₄AlN₃, and Ti₃SiC₂, J. Appl. Phys., 86, 3609, (1999).

¹⁵ Wang, C.A., Zhou, A.G., Qi, L., Huang, Y.: Quantitative phase analysis in the ti-al-c ternary system by x-ray diffraction, Powder Diffr., 20, 218 – 223, (2005).

¹⁶ Barsoum, M.W., Salama, I., El-Raghy, T., Golczewski, J., Porter, W.D., Wang, H., Seifert, H.J., Aldinger, F.: Thermal and electrical properties of Nb₂AlC, (Ti, Nb)₂AlC and Ti₂AlC, Metall. Mater. Trans. A., 33, 2775 – 2779, (2002).

¹⁷ Barsoum, M.W., El-Raghy, T.: Synthesis and characterization of a remarkable ceramic: Ti₃SiC₂, J. Am. Ceram. Soc., 79, 1953 – 1956, (1996).

¹⁸ Barsoum, M.W., El-Raghy, T., Rawn, C.J., Porter, W.D., Wang, H., Payzant, E.A., Hubbard, C.R.: Thermal properties of Ti₃SiC₂, J. Phys. Chem. Solids, 60, 429 – 439, (1999).

¹⁹ Barsoum, M.W., Golczewski, J., Seifert, H.J., Aldinger, F.: Fabrication and electrical and thermal properties of Ti₂InC, Hf₂InC and (Ti,Hf)₂InC, J. Alloy. Compd., 340, 173 – 179, (2002).

Copyright

Göller Verlag GmbH