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High-Temperature Mechanical Properties of Al2O3/Ti3SiC2 Multilayer Ceramics

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Abstract:

The high-temperature mechanical properties were very important to structural materials, especially structural ceramics. Hence, the strength, elastic modulus, stress relaxation and creep behavior of the multilayer materials at elevated temperature were studied in this paper. According to the curves of mechanical properties varieties with temperature risen from room-temperature to 1300°C, the multilayer materials could remain relatively high mechanical properties until 1150°C. Otherwise, the creep function of the multilayer composites was also determined, in which the stress exponent was 1.4 and activation energy was 204kJ/mol. By contrasting to the monolithic ceramics of Al2O3 and Ti3SiC2, the main creep mechanisms include: interface diffusion creep (in Al2O3 layers), dislocation movement creep, grain delamination and sliding (in Ti3SiC2 layers).

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

1877-1880

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.1877

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Online since:

February 2007

Authors:

Qing Feng Zan, Chang An Wang, Li Min Dong, Yong Huang

Keywords:

Al2O3, High-Temperature, Mechanical Property, Multilayer, Ti3SiC2

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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