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https://www.ias.ac.in/article/fulltext/boms/032/04/0393-0399

Infiltration; thermal expansion; compressive stress; strength; thermal shock; ZTA.

This work studies the effect on the mechanical properties of alumina-10 wt% zirconia (3 mol% yttria stabilized) composite by infiltrating glass of a higher thermal expansion (soda lime glass) on the surface at high temperature. The glass improved the strength of composite at room temperature as well as at high temperature. This could be attributed to the drastic drop in the coefficient of thermal expansion due to the compositional change in the soda lime glass during infiltration. There was a significant improvement in the Weibull modulus after glass infiltration. Glass infiltrated samples showed better thermal shock resistance. The magnitude of strength increment was found to be in the order of the surface residual stress generated by thermo-elastic properties mismatch between the composite and the penetrated glass.

A Balakrishnan¹ B B Panigrahi² K P Sanosh¹ Min-Cheol Chu² T N Kim¹ Seong-Jai Cho²

1. Department of Information and Electronic Materials Engineering, College of Engineering, Paichai University, Daejeon 302-735, Republic of Korea
2. Division of Metrology for Emerging Technology, Korea Research Institute of Standards and Science, 1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, Republic of Korea

Published

August 2009

Manuscript received

27 July 2008

Manuscript revised

28 August 2008