Abstract
Ti3SiC2 / 3Y-TZP ͑3 mol % Yttria-stabilized zirconia͒ composites were prepared by spark plasma
sintering. The effective dc conductivities of the composites have been measured and the percolation
threshold was determined. The dielectric behavior of the composites was studied in the frequency
range 102 – 4 ϫ 107 Hz. The results show that the dielectric constant increased remarkably with the
Ti3SiC2 concentration, when the Ti3SiC2 concentration was close to percolation threshold. This may
be attributed to the critical behavior of the dielectric constant near the percolation threshold as well
as to the polarization effects between the clusters inside the composites. © 2005 American Institute
of Physics.
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