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Spark Plasma Sintering of Yttria-Stabilized Zirconia/Titanium Nitride Composites

Published online by Cambridge University Press:  16 February 2015

Paulo S. M. Silva  and
Fabio C. Fonseca
Paulo S. M. Silva
Affiliation:
Nuclear and Energy Research Institute – IPEN, São Paulo, SP, 05508-000, Brazil.
Fabio C. Fonseca
Affiliation:
Nuclear and Energy Research Institute – IPEN, São Paulo, SP, 05508-000, Brazil.
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Abstract

Composites of 8 mol% yttria-stabilized zirconia (YSZ) and titanium nitride (TiN) were obtained by mechanical mixing of commercial powders. High-density samples of (1-x) YSZ / x TiN, with x = 0, 25, 50, and 75 wt.%, were obtained by spark plasma sintering (SPS) at 1450 °C for 5 min. Surface contamination with carbon from the SPS was eliminated by diamond sawing of parallel surfaces. X-rays diffraction analyses showed that samples are composed by a mixture of the initial phases, without appreciable reaction as inferred from calculated lattice parameters. dc 4-probe electrical measurements in the 100-850°C under showed that samples have a metallic behavior, indicating that the percolation threshold was attained for the sample with the lowest content of the TiN (x=25 wt.%), which corresponds to ∼27 vol.%.

Keywords

compositesinteringelectrical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1735: Symposium S/W/CC – Advanced Materials for Photovoltaic, Fuel Cell and Electrolyzer, and Thermoelectric Energy Conversion , 2015 , mrsf14-1735-s10-01
Copyright
Copyright © Materials Research Society 2015 

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References

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