Densification and microstructure of spark plasma sintered 7YSZ–Gd 2 O 3 ceramic nano-composites

E. Serrano Pérez, H. Martinez Gutierrez, K. J. Martinez Gonzalez, E. Marín Moares, F. Juárez López

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Spark plasma sintering (SPS) technique was used to densify 7 mol% yttria-stabilized zirconia (7YSZ) powder with Gd 2 O 3 -particles, at temperatures ranging between 1000 and 1200 °C. Fine dispersion of Gd 2 O 3 -particles into a full-densified matrix was achieved. Shrinkage and microstructure, as well as porosity were investigated. The fine Gd 2 O 3 -particles distributed into 7YSZ matrix have influence over the sintering consolidation and final microstructure. An increment in the spark plasma sintering temperature around 70 °C is detected when Gd 2 O 3 particles are present. The thermal characterization was performed using the photothermal infrared radiometry technique. Both thermal diffusivity and thermal conductivity display a similar sigmoidal (Boltzmann type) behavior with the Gd 2 O 3 concentration in the samples.

Original languageEnglish
Pages (from-to)266-275
Number of pages10
JournalJournal of Asian Ceramic Societies
Volume5
Issue number3
DOIs
StatePublished - Sep 2017

Keywords

  • Rare earths
  • Spark plasma sintering
  • Yttria-stabilized zirconia

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