Preparation of Fine-Grained CeO2–SiC Ceramics for Inert Fuel Matrices by Spark Plasma Sintering.

Alekseeva, L. S.; Nokhrin, A. V.; Boldin, M. S.; Lantsev, E. A.; Orlova, A. I.; Chuvil'deev, V. N.; Sakharov, N. V.

High-density (95.3–95.8%) CeO2–xα-SiC (x = 10, 20 vol %) composite ceramics have been produced for the first time by spark plasma sintering (SPS) as promising mineral-like materials for inert fuel matrices. The SPS of CeO2–SiC ceramics has been shown to be a three-stage process. The addition of α-SiC particles shifts characteristic temperatures of CeO2 sintering to higher values. SPS leads to an increase in the hardness, fracture toughness, and thermal conductivity of cerium dioxide-based ceramics.

CERAMICS; SINTERING; FRACTURE toughness; DEBYE temperatures; FUEL

Inorganic Materials, 2020, Vol 56, Issue 12, p1307

0020-1685

Academic Journal

10.1134/S0020168520120018