TY - JOUR

T1 - Phase formation and the electrical properties of YSZ/rGO composite ceramics sintered using silicon carbide powder bed

AU - Glukharev, Artem

AU - Glumov, Oleg

AU - Smirnov, Ivan

AU - Boltynjuk, Evgeniy

AU - Kurapova, Olga

AU - Konakov, Vladimir

N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Fully stabilized zirconia/graphene composites are very promising advanced structural materials having mixed ion–electron conductivity for energy storage and energy conversion appli-cations. The existing methods of the composite manufacturing have a number of disadvantages that limit their practical use. Thus, the search for new sintering methods is an actively developing area. In this work, we report for the first time the application of the SiC powder bed sintering technique for fully stabilized zirconia (YSZ) composite fabrication. The reduced graphene oxide (rGO) was used as a graphene derivative. As a result, well‐formed ceramics with high density and crystallinity, the maximal microhardness of 13 GPa and the values of the ionic conductivity up to 10−2 S/cm at 650 °C was obtained. The effects of the sintering conditions and rGO concentration on the micro-structure and conductivities of ceramics are discussed in detail. The suggested powder bed sinter-ing technique in a layered graphite/SiC/graphite powder bed allowed well‐formed dense YSZ/rGO ceramics fabrication and can become a suitable alternative to existing methods for various oxide ceramic matrix composite fabrication: both conventional sintering and non‐equilibrium (SPS, flash sintering) approaches.

AB - Fully stabilized zirconia/graphene composites are very promising advanced structural materials having mixed ion–electron conductivity for energy storage and energy conversion appli-cations. The existing methods of the composite manufacturing have a number of disadvantages that limit their practical use. Thus, the search for new sintering methods is an actively developing area. In this work, we report for the first time the application of the SiC powder bed sintering technique for fully stabilized zirconia (YSZ) composite fabrication. The reduced graphene oxide (rGO) was used as a graphene derivative. As a result, well‐formed ceramics with high density and crystallinity, the maximal microhardness of 13 GPa and the values of the ionic conductivity up to 10−2 S/cm at 650 °C was obtained. The effects of the sintering conditions and rGO concentration on the micro-structure and conductivities of ceramics are discussed in detail. The suggested powder bed sinter-ing technique in a layered graphite/SiC/graphite powder bed allowed well‐formed dense YSZ/rGO ceramics fabrication and can become a suitable alternative to existing methods for various oxide ceramic matrix composite fabrication: both conventional sintering and non‐equilibrium (SPS, flash sintering) approaches.

KW - Ceramic matrix composites

KW - Graphene

KW - Impedance spectroscopy

KW - Powder bed sintering

KW - Yttria‐stabilized zirconia

KW - SOLID-ELECTROLYTE

KW - powder bed sintering

KW - GRAPHENE

KW - ceramic matrix composites

KW - graphene

KW - FIBERS

KW - impedance spectroscopy

KW - YTTRIA-STABILIZED ZIRCONIA

KW - CONDUCTIVITY

KW - yttria-stabilized zirconia

UR - http://www.scopus.com/inward/record.url?scp=85121809569&partnerID=8YFLogxK

U2 - 10.3390/app12010190

DO - 10.3390/app12010190

M3 - Article

AN - SCOPUS:85121809569

VL - 12

JO - Applied Sciences (Switzerland)

JF - Applied Sciences (Switzerland)

SN - 2076-3417

IS - 1

M1 - 190

ER -