Self-assembly of graphene reinforced ZrO2 composites with deformation-sensing performance

Wu, Jiawen; Xu, Wentao; Dong, Tianwen; Jin, Ming; Zhou, Yucun

doi:10.1016/j.ceramint.2022.07.153

Cited by 4 publications

(2 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To date, considerable progress has been achieved in the field of graphene/YSZ composites having improved electrical and thermal conductivity [ 9 , 10 , 19 , 20 , 21 ] and enhanced mechanical properties [ 22 , 23 , 24 ]. The percolation threshold was achieved for the tetragonal zirconia matrix upon the introduction of 1 wt.% graphene additive [ 20 ], whereas for cubic zirconia upon the addition of 1 wt.% graphene additive.…”

Section: Introductionmentioning

confidence: 99%

“…However, in all cases the electronic conductivity significantly predominated over the ionic component or a gradual decrease in stability was reported. As known the major problems associated with graphene-doped materials are (i) the difficulty in homogeneous Gr distribution in the composite matrix and (ii) the damaging of Gr in the matrix during milling and sintering steps [ 5 , 22 ]. In order to overcome mentioned problems, various graphene derivatives are used nowadays for high-performance composites manufacturing instead of pristine Gr, such as graphene oxide (GO) [ 25 , 26 ], reduced graphene oxide (rGO) [ 18 , 21 , 27 , 28 ], graphene nanoplatelets (GNP) [ 3 , 10 , 23 ], etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mixed Electronic-Ionic Conductivity and Stability of Spark Plasma Sintered Graphene-Augmented Alumina Nanofibres Doped Yttria Stabilized Zirconia GAlN/YSZ Composites

et al. 2023

View full text Add to dashboard Cite

Graphene-doped ceramic composites with mixed electronic-ionic conductivity are currently attracting attention for their application in electrochemical devices, in particular membranes for solid electrolyte fuel cells with no necessity to use the current collector. In this work, composites of the Y2O3-ZrO2 matrix with graphene-augmented γ-Al2O3 nanofibres (GAlN) were spark plasma sintered. The conductivity and electrical stability in cyclic experiments were tested using electrical impedance spectroscopy. Composites with 0.5 and 1 wt.% GAlN show high ionic conductivity of 10−2–10−3 S/cm at 773 K. Around 3 wt.% GAlN percolation threshold was achieved and a gradual increase of electronic conductivity from ~10−2 to 4 × 10−2 S/cm with an activation energy of 0.2 eV was observed from 298 to 773 K while ionic conductivity was maintained at elevated temperatures. The investigation of the evolution of conductivity was performed at 298–973 K. Besides, the composites with 1–3 wt.% of GAlN addition show a remarkable hardness of 14.9–15.8 GPa due to ZrC formation on the surfaces of the materials.

show abstract