Electroconductive composite of zirconia and hybrid graphene/alumina nanofibers

Hussainova, Irina; Drozdova, Maria; Pérez-Coll, Domingo; Rubio-Marcos, Fernando; Jasiuk, Iwona; Soares, Julio A. N. T.; Rodríguez, Miguel Á.

doi:10.1016/j.jeurceramsoc.2016.12.033

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…Graphene is a 2D carbon nanomaterial composed of carbon atoms, which has excellent mechanical properties. [140,141] Its tensile strength is 130 GPa and Young's modulus is 1100 GPa. In addition, graphene also has good thermal conductivity and optical properties, and can be used as biomaterials through chemical modification.…”

Section: Graphene Tougheningmentioning

confidence: 99%

ZrO₂ Matrix Toughened Ceramic Material‐Strength and Toughness

Liang

et al. 2022

Adv Eng Mater

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ZrO2 ceramic exhibits the characteristics of high hardness, good thermochemical stability, desirable biocompatibility, and unique stress‐activated tetragonal to monoclinic transformation toughening, thus having broad development prospects. However, as a typical ceramic material, it has the common shortcoming of brittleness and seriously limits the possible applications. In recent years, worldwide efforts have been made to improve the toughness of ZrO2 ceramic materials, which has great significance in promoting its industrial application. Herein, the influences of phase composition, stabilizer, grain size, and sintering method on fracture toughness of ZrO2 ceramic are introduced. The mechanism of phase transformation toughening, single‐phase and multiphase material dopant toughening, and lamellar ceramic toughening are also summarized. Moreover, the prevailing applications of toughened ZrO2‐based materials in structural ceramics, coatings, and biomaterials are discussed. The present review may offer insights in designing and fabricating ZrO2 materials with high strength and toughness to provide better performances in diverse applications fields.

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Section: Graphene Tougheningmentioning

confidence: 99%

ZrO₂ Matrix Toughened Ceramic Material‐Strength and Toughness

Liang

et al. 2022

Adv Eng Mater

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“…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%

“…Based on the dilatometry data authors of [ 32 ] have shown that graphene-zirconia composites demonstrate the mixed mechanism of sintering with a grain boundary diffusion predominance. Such techniques as spark plasma sintering (SPS) [ 9 , 10 , 19 , 33 ], sintering using silicon carbide bed [ 21 ], sintering in the air [ 18 ], tape casting [ 26 ] and hot pressing [ 33 ] are used in the literature to produce zirconia/graphene composites. Following [ 33 ] SPS and hot-pressing techniques were shown to be effective to produce fully dense zirconia/carbon nanofiber composites with high electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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“…Experimentally, it has been demonstrated that addition of graphene nanoplatelets to ceramic matrix also can enhance electrical conductivity by orders of magnitudes depending on the concentration of the fillers [12,13]. Similarly, enhanced conductivity of an insulating material such as alumina, by incorporation of nanorods, is shown to be dependent on the concentration and the aspect ratio of the conductive fillers [12,14], which affects the tunneling length and subsequently electrical percolation threshold [13][14][15]. On the other hand, a vast number of studies have proven that graphene fillers are suitable candidates for a variety of applications such as electromagnetic interference (EMI) shielding.…”

Section: Introductionmentioning

confidence: 99%