The graphene/ZrO2 composites were fabricated by impregnating graphene dispersion into the ZrO2 ceramic matrix and sintered by microwave, and the microstructure and mechanical properties were investigated. The results showed that the graphene was well dispersed in the ceramic matrix and refined the grain size. The fracture toughness reached 8.62 MPa m1/2, confirmed by single-edge notched beam, which was 42% higher than that of the pure ZrO2. Also, the toughening mechanisms were investigated by micro-hardness testing and showed that a combination of crack deflection, micro-crack and crack bridging increased the fracture toughness.
RameshS, MeenaloshiniS, TanCY, . Effect of manganese oxide on the sintered properties and low temperature degradation of Y-TZP ceramics. Ceram Int. 2008;34(7):1603–1608. doi: 10.1016/j.ceramint.2007.04.012
2.
ManiconePF, Rossi IommettiP, RaffaelliL.An overview of zirconia ceramics: basic properties and clinical applications. J Dent. 2007;35(11):819–826. doi: 10.1016/j.jdent.2007.07.008
3.
LeeY S, KimH, McIntyrePC, . Atomic layer deposition of ZrO2 on W for metal–insulator–metal capacitor application. Appl Phys Lett. 2003;82(17):2874–2876. doi: 10.1063/1.1569985
4.
IshitsukaM, SatoT, EndoT, . Grain-size dependence of thermal-shock resistance of yttria-doped tetragonal zirconia polycrystals. J Am Ceram Soc. 1990;73(8):2523–2525. doi: 10.1111/j.1151-2916.1990.tb07625.x
5.
SatoT, OhtakiS, ShimadaM.Transformation of yttria partially stabilized zirconia by low temperature annealing in air. J Mater Sci. 1985;20(4):1466–1470. doi: 10.1007/BF01026344
6.
DenryI, KellyJR.State of the art of zirconia for dental applications. Dent Mater. 2008;24(3):299–307. doi: 10.1016/j.dental.2007.05.007
7.
GuoR, GuoD, ZhaoD, . Low temperature ageing in water vapor and mechanical properties of ZTA ceramics. Mater Lett. 2002;56(6):1014–1018. doi: 10.1016/S0167-577X(02)00666-3
8.
RameshS, NgCK, TanCY, . Effects of sintering on the mechanical and ionic properties of ceria-doped scandia stabilized zirconia ceramic. Ceram Int. 2016;42(13):14469–14474. doi: 10.1016/j.ceramint.2016.06.050
9.
DuX, SkachkoI, BarkerA, . Approaching ballistic transport in suspended graphene. Nat Nanotechnol. 2008;3(8):491–495. doi: 10.1038/nnano.2008.199
10.
LiQ, ZhangY, GongH, . Enhanced fracture toughness of pressureless-sintered SiC ceramics by addition of graphene. J Mater Sci Technol. 2016;32(7):633–638. doi: 10.1016/j.jmst.2016.01.009
11.
NetoAHC, GuineaF, PeresNMR, . The electronic properties of graphene. Rev Mod Phys. 2009;81(1):109–162. doi: 10.1103/RevModPhys.81.109
12.
NairRR, BlakeP, GrigorenkoAN, . Fine structure constant defines visual transparency of graphene. Science. 2008;320(5881):1308–1308. doi: 10.1126/science.1156965
13.
EdwardsRS, ColemanKS.Graphene synthesis: relationship to applications. Nanoscale. 2013;5:38–51. doi: 10.1039/C2NR32629A
14.
Ayán-VarelaM, ParedesJ, Villar-RodilS, . A quantitative analysis of the dispersion behavior of reduced graphene oxide in solvents. Carbon N Y. 2014;75:390–400. doi: 10.1016/j.carbon.2014.04.018
15.
RincónA, MorenoR, ChinelattoASA, . Effect of graphene and CNFs addition on the mechanical and electrical properties of dense alumina-toughened zirconia composites. Ceram Int. 2016;42(1):1105–1113. doi: 10.1016/j.ceramint.2015.09.037
16.
ChenF, JinD, TyebK, . Field assisted sintering of graphene reinforced zirconia ceramics. Ceram Int. 2015;41(4):6113–6116. doi: 10.1016/j.ceramint.2014.12.147
17.
DuszováA, DuszaJ, TomášekK, . Microstructure and properties of carbon nanotube/zirconia composite. J Eur Ceram Soc. 2008;28(5):1023–1027. doi: 10.1016/j.jeurceramsoc.2007.09.011
18.
RameshS, KhanMM, Alexander CheeHC, . Sintering behaviour and properties of graphene oxide-doped Y-TZP ceramics. Ceram Int. 2016;42(15):17620–17625. doi: 10.1016/j.ceramint.2016.08.077
19.
ShinJH, HongSH.Fabrication and properties of reduced graphene oxide reinforced yttria-stabilized zirconia composite ceramics. J Eur Ceram Soc. 2014;34(5):1297–1302. doi: 10.1016/j.jeurceramsoc.2013.11.034
20.
KimHJ, LeeSM, OhYS, . Unoxidized graphene/alumina nanocomposite: fracture- and wear-resistance effects of graphene on alumina matrix[J]. Sci Rep. 2014;4(7503):5176.
21.
LiuJ, YangY, HasssininH, . Graphene–alumina nanocomposites with improved mechanical properties for biomedical applications. ACS Appl Mater Inter. 2016;8(4):2607–2616. doi: 10.1021/acsami.5b10424
NietoA, LahiriD, AgarwalA.Graphene nano platelets reinforced tantalum carbide consolidated by spark plasma sintering. Mater Sci Eng A. 2013;582:338–346. doi: 10.1016/j.msea.2013.06.006
XiaH, ZhangX, ShiZ, . Mechanical and thermal properties of reduced graphene oxide reinforced aluminum nitride ceramic composites. Mater Sci Eng A. 2015;639:29–36. doi: 10.1016/j.msea.2015.04.091
28.
TanY, ZhangH, PengS.Electrically conductive graphene nanoplatelet/boron carbide composites with high hardness and toughness. Scripta Mater. 2016;114:98–102. doi: 10.1016/j.scriptamat.2015.12.008
29.
BelmonteM, NistalA, BoutbienP, . Toughened and strengthened silicon carbide ceramics by adding graphene-based fillers. Scripta Mater. 2016;113:127–130. doi: 10.1016/j.scriptamat.2015.10.023
30.
FerrariAC, MeyerJC, ScardaciV, . Raman spectrum of graphene and graphene layers. Phys Rev Lett. 2006;97(18):187401. doi: 10.1103/PhysRevLett.97.187401
