Graphene Based Oxide Ceramic Composites with High Mechanical and Functional Performance: from Preparation to Property

doi:10.15541/jim20170363

Abstract

Abstract:

It is of great importance to enhance the performance of oxide ceramic composite for fulfilling the increasing requirements from modern society. To this end, graphene is very suitable to be exploited as reinforcement for achieving superior performance in oxide ceramic composites, due to its extraordinary mechanical and electrical properties. In this review, the study of graphene based oxide ceramic composite including the processing, densification, microstructure and properties, based on the reports and researches in the past decade. It can be seen that: (1) the incorporation of graphene can generally improve the strength, fracture toughness and strain tolerance of oxide ceramic composite; (2) for the electrical performance, the graphene/oxide ceramic composites show not only low percolation threshold and high electrical conductivity, but also tunable charge carrier type which can be controlled by the oxygen concentration in oxide matrix. Therefore, it is believed that the graphene based oxide ceramic composites are very promising material for the application requiring both advanced mechanical and functional properties.

Key words: graphene, ceramic matrix composite, materials processing, mechanical property, electrical property, review

CLC Number:

TQ174

FAN Yu-Chi, WANG Lian-Jun, JIANG Wan. Graphene Based Oxide Ceramic Composites with High Mechanical and Functional Performance: from Preparation to Property[J]. Journal of Inorganic Materials, 2018, 33(2): 138-146.

Figures/Tables 8

Fig. 1 Schematic illustration of exfoliating GNSs from graphite pallets [8] The arrows indicate the shear effect in a ball milling process

Fig. 2 SEM image of fracture surface for graphene nanosheet/ Al2O3 composite prepared via mechanical exfoliation[8-9]

Fig. 3 TEM image of graphene/Al2O3 composite prepared by heteroaggregation[16]

Fig. 4 Schematic illustration showing 2D graphene can retard the coarsening of grain most effectively[21] (a), (b), (c) show the situation for nano-particle, 1D inclusion and 2D inclusion, respectively

Fig. 5 Graphene prohibits grain boundary reaching dynamic balance[21] The yellow and white arrows indicate grain boundaries with and without graphene, respectively

Fig. 6 Stain-stress plots of monolithic Al2O3 ceramic (black), FLG/Al2O3 composite before (red) and after (blue) burn-off for 20 h during four-point bending test, respectively[22]

Table 1 Comparison of some reported graphene/oxide ceramic composites

Matrix	Raw material of graphene^*	Mixing method	Percolation threshold	Maximum electrical conductivity	Reference
Al₂O₃	GO	Heteroaggregation	0.38vol%	1038.15 S•m^-1 for 2.35vol%	[16]
Al₂O₃	GO	Heteroaggregation	0.22wt%	11.1 S•m^-1 for 0.45wt%	[31]
Al₂O₃	G	Stirring + Ball milling	7.1vol%	20.1 S•m^-1 for 15vol%	[32]
Al₂O₃	G	Planetary ball milling	<0.5vol%	123.3 S•m^-1 for 2vol%	[33]
Al₂O₃	GN	Attrition ball milling	3vol%	10³S•m^-1 for 15vol%	[34]
Al₂O₃	EG	Planetary ball milling	3vol%	5709 S•m^-1 for 15vol%	[8]
Al₂O₃	EG	Attrition ball milling	4.7-5.7vol%	9.6×10^-2S•m^-1 for 9.4vol%	[35]
YSZ	GO	Sonication	2.5vol%	1.2×10⁴S•m^-1 for 4.1vol%	[36]
SiO₂	GO	Heteroaggregation	<0.58wt%	10^-2S•m^-1 for 0.98wt%	[37]
ZrO₂	GN	Planetary ball milling	<1wt%	98 S•m^-1 for 3wt%	[38]

Fig. 7 (a) Electrical conductivity of graphene/Al2O3 composites as a function of filler volume fraction; (b) Hall coefficient plotted against filler volume fraction[16]

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