Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

Abstract

<jats:title>Abstract</jats:title><jats:p>Nanocarbon materials (carbon nanotubes, graphene, graphene oxide, reduced graphene oxide, etc.) are considered the ideal toughening phase of ceramic matrix composites because of their unique structures and excellent properties. The strengthening and toughening effect of nanocarbon is attributed to several factors, such as their dispersibility in the matrix, interfacial bonding state with the matrix, and structural alteration. In this paper, the development state of nanocarbon-toughened ceramic matrix composites is reviewed based on the preparation methods and basic properties of nanocarbon-reinforced ceramic matrix composites. The assessment is implemented in terms of the influence of the interface bonding condition on the basic properties of ceramic matrix composites and the methods used to improve the interface bonding. Furthermore, the strengthening and toughening mechanisms of nanocarbon-toughened ceramic matrix composites are considered. Moreover, the key problems and perspectives of research work relating to nanocarbon-toughened ceramic matrix composites are highlighted.</jats:p>

Effect of Interfacial Structure on Mechanical Properties of Graphene Reinforced Al2O3–WC Matrix Ceramic Composite

“…Figure 4 f shows the IFFT image of the box region labelled in Figure 4 d; it can be determined that the lattice spacing of the interfacial region is 0.19 nm, which is in accordance with the (102) plane of Al 2 OC. The formation of Al 2 OC can be attributed to the following chemical reactions [ 30 , 31 ]: Al 2 O 3 grains in the presence of graphene undergo a carbothermal reduction to form gaseous Al 2 O which further reacts with residual carbon to form Al 2 OC.…”

Ceramic Toughening Strategies for Biomedical Applications

“…The toughening effect of fine-grain reinforcement is quite obvious according to the Hall-Petch formula. And the vital factors influencing the efficiency of fine-grained toughening include the content of second phase, the geometric shape, as well as the temperature and impurities ( Liu et al, 2020 ).…”

Enhanced electrical property of graphite/Al2O3 composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer

“…However, graphene is easily agglomerated by van der Waals (vdW) forces and its high specific surface area [26]. To achieve uniformly dispersion of graphene in solvent and ceramic matrix for reaching maximum capability as electrically conductive ceramics, further surface modification of graphene is required [27,28]. To overcome the drawbacks as mentioned in above conventional process, we have previously reported a novel fabrication process of nano-carbon/alumina composite via recombined process of gel-casting and reductive sintering [1,[29][30][31][32].…”