Graphene reinforced alumina nano-composites

Spark plasma sintering of Si3N4/multilayer graphene composites

“…In addition, they possess excellent electric, thermal and optical properties, too. In the last decade a number of studies with polymer [8], metal and ceramic-based matrices [9][10] have been demonstrated that graphene can significantly improve the charge transport, thermal, and mechanical properties of the composites, even at relatively low nanofiller loadings [11][12].…”

Scratch behaviour of graphene alumina nanocomposites

“…The microstructural characterisation of the prepared composites using X-ray diffraction and Raman spectroscopy has been reported in Ref. 34. Figure 1 shows SEM images of the distribution of GNP in the alumina-GNP (2 and 5 vol.-%) composites.…”

“…This was also confirmed by Raman spectroscopy. 34 Figure 2 shows the scratch test data recorded for alumina-GNP (5 vol.-%) composite over a distance of 10 mm with an increasing applied load of 1 to 200 N. The COF and acoustic emission (AE) signals were recorded during the scratch test for all of the samples. The COF increases with increasing scratch distance and increasing applied load.…”

“…34. It has been shown that brittleness index is a better parameter for quantifying the wear properties of the materials compared to hardness and fracture toughness taken separately.…”

Microstructure and Mechanical Properties of Nanofiller Reinforced Tantalum-Niobium Carbide Formed by Spark Plasma Sintering

“…The second is that the lower sintering temperature along with the fast consolidation process lends to the retention of the GNPs structure after sintering [18,21,60]. The orientation of platelet-structured particles has been previously seen during compression in SiC reinforced Al 2 O 3 composites [62] as well as in GNP reinforced composites [21,60,63]. This alignment and orientation of the GNP will have an effect on the electrical properties of GNP reinforced composites as well as have a possible effect on the toughening mechanisms.…”