Tribological and electrical properties of ceramic matrix composites with carbon nanotubes

Carbon Nanofibers Reinforced Ceramic Matrix Composites

“…Generally speaking, the carbon black, which was used for reference reasons, is less efficient, while larger CNFs or higher amounts of SWNT+MWNT form more conductive networks (588 S/m for HP alumina-5%CNF, and 853 S/m for magnesium aluminate-12.2%CNT, respectively). Similar results were found recently for series of zirconia, alumina and silicon nitride based CMCs (Duszová et al, 2008b;Hvizdoš et al, 2011b). These results are summarized in Fig.…”

“…In Si 3 N 4 -10%CNT the COF values dropped to ~0.2 which was comparable to the values for ZrO 2 -CNF. Similar values were found for self mated friction of alumina (Hvizdoš et al, 2011b). Here, only monolith and 10% CNT containing composite are given, but the tendency is very similar to that of silicon nitride materials and more than 60% reduction of friction coefficient was reported.…”

“…Pavol Hvizdos, Viktor Puchy, Annamaŕia Duszová and Jań Dusza (2011). Carbon Nanofibers Reinforced Ceramic Matrix Composites, Nanofibers -Production, Properties and Functional Applications, Dr. Tong Lin (Ed.…”

“…For lower applied load, however, the main wear mechanism in the zirconia is typically self-polishing by low intensity abrasion. (Hvizdoš et al, 2011a;Hvizdoš et al, 2011b). Self-mated wear of monolithic silicon nitride was studied in various situations and can be summarized both in terms of the friction coefficient ( Fig.…”

Scratch behaviour of graphene alumina nanocomposites

“…They suggested that MWCNTs affect the tribological properties of alumina composites indirectly by influencing their mechanical properties and directly by acting as a lubricating medium. Hvizdos et al 27 reported an improvement in the tribological properties of silicon nitride, zirconia and alumina composites with the addition of MWCNTs. In the works reported on graphene nanoplatelet (GNP) composites, Hvizdos et al 28 and Belmonte et al 29 reported an improvement of *60 and 56% respectively in the wear resistance of silicon nitride with the addition of GNP.…”