Properties of alumina matrix composites reinforced with SiC whisker and carbon nanotubes

The effect of pitch-based carbon fiber microstructure and composition on the formation and growth of SiC whiskers via reaction of such fibers with silicon sources

“…SiC whiskers (SiCw) have attracted considerable attention due to their excellent mechanical, electrical and optical properties, and they are extensively used for reinforcing advanced composites with various matrices and in electronic devices, operating under extremely harsh conditions [1][2][3][4][5][6][7][8][9][10]. Due to the great interest in silicon carbide whiskers for materials technology, numerous methods have been developed to prepare SiC whiskers, including pyrolysis of polyureasilazane precursor [11], carbon nanotube-confined reaction [12], chemical vapor deposition [13], sol-gel synthesis [14,15], carbothermal reduction [16,17], and direct chemical reactions [18].…”

Recent Advances and Future Prospects in Spark Plasma Sintered Alumina Hybrid Nanocomposites

“…This is specifically important if a nanopowder matrix is reinforced with nanoparticles, nanotubes, and nanosheets to prepare a hybrid nanocomposite powder. Methods, such as simple wet dispersion and probe sonication [35,36], ball milling [24,32,37,38,39,40,41], molecular level mixing [21,26,42,43], sol-gel processing [44,45,46,47], and colloidal processing [22,23,35,48,49] were used to improve the dispersion of the reinforcements in alumina matrix.…”

“…Traditional sintering techniques, such as furnace sintering [36] and hot pressing sintering [35,38,50,51,52], were used to sinter alumina hybrid nanocomposites that were reinforced with SWNTs and MWCNTs [36], MWCNTs and SiCw [38], graphene nanoplatelets (GNPs) and CNTs [35], SiCW and TiC [50], Graphene and Carbon nanotube [51], and ZrO 2 and MWCNTs [52]. Although these techniques are known for their limitation in preventing the growth of the alumina matrix, the reported values of measured properties were not far from those obtained by the spark plasma sintering method.…”

Preliminary study on the growth mechanism of zircon whiskers prepared via non-hydrolytic sol-gel method combined with carbon black as reducing agent

“…By adding whiskers into the ceramic tool composites, the strength and toughness can be significantly improved [3][4][5]. However, there are very few types of whiskers commercially available on a large scale [6,7]. Zircon whiskers can be a potential reinforcing phase for ceramic composites to enhance the comprehensive mechanical properties, due to their high strength, modulus, wear resistance, thermal stability and melting point, low thermal expansion coefficient and cost [8][9][10][11].…”