High-resolution TEM characterization of SiC nanowires as reinforcements in a nanocrystalline Mg-matrix

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].…”

“…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]. However, existing syntheses for the large-scale production of SiC whiskers generally yield low purity products with various structural defects [8,19] or require costly precursors [11], rigorous handing of volatile reagents [13] and high temperature [18].…”

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

“…A novel manufacturing technology that comprises a combination of cryomilling and spark plasma sintering has recently been successfully applied to fabricate nanocrystalline Mg-30Al and AZ80 alloys [29][30][31][32]. The nanocrystalline AZ80 exhibited an excellent compressive yield stress of 442 MPa and ultimate compressive strength of 546 MPa with an average compressive strain to failure of 3.7%.…”

Strengthening behavior in high content SiC nanowires reinforced Al composite

“…Although the relative density was significantly decreased with the increase of SiC nanowires, however the wear resistance was increased with the volume percentage of SiC nanowires. Pozuelo et al [15] prepared 0.14 wt% bamboo shaped SiC nanowires reinforced Mg (SiCnw/Mg) composite by spark plasma sintering method, in which the microstructure of bamboo shaped SiC nanowires in the composite was investigated in-depth.…”