TY - JOUR
T1 - Engineered nanostructures for multifunctional single-walled carbon nanotube reinforced silicon nitride nanocomposites
AU - Corral, Erica L.
AU - Cesarano, Joseph
AU - Shyam, Amit
AU - Lara-Curzio, Edgar
AU - Bell, Nelson
AU - Stuecker, John
AU - Perry, Nicola
AU - Di Prima, Matthew
AU - Munir, Zuhair
AU - Garay, Javier
AU - Barrera, Enrique V.
PY - 2008/10
Y1 - 2008/10
N2 - Colloidal processing was used to make highly dispersed aqueous composite suspensions containing single-wall carbon nanotubes (SWNTs) and Si 3N4 particles. The SWNTs and Si3N4 particles were stabilized into composite suspensions using a cationic surfactant at low pH values. Bulk nanocomposites containing 1.0, 2.0, and 6.0 vol% SWNTs were successfully fabricated using rapid prototyping. The survival of SWNTs was detected, using Raman spectroscopy, after high-temperature sintering, up to 1800°C. The nanocomposites have densities up to 97% of the composite theoretical density. The engineered nanostructures reveal an increase in grindability and damage tolerance behavior over the monolithic ceramic. We also observed toughening mechanisms such as SWNT crack bridging and pull-out, indicating that SWNTs have the potential to serve as toughening agents in ceramics. Increased fracture toughness values over the monolithic Si 3N4 were observed for the 2.0-vol% SWNT-Si 3N4 nanocomposite when a given sintered microstructure was present. We report here the effects of colloidal processing on mechanical behavior of SWNT reinforced nonoxide ceramic nanocomposites.
AB - Colloidal processing was used to make highly dispersed aqueous composite suspensions containing single-wall carbon nanotubes (SWNTs) and Si 3N4 particles. The SWNTs and Si3N4 particles were stabilized into composite suspensions using a cationic surfactant at low pH values. Bulk nanocomposites containing 1.0, 2.0, and 6.0 vol% SWNTs were successfully fabricated using rapid prototyping. The survival of SWNTs was detected, using Raman spectroscopy, after high-temperature sintering, up to 1800°C. The nanocomposites have densities up to 97% of the composite theoretical density. The engineered nanostructures reveal an increase in grindability and damage tolerance behavior over the monolithic ceramic. We also observed toughening mechanisms such as SWNT crack bridging and pull-out, indicating that SWNTs have the potential to serve as toughening agents in ceramics. Increased fracture toughness values over the monolithic Si 3N4 were observed for the 2.0-vol% SWNT-Si 3N4 nanocomposite when a given sintered microstructure was present. We report here the effects of colloidal processing on mechanical behavior of SWNT reinforced nonoxide ceramic nanocomposites.
UR - http://www.scopus.com/inward/record.url?scp=53349090240&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2008.02533.x
DO - 10.1111/j.1551-2916.2008.02533.x
M3 - Article
AN - SCOPUS:53349090240
SN - 0002-7820
VL - 91
SP - 3129
EP - 3137
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 10
ER -