Engineered Nanostructures for Multifunctional Single-Walled Carbon Nanotube Reinforced Silicon Nitride Nanocomposites

被引：66

作者：

Corral, Erica L. ^{[1
]}

Cesarano, Joseph, III ^{[2
]}

Shyam, Amit ^{[3
]}

Lara-Curzio, Edgar ^{[3
]}

Bell, Nelson ^{[2
]}

Stuecker, John ^{[2
]}

Perry, Nicola ^{[1
]}

Di Prima, Matthew ^{[1
]}

Munir, Zuhair ^{[4
]}

Garay, Javier ^{[4
]}

Barrera, Enrique V. ^{[1
]}

机构：

[1] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77251 USA

[2] Sandia Natl Labs, Albuquerque, NM 87185 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[4] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2008年 / 91卷 / 10期

关键词：

D O I：

10.1111/j.1551-2916.2008.02533.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Colloidal processing was used to make highly dispersed aqueous composite suspensions containing single-wall carbon nanotubes (SWNTs) and Si3N4 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 degrees 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 Si3N4 were observed for the 2.0-vol% SWNT-Si3N4 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.

引用

页码：3129 / 3137

页数：9

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