The Study on Carbon Nanofiber (CNF)-Dispersed B4C Composites

被引：17

作者：

Hirota, Ken ^{[1
]}

Nakayama, Yoshihiro ^{[1
]}

Kato, Masaki ^{[1
]}

Nakane, Shingo ^{[2
]}

Nishimura, Toshiyuki ^{[3
]}

机构：

[1] Doshisha Univ, Fac Sci & Engn, Dept Mol Chem & Biochem, Kyoto 6100321, Japan

[2] Nippon Elect Glas Co Ltd, Otsu, Shiga 5208639, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2009年 / 6卷 / 05期

关键词：

MECHANICAL-PROPERTIES; BORON-CARBIDE; CERAMIC-MATRIX; REDUCTION; NANOTUBES; AL2O3;

D O I：

10.1111/j.1744-7402.2008.02323.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Carbon nanofiber (CNF)-dispersed B4C composites have been synthesized and consolidated directly from mixtures of elemental raw powders by pulsed electric current pressure sintering (1800 degrees C/10 min/30 MPa). A 15 vol% CNF/B4C composite with similar to 99% of dense homogeneous microstructures (similar to 0.40 mu m grains) revealed excellent mechanical properties at room temperature and high temperatures: a high bending strength (Sigma(b)) of similar to 710 MPa, a Vickers hardness (H-v) of similar to 36 GPa, a fracture toughness (K-IC) of similar to 7.9 MPa m(1/2), and high-temperature Sigma(b) of 590 MPa at 1600 degrees C in N-2. Interfaces between the CNF and the B4C matrix were investigated using high-resolution transmission electron microscopy, EDS, and electron energy-loss spectroscopy.

引用

页码：607 / 616

页数：10

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