Microstructure, mechanical and thermal properties of B4C/CNT composites with Al additive

被引：39

作者：

Kobayashi, Tomohiro ^{[1
]}

Yoshida, Katsumi ^{[2
]}

Yano, Toyohiko ^{[2
]}

机构：

[1] Tokyo Inst Technol, Dept Nucl Engn, Grad Sch Sci & Engn, Meguro Ku, Tokyo 1528550, Japan

[2] Tokyo Inst Technol, Nucl Reactors Res Lab, Meguro Ku, Tokyo 1528550, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 440卷 / 1-3期

关键词：

REINFORCED ALUMINA NANOCOMPOSITE; CARBON NANOTUBES; CONDUCTIVITY; TEMPERATURE; FABRICATION; STRENGTH; B4C;

D O I：

10.1016/j.jnucmat.2013.02.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

B4C matrix composites containing 0.5-10 vol% carbon nanotubes (CNTs) were fabricated by hot-pressing using Al additive and the effects of CNT addition on mechanical and thermal properties of the B4C/CNT composites were investigated for improvement of control material of fission reactors. Bulk densities of the composites decreased with increasing the amount of CNT. The CNTs in the composites were orientated slightly perpendicular to the hot-pressing direction and the anisotropic microstructure was formed. Vickers hardness and elastic modulus of the composites decreased with an increase in the amount of CNT. Fracture toughness of the composites was slightly improved by CNT addition, and at high CNT contents, bridging by CNT was observed in the cracks. Thermal conductivities of the composites increased slightly as compared with those of B4C without CNT. However, clear improvement effect by the CNT addition on the thermal conductivities of the composites was not observed within the evaluated compositions. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：524 / 529

页数：6

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