Microstructure and mechanical properties of alumina ceramics reinforced by boron nitride nanotubes
Microstructure and mechanical properties of alumina ceramics reinforced by boron nitride nanotubes
复制标题
氮化硼纳米管增强氧化铝陶瓷的微观结构与力学性能
DOI：
10.1016/j.jeurceramsoc.2011.05.042
复制
发表时间：
2011-11-01
影响因子：
5.7
通讯作者：
Bai, Yu-Jun
中科院分区：
文献类型：
--
作者：
Wang, Wei-Li;Bi, Jian-Qiang;Bai, Yu-Jun
采用热压法制备了氮化硼纳米管（BNNTs）/氧化铝复合材料。复合材料的力学性能很大程度上取决于BNNT的含量。与单块氧化铝相比，BNNT的掺入由于有效地抑制了晶粒生长而导致抗弯强度和断裂韧性的提高。常规的增韧机制，特别是BNNT在晶界处的桥接以及BNNT与氧化铝基体之间的充分物理结合，是机械性能提高的主要原因。皇冠版权所有（C）2011由爱思唯尔有限公司出版。保留所有权利。
Boron nitride nanotubes (BNNTs)/alumina composites were fabricated by hot pressing. The mechanical properties of the composites are greatly dependent upon the content of BNNTs. In comparison with monolithic alumina, the incorporation of BNNTs results in the improvement of bending strength and fracture toughness owing to the effective inhibition of grain growth. A routine toughening mechanism, especially the bridging of BNNTs at grain boundaries and the sufficient physical bonding between BNNTs and alumina matrix, is dominantly responsible for the increase in mechanical properties. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.