Inclined slit-based pullout method for determining interfacial strength of multi-walled carbon nanotube-alumina composites
Inclined slit-based pullout method for determining interfacial strength of multi-walled carbon nanotube-alumina composites
复制标题
DOI：
10.1016/j.carbon.2014.07.024
复制
发表时间：
2014-11-01
期刊：
影响因子：
10.9
通讯作者：
Hashida, Toshiyuki
中科院分区：
文献类型：
--
作者：
Nozaka, Yo;Wang, Weili;Hashida, Toshiyuki
本文描述了一种测试方法，使我们能够通过实验确定 MWCNT/陶瓷复合材料中多壁碳纳米管 (MWCNT) 和陶瓷基体之间的界面强度。本研究开发的测试方法名为“倾斜狭缝拉拔法”，包括单纳米管拉拔技术和聚焦离子束（FIB）技术，该技术能够在拉拔测试过程中将多壁碳纳米管从陶瓷基体中拉出。使用扫描电子显微镜中的纳米操纵器系统将嵌入氧化铝基复合材料断裂表面的单个多壁碳纳米管拉出。 MWCNT 的嵌入长度通过使用 FIB 技术来控制，即通过在复合材料的断裂表面附近制作倾斜的通缝。本研究中测试的 3 个 MWCNT 的 MWCNT 和氧化铝基体之间的平均界面强度经评估为 19.2 +/- 6.6 MPa。发现该值大约接近于根据复合材料断裂表面上的 MWCNT 拉拔长度估计的值，支持了本研究中开发的测试方法的有效性。 (C) 2014 Elsevier Ltd. 保留所有权利。
This paper describes a testing method which enables us to determine experimentally the interfacial strength between multi-walled carbon nanotube (MWCNT) and ceramic matrix in MWCNT/ceramic composites. The testing method developed in this research, named "Inclined slit-based pullout method", includes a single nanotube pullout technique and a focused ion beam (FIB) technique, which enables MWCNTs to be pulled out from the ceramic matrix during the pullout tests. Single MWCNTs embedded in a fracture surface of an alumina matrix composite are pulled out using a nanomanipulator system in a scanning electron microscope. Embedded lengths of the MWCNTs are controlled by using the FIB technique, i.e., by making an inclined through-slit near the fracture surface of the composite. The average interfacial strength between the MWCNTs and alumina matrix is evaluated to be 19.2 +/- 6.6 MPa for 3 MWCNTs tested in this research. This value is found to be approximately close to that estimated from pullout lengths of the MWCNTs on the fracture surface of the composite, supporting the validity of the testing methods developed in this research. (C) 2014 Elsevier Ltd. All rights reserved.