Nanoplates forced alignment of multi-walled carbon nanotubes in alumina composite with high strength and toughness

被引：15

作者：

Mustafa, Tufail ^{[1
,2
]}

Huang, Jilong ^{[1
]}

Gao, Jie ^{[1
]}

Yan, Peng ^{[1
]}

Liu, Yongping ^{[1
]}

Ruiz, Karla Hernandez ^{[1
]}

Sun, Shikuan ^{[3
]}

Du, Jishi ^{[4
]}

Fan, Yuchi ^{[1
]}

Jiang, Wan ^{[1
]}

机构：

[1] Donghua Univ, Coll Mat Sci & Engn, Inst Funct Mat, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[2] Balochistan Univ Informat Technol Engn & Manageme, Dept Chem Engn, Quetta 87300, Pakistan

[3] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China

[4] CAEP, Inst Elect Engn, Mianyang 621900, Sichuan, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Carbon nanotubes; Ceramic composites; Alignment; Strengthening; Toughening; ELECTRICAL-CONDUCTIVITY; SI2BC3N CERAMICS; MICROSTRUCTURE; TEMPERATURE; MWCNTS; FAILURE; FIBER;

D O I：

10.1016/j.jeurceramsoc.2021.05.004

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：

Although the strengthening and toughening effects on ceramic composites are expected to be maximized by alignment of multi-walled carbon nanotubes (MWCNTs) in matrices, this concept has been rarely realized in practice due to the lack of convenient processing strategy. Here, the alignment of MWCNTs in alumina composite can be readily obtained by using alpha-Al2O3 nanoplates as raw powder. With the assistance of vacuum filtration and pressure in sintering, the highly aligned MWCNTs in alumina matrix are formed in in-plane direction. Accordingly, the strength and toughness in 1.5 wt% MWCNTs/alumina composite are improved by 58 % and 66 % with respect to monolithic alumina, respectively. Transmission electron microscopy observation reveals that the MWCNTs under great compressive residual stress are mainly embedded inside the grains, leading to much stronger grain boundaries. Meanwhile, the toughening effect is mainly attributed to the highly energy dissipating bridging and pullout, owing to the very effective load transfer.

引用

页码：5541 / 5547

页数：7

共 41 条

[1] Reinforcing capability of multiwall carbon nanotubes in alumina ceramic hybrid nanocomposites containing zirconium oxide nanoparticles [J].