Microstructure and strength of nano-/ultrafine-grained carbon nanotube-reinforced titanium composites processed by high-pressure torsion

被引：36

作者：

Li, F. X. ^{[1
,2
]}

Hao, P. D. ^{[1
]}

Yi, J. H. ^{[1
]}

Chen, Z. ^{[2
]}

Prashanth, K. G. ^{[2
,3
]}

Maity, T. ^{[4
]}

Eckert, J. ^{[2
,4
]}

机构：

[1] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[3] Norwegian Univ Sci & Technol, Dept Mfg & Civil Engn, Teknol Vegen 22, N-2815 Gjovik, Norway

[4] Univ Leoben, Dept Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 722卷

基金：

欧洲研究理事会; 美国国家科学基金会;

关键词：

Carbon nanotubes; High pressure torsion; Strengthening mechanisms; Grain refinement; METAL-MATRIX COMPOSITES; MECHANICAL-PROPERTIES; POWDER-METALLURGY;

D O I：

10.1016/j.msea.2018.03.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nano-/ultrafine-grained carbon nanotube-reinforced titanium (CNT/Ti) composites were synthesized by ball milling and high pressure torsion (HPT) at room temperature. The effects of the number of HTP rotations and the weight fraction of CNTs on the microstructure, hardness and tensile properties of the CNT/Ti composites were investigated. Transmission electron microscopy (TEM) revealed that elongated grains with an average length of 100-250 nm parallel to the compression axis of HPT and a thickness of 10-25 nm are formed in CNT/Ti composites when CNT contents ranging from 0.3 wt% to 1.0 wt%. With increasing CNT contents, the grain size of Ti is refined, and the microhardness and tensile properties of the composites increase. Evaluating the mechanical properties of the CNT/Ti composites with 0.7 wt% CNTs after 20 rotations indicates a high tensile strength of 872 +/- 5 MPa. C-s-corrected high resolution TEM of the interfaces between Ti and the CNTs after HPT reveals a gradual transition from the lattice planes of hexagonal Ti to those of the CNTs. The strengthening mechanisms are discussed from the aspects of matrix grain refinement, distribution of the CNTs and the CNT-11 interfaces obtained during ball milling and HPT processing.

引用

页码：122 / 128

页数：7

共 28 条

[1] A semi-phenomenological constitutive model for hcp materials as exemplified by alpha titanium [J].

Ahn, Dong-Hyun ;

Kim, Hyoung Seop ;

Estrin, Yuri .

SCRIPTA MATERIALIA, 2012, 67 (02) :121-124

[2] An approach for homogeneous carbon nanotube dispersion in Al matrix composites [J].

Chen, Biao ;

Li, Shufeng ;

Imai, Hisashi ;

Jia, Lei ;

Umeda, Junko ;

Takahashi, Makoto ;

Kondoh, Katsuyoshi .

MATERIALS & DESIGN, 2015, 72 :1-8

[3] A quantitative understanding on the mechanical behaviors of carbon nanotube reinforced nano/ultrafine-grained composites [J].

Dong, Shuhong ;

Zhou, Jianqiu ;

Hui, David .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2015, 101 :29-37

[4] Disassembling single-walled carbon nanotube bundles by dipole/dipole electrostatic interactions [J].

Fugetsu, B ;

Han, WH ;

Endo, N ;

Kamiya, Y ;

Okuhara, T .

CHEMISTRY LETTERS, 2005, 34 (09) :1218-1219

[5] The preparation of double-walled carbon nanotube/Cu composites by spark plasma sintering, and their hardness and friction properties [J].

Guiderdoni, Ch. ;

Estournes, C. ;

Peigney, A. ;

Weibel, A. ;

Turq, V. ;

Laurent, Ch. .

CARBON, 2011, 49 (13) :4535-4543

[6] Interface analysis of ultra-high strength carbon nanotube/nickel composites processed by molecular level mixing [J].

Hwang, J. Y. ;

Lim, B. K. ;

Tiley, J. ;

Banerjee, R. ;

Hong, S. H. .

CARBON, 2013, 57 :282-287

[7] Microstructure and hardness of copper-carbon nanotube composites consolidated by High Pressure Torsion [J].

Jenei, P. ;

Yoon, E. Y. ;

Gubicza, J. ;

Kim, H. S. ;

Labar, J. L. ;

Ungar, T. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (13-14) :4690-4695

[8] The use of flake powder metallurgy to produce carbon nanotube (CNT)/aluminum composites with a homogenous CNT distribution [J].

Jiang, Lin ;

Li, Zhiqiang ;

Fan, Genlian ;

Cao, Linlin ;

Zhang, Di .

CARBON, 2012, 50 (05) :1993-1998

[9] High-temperature properties of extruded titanium composites fabricated from carbon nanotubes coated titanium powder by spark plasma sintering and hot extrusion [J].

Kondoh, Katsuyoshi ;

Threrujirapapong, Thotsaphon ;

Umeda, Junko ;

Fugetsu, Bunshi .

COMPOSITES SCIENCE AND TECHNOLOGY, 2012, 72 (11) :1291-1297

[10] Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes [J].

Kondoh, Katsuyoshi ;

Threrujirapapong, Thotsaphon ;

Imai, Hisashi ;

Umeda, Junko ;

Fugetsu, Bunshi .

COMPOSITES SCIENCE AND TECHNOLOGY, 2009, 69 (7-8) :1077-1081

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