Properties and structure of magnesium matrix composite reinforced with CNTs

Abstract

By using high pure Magnesium (99.9 wt%) as matrix and multi-walled bended carbon nanotubes (CNTs) as reinforced phase, carbon nanotubes/magnesium matrix composite was prepared by the foundry method under the argon gas protection, and its mechanical properties were tested. The interface structure and component of plating and un-plating carbon nanotubes were analyzed by TEM and EDS, and the action mechanism was discussed. The experiment results show that the CNTs can strengthen mechanical properties of the nanotube-reinforced Mg matrix composite, the tensile strength and elongation ratio are greatly improved. Furthermore, the plating CNTs are better than un-plating CNTs in strengthening effects. The tensile strength is inereased by 150% and the elongation ratio is increased by 30% than that of matrix when content of CNTs is 0.67 wt%.

Keywords

carbon nanotubes / Mg-based composites / properties / microstructure

References

[1] Chang-xu Shi, Heng-de Li, Dian-zuo Wang, . A Proposal or Accelerating Development of Metallic Magnesium Industry in China. Materials Review, 2001, 15(4): 5-6. (in Chinese)

[2] Wei-xiang Chen, Wen-lu Chen, Zhu-de Xu, . Characteristics of Carbon Nanotubes and High-quality Composites. ACTA Materiae Compositae Sinica, 2001, 18(4): 1-5. (in Chinese)

[3] Rong-chang Zeng, Wei Ke, Yong-bo Xu, . The Recent Development and Application of Magnesium Alloy. ACTA Metallurgica Sinica, 2001, 37(7): 673-684. (in Chinese)

[4] Jian Zhou, Jianhua Wang, Runzhang Yuan, . The Effect of Diamond Film Nucleation and Growth in Different Substrate Pretreatment Methods. Journal of Wuhan University of Technology-Mater. Sci. Ed., 1999, 14(3): 49-52.

[5] Jian Zhou, Wei He, Runzhang Yuan, . Emission Spectra of Microwave Plasma and MPCVD Transparent Diamond Film. Transactions of Nonferrous Metals Society of China, 2000, 10(4): 501-503.

[6] Li-de Zhang, Ji-mei Mou. Nanomaterials and Nano Structure, 2001 Beijing: Science Press. 27-30. (in Chinese)

[7] Vedani M, Gariboldi E, Silva G, . Influence of Interface Properties on Mechanical Behaviour of Particle Reinforced Metal Matrix Composite. Mater Sci Technol, 1994, 10(2): 132-140.

[8] Wagner H D, Lourie O, Feldman Y, . Stress-induced Fragmentation of Multiwall Carbon Nanotubes in a Polymer Matrix. Appl Phys Lett, 1998, 72(2): 188-190.

[9] Schadler L S, Giannaris S C, Ajayan P M. Load Transfer in Carbon Nanotube Epoxy Composites. Appl Phys Lett, 1998, 73(26): 3842-3844.

[10] Ying Su, Guo-ding Zhang, Hui-ming Wang, . Properties and Structure of SiC_w+B₄C_p/MB15 Magnesium Matrix Composite. Journal of Materials Engineering, 1996, 9: 9-13. (in Chinese)

[11] Cheng Guo, Ru Chen, Chun-yang Shang, . Mechanisms on Fracture and Strengthening Mechanism of Aluminum Alloy Matrix Composite Reinforced with SiC Particles. ACTA Materae Compositae Sinica, 2001, 18(4): 54-57. (in Chinese)

[12] Zhi-kun Zhang, Zuo-lin Cui. Nanometre Technique and Nanomaterials, 2000 Beijing: National Defence Industry Press. (in Chinese)