Influence of Soft Phase and Carbon Nanotube Content on the Properties of Hierarchical AZ61 Matrix Composite with Isolated Soft Phase
Tóm tắt
Carbon nanotube-reinforced magnesium matrix (CNTs/Mg) composite has great application potential in the transportation industry, but the trade-off between strength and ductility inhibits its widespread application. In order to balance the strength and plasticity of the composite, in this work, on the basis of the AZ61 matrix composite homogeneously reinforced by Ni-coated CNTs (hard phase), 30 vol.% large-size AZ61 particles are introduced as an isolated soft phase to fabricate hierarchical CNTs/AZ61 composites. The compression tests show the fracture strain and compressive strength of this composite increases by 54% and 8%, respectively, compared with homogeneous CNTs/AZ61 composite. During deformation, the hard phase is mainly responsible for bearing the load and bringing high strength, due to the precipitation of the Mg17Al12 phase, uniformly dispersed CNT and strong interfacial bonding of the CNTs/Mg interface through nickel plating and interfacial chemical reaction. Furthermore, the toughening of the soft phase results in high ductility. With the increase in CNT content, the compressive strength of composites is nearly unchanged but the fracture strain gradually decreases due to the stress concentration of CNT and its agglomeration.
Từ khóa
Tài liệu tham khảo
Hou, 2020, Combination of enhanced thermal conductivity and strength of MWCNTs reinforced Mg-6Zn matrix composite, J. Alloys Compd., 838, 155573, 10.1016/j.jallcom.2020.155573
Abazari, 2022, Functionalized carbon nanotube-encapsulated magnesium-based nanocomposites with outstanding mechanical and biological properties as load-bearing bone implants, Mater. Des., 213, 110354, 10.1016/j.matdes.2021.110354
Hou, 2019, Significantly enhancing the strength + ductility combination of Mg-9Al alloy using multi-walled carbon nanotubes, J. Alloys Compd., 790, 974, 10.1016/j.jallcom.2019.03.243
Shirasu, 2019, How do the mechanical properties of carbon nanotubes increase? An experimental evaluation and modeling of the engineering tensile strength of individual carbon nanotubes, Mater. Res. Express, 6, 55047, 10.1088/2053-1591/ab069f
Ding, Y., Shi, Z., Li, Z., Jiao, S., Hu, J., Wang, X., Zhang, Y., Wang, H., and Guo, X. (2022). Effect of CNT Content on Microstructure and Properties of CNTs/Refined-AZ61 Magnesium Matrix Composites. Nanomaterials, 12.
Luo, 2022, Evading strength and ductility trade-off in an inverse nacre structured magnesium matrix nanocomposite, Acta Mater., 228, 117730, 10.1016/j.actamat.2022.117730
Xiang, 2019, Achieving ultra-high strengthening and toughening efficiency in carbon nanotubes/magnesium composites via constructing micro-nano layered structure, Compos. Part. A-Appl. S., 119, 225, 10.1016/j.compositesa.2019.02.006
Liu, 2015, High performance heterogeneous magnesium-based nanocomposite, Mater. Lett., 143, 287, 10.1016/j.matlet.2014.12.099
Ding, 2020, High performance carbon nanotube-reinforced magnesium nanocomposite, Mat. Sci. Eng. A, 771, 1, 10.1016/j.msea.2019.138575
Suryanarayana, 2006, Mechanical alloying and milling, Prog. Mater. Sci., 46, 1, 10.1016/S0079-6425(99)00010-9
Miao, 2018, Interphase boundary segregation of silver and enhanced precipitation of Mg17Al12 Phase in a Mg-Al-Sn-Ag alloy, Scripta Mater., 154, 192, 10.1016/j.scriptamat.2018.05.047
Varin, 2003, The effect of MgNi2 intermetallic compound on nanostructurization and amorphization of Mg–Ni alloys processed by controlled mechanical milling, J. Alloys Compd., 354, 281, 10.1016/S0925-8388(03)00016-1
Wu, 2018, Synergistic effect of carbon nanotube and graphene nanoplatelet addition on microstructure and mechanical properties of AZ31 prepared using hot-pressing sintering, J. Mater. Res., 33, 4261, 10.1557/jmr.2018.421
Habibi, 2011, Enhanced compressive response of hybrid Mg-CNT nano-composites, J. Mater. Sci., 46, 4588, 10.1007/s10853-011-5358-2
Rashad, 2014, Synergetic effect of graphene nanoplatelets (GNPs) and multi-walled carbon nanotube (MW-CNTs) on mechanical properties of pure magnesium, J. Alloys Compd., 603, 111, 10.1016/j.jallcom.2014.03.038
Ng, 2010, Influence of fibre taper on the work of fibre pull-out in short fibre composite fracture, J. Mater. Sci., 45, 1086, 10.1007/s10853-009-4050-2
Huq, 2008, On defect interactions in axially loaded single-walled carbon nanotubes, J. Appl. Phys., 103, 1624, 10.1063/1.2837835
Huq, 2010, Defect-defect interaction in single-walled carbon nanotubes under torsional loading, Int. J. Mod. Phys. B, 24, 1215, 10.1142/S021797921005510X
Luo, 2021, Heterogeneous magnesium matrix nanocomposites with high bending strength and fracture toughness, J. Alloys Compd., 855, 157359, 10.1016/j.jallcom.2020.157359
Hassan, 2006, Effect of particulate size of Al2O3 reinforcement on microstructure and mechanical behavior of solidification processed elemental Mg, J. Alloys Compd., 419, 84, 10.1016/j.jallcom.2005.10.005