Effect of potential difference between nano-Al₂O₃ whisker and Mg matrix on the dispersion of Mg composites

Abstract

The potential difference between positive and negative ions was utilized to improve the homogenized dispersion of nanoscale Al₂O₃ whiskers in Mg matrix composites. The Mg powders were decorated with sodium dodecylbenzene sulfonate (C₁₈H₂₉NaO₃S, SDBS) and were introduced to the cathode group on their surface. The Al₂O₃ whiskers were modified by the cetyl trimethyl ammonium bromide (C₁₉H₄₂BrN, CTAB) and were featured in the anode group. The suitable contents of CTAB and SDBS, the application atmosphere, and the type of solvents were investigated. Dispersion results showed that adding 2wt% SDBS into Mg powders and adding 2wt% CTAB into Al₂O₃ whiskers promoted the formation of more uniformly mixed composite powders, compared to those of conventional ball milling via scanning electron microscopy (SEM) analysis. Meanwhile, the calculated results derived from first-principle calculations also demonstrated the stronger cohesion between Al₂O₃ whisker reinforcements and Mg matrix than undecorated composite powders. After preparation by powder metallurgy, the morphology, grain size, hardness, and standard deviation coefficient of composites were analyzed to evaluate the dispersed efficiency. The results indicated that the modification of homogenized dispersed Al₂O₃ whiskers in composites contributed to the refinement of 26% in grain size and the improvement of 20% in hardness compared with pure Mg, and the reduction of 32.5% in the standard deviation coefficient of hardness compared with the ball-milling sample.

Keywords

magnesium-based composites / Al₂O₃ whiskers / potential difference / dispersion

References

[1] Karthick E, Mathai J, Tony JM, Marikkannan SK. Processing, microstructure and mechanical properties of Al₂O₃ and SiC reinforced magnesium metal matrix hybrid composites. Mater. Today Proc., 2017, 4(6): 6750.

[2] Wu YW, Wu K, Deng KK, et al. Effect of extrusion temperature on microstructures and damping capacities of Grp/AZ91 composite. J. Alloys Compd., 2010, 506(2): 688.

[3] B. Lei, B. Jiang, H.B. Yang, et al., Effect of Nd addition on the microstructure and mechanical properties of extruded Mg—Gd—Zr alloy, Mater. Sci. Eng. A, 816(2021), art. No. 141320.

[4] Yang HB, Wu L, Jiang B, et al. Clarifying the roles of grain boundary and grain orientation on the corrosion and discharge processes of α-Mg based Mg—Li alloys for primary Mg-air batteries. J. Mater. Sci. Technol., 2021, 62, 128.

[5] Biomed. Mater., 2018, 13(2) art. No. 022001

[6] Su JL, Teng J, Xu ZL, Li Y. Biodegradable magnesium-matrix composites: A review. Int. J. Miner. Metall. Mater., 2020, 27(6): 724.

[7] Liu WJ, Jiang B, Xiang HC, et al. High-temperature mechanical properties of as-extruded AZ80 magnesium alloy at different strain rates. Int. J. Miner. Metall. Mater., 2022, 29(7): 1373.

[8] He C, Zhang YB, Yuan M, et al. Improving the room-temperature bendability of Mg—3Al—1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation. Int. J. Miner. Metall. Mater., 2022, 29(7): 1322.

[9] H. Yang, X.H. Chen, G.S. Huang, et al., Microstructures and mechanical properties of titanium-reinforced magnesium matrix composites: Review and perspective, J. Magnes. Alloys, 2022. https://doi.org/10.1016/j.jma.2022.07.008

[10] Liang JH, Li HJ, Qi LH, et al. Fabrication and mechanical properties of CNTs/Mg composites prepared by combining friction stir processing and ultrasonic assisted extrusion. J. Alloys Compd., 2017, 728, 282.

[11] Xie HM, Wei YY, Jiang B, Tang CP, Nie CY. Tribological properties of carbon nanotube/SiO₂ combinations as water-based lubricant additives for magnesium alloy. J. Mater. Res. Technol., 2021, 12, 138.

[12] Meng LL, Hu XS, Wang XJ, et al. Graphene nanoplatelets reinforced Mg matrix composite with enhanced mechanical properties by structure construction. Mater. Sci. Eng. A, 2018, 733, 414.

[13] Jabbarzare S, Bakhsheshi-Rad HR, Nourbakhsh AA, Ahmadi T, Berto F. Effect of graphene oxide on the corrosion, mechanical and biological properties of Mg-based nanocomposite. Int. J. Miner. Metall. Mater., 2022, 29(2): 305.

[14] Xiao P, Gao YM, Xu FX, et al. An investigation on grain refinement mechanism of TiB₂ particulate reinforced AZ91 composites and its effect on mechanical properties. J. Alloys Compd., 2019, 780, 237.

[15] Zheng MY, Wu K, Yao CK. Effect of interfacial reaction on mechanical behavior of SiCw/AZ91 magnesium matrix composites. Mater. Sci. Eng. A, 2001, 318(1–2): 50.

[16] H. Tsukamoto, Enhancement of mechanical properties of SiCw/SiCp-reinforced magnesium composites fabricated by spark plasma sintering, Results Mater., 9(2021), art. No. 100167.

[17] Zhang XP, Wang HX, Bian LP, et al. Microstructure evolution and mechanical properties of Mg—9Al—1Si—1SiC composites processed by multi-pass equal-channel angular pressing at various temperatures. Int. J. Miner. Metall. Mater., 2021, 28(12): 1966.

[18] Yu YC, Tang SW, Wang ZL, Hu J. Effects of coating contents on the interfacial reaction and tensile properties of Al₂O₃ coated-A1₁₈B₄O₃₃w/Al—Mg matrix composites. Mater. Charact., 2015, 107, 327.

[19] Zeng XS, Liu Y, Huang QY, Zeng G, Zhou GH. Effects of carbon nanotubes on the microstructure and mechanical properties of the wrought Mg—2.0Zn alloy. Mater. Sci. Eng. A, 2013, 571, 150.

[20] Yuan QH, Zhou GH, Liao L, Liu Y, Luo L. Interfacial structure in AZ91 alloy composites reinforced by graphene nanosheets. Carbon, 2018, 127, 177.

[21] Xiao P, Gao YM, Xu FX, et al. Tribological behavior of in situ nanosized TiB₂ particles reinforced AZ91 matrix composite. Tribol. Int., 2018, 128, 130.

[22] Y.P. Zhu, P.P. Jin, W.D. Fei, S.C. Xu, and J.H. Wang, Effects of Mg₂B₂O₅ whiskers on microstructure and mechanical properties of AZ31B magnesium matrix composites, Mater. Sci. Eng. A, 684(2017), p. 205.

[23] Arai S, Suzuki Y, Nakagawa J, Yamamoto T, Endo M. Fabrication of metal coated carbon nanotubes by electroless deposition for improved wettability with molten aluminum. Surf. Coat. Technol., 2012, 212, 207.

[24] Tucho WM, Mauroy H, Walmsley JC, Deledda S, Holmestad R, Hauback BC. The effects of ball milling intensity on morphology of multiwall carbon nanotubes. Scripta Mater., 2010, 63(6): 637.

[25] Yu H, Sun Y, Hu LX, Wan ZP, Zhou HP. The effect of Ti addition on microstructure evolution of AZ61 Mg alloy during mechanical milling. J. Alloys Compd., 2017, 704, 537.

[26] Estili M, Kawasaki A. An approach to mass-producing individually alumina-decorated multi-walled carbon nanotubes with optimized and controlled compositions. Scripta Mater., 2008, 58(10): 906.

[27] Materials, 2017, 10(10) art. No. 1192

[28] Zuo F, Meng F, Lin DT, et al. Influence of whisker-aspect-ratio on densification, microstructure and mechanical properties of Al₂O₃ whiskers-reinforced CeO₂-stabilized ZrO₂ composites. J. Eur. Ceram. Soc., 2018, 38(4): 1796.

[29] Corrochano J, Cerecedo C, Valcárcel V, Lieblich M, Guitián F. Whiskers of Al₂O₃ as reinforcement of a powder metallurgical 6061 aluminium matrix composite. Mater. Lett., 2008, 62(1): 103.

[30] Qu XY, Wang FC, Shi CS, et al. In situ synthesis of a gamma-Al₂O₃ whisker reinforced aluminium matrix composite by cold pressing and sintering. Mater. Sci. Eng. A, 2018, 709, 223.

[31] Wang L, Fu QG, Zhao FL. Improving oxidation resistance of MoSi₂ coating by reinforced with Al₂O₃ whiskers. Intermetallics, 2018, 94, 106.

[32] Zhang HW, Zhu DG, Grasso S, Hu CF. Tunable morphology of aluminum oxide whiskers grown by hydrothermal method. Ceram. Int., 2018, 44(13): 14967.

[33] Zhu DS, Li XF, Wang N, Wang XJ, Gao JW, Li H. Dispersion behavior and thermal conductivity characteristics of Al₂O₃—H₂O nanofluids. Curr. Appl. Phys., 2009, 9(1): 131.

[34] Clark SJ, Segall MD, Pickard CJ, et al. First principles methods using CASTEP. Z. Kristallogr., 2005, 220(5–6): 567.

[35] Marlo M, Milman V. Density-functional study of bulk and surface properties of titanium nitride using different exchange-correlation functionals. Phys. Rev. B, 2000, 62(4): 2899.

[36] Wang XJ, Zhu DS, Yang S. Investigation of pH and SDBS on enhancement of thermal conductivity in nanofluids. Chem. Phys. Lett., 2009, 470(1–3): 107.

[37] Chen PL, Zhong ZX, Liu F, Xing WH. Cleaning ceramic membranes used in treating desizing wastewater with a complex-surfactant SDBS-assisted method. Desalination, 2015, 365, 25.

[38] Tan XL, Fang M, Chen CL, Yu SM, Wang XK. Counterion effects of nickel and sodium dodecylbenzene sulfonate adsorption to multiwalled carbon nanotubes in aqueous solution. Carbon, 2008, 46(13): 1741.

[39] S.L. Xiang, X.J. Wang, M. Gupta, K. Wu, X.S. Hu, and M.Y. Zheng, Graphene nanoplatelets induced heterogeneous bimodal structural magnesium matrix composites with enhanced mechanical properties, Sci. Rep., 6(2016), art. No. 38824.

[40] Nevarez-Rascon A, Aguilar-Elguezabal A, Orrantia E, Bocanegra-Bernal MH. Compressive strength, hardness and fracture toughness of Al₂O₃ whiskers reinforced ZTA and ATZ nanocomposites: Weibull analysis. Int. J. Refract. Met. Hard Mater., 2011, 29(3): 333.

[41] Saravanan RA, Surappa MK. Fabrication and characterisation of pure magnesium—30 vol.% SiCp particle composite. Mater. Sci. Eng. A, 2000, 276(1–2): 108.

[42] BMJ, 2005, 331(7521) art. No. 903