Monolithic aluminium has low density and high conductivity required in transmission conductors. However, it lacks the requisite strength necessary for long space crossing. To augment the strength, it needs to be reinforced with adequate materials. So, this work is focused on spark plasma sintering of Al-CNTs-Nb composite for power transmission conductor core. Spark plasma sintering of the samples was carried out with pre-determined optimum sintering parameters. After the sintering, the density of the sintered samples was calculated using Archimedes principle, while the micro hardness was tested with Vickers hardness tester. The polarisation test was carried out with Autolab (PGSTAT302N), while the electrical conductivity was tested with four-point probe meter. The results gave a 37% improvement in micro hardness and 30% increase in tensile strength with Al-8CNTs-1Nb. Al-1CNTs-4Nb gave the best corrosion characteristics of 51% and 57% improvements in corrosion rates and 443% and 323% improvements in polarisation resistance in NaCl and H2SO4 media, respectively. Electrical conductivity showed a little increase by 2%. In all, it is evident that this composite is a suitable material for power transmission conductor core for upgrading the power grid.
Macgillivray A. What are the links between power, economic growth and job creation? Development impact evaluation, evidence review. A report by Overseas Development Institute (ODI), January 2016.
2.
World Bank. Getting electricity – a pilot indicator set from the doing business project. Washington D.C: Author, 2010.
Yadav V and HarimkarSP. Microstructure and properties of spark plasma sintered carbon nanotube reinforced aluminium matrix composites. J Adv Eng Mater2011; 13: 1128–1134.
5.
YuMFFilesBSArepalliS, et al.Tensile loading of popes of single wall carbon nanotubes and their mechanical properties. Phys Rev Lett2000; 84: 5552.
6.
Starke JrEARashedHMMA. Alloys: aluminium. Mater Sci Mater Eng2017, pp. 18–24.
7.
ThomsonKEJiangDYaoW, et al.Characterization and mechanical testing of alumina-based Nano composites reinforced with niobium and/or carbon nanotubes fabricated by spark plasma sintering. Acta Mater2012; 60: 622–632.
8.
KhalilKA. Ceramic materials: progress in modern ceramics, UK: InTech, 2012, pp. 65–82.
9.
EhsanGAliFMasoudA, et al.Evaluation of microstructure and mechanical properties of Al-TiC metal matrix composite prepared by conventional, microwave and spark plasma sintering methods. Mateials2017; 10: 1255.
10.
SahebN. Spark plasma and microwave sintering of Al6061 and Al2124 alloys. Int J Miner Met Mater2013; 2: 152–159.
11.
DelaizirGBernard-GrangerGMonnierJ, et al.A comparative study of spark plasma sintering (SPS), hot isostatic pressing (HIP) and microwaves sintering techniques on p-type Bi 2 Te 3 thermoelectric properties. Mater Res Bull2012; 47: 1954–1960.
12.
YangMScottVD. Carbide formation in a carbon fibre reinforced aluminium composite. Carbon1991; 29: 877–879.
13.
Al-AqeeliN. Processing of CNTs reinforced Al-Based nanocomposites using different consolidation techniques. J Nanomater2013; 125.
14.
LongBDOthmanRUmemotoM, et al.Spark plasma sintering of mechanically alloyed in situ copper-niobium carbide composite. Alloy J Compd2010; 505: 510–515.
15.
KuritaHKwonHEstiliM, et al.Multi walled carbon nanotube-Aluminium matrix composites prepared by combustion of hetero-agglomeration method, Spark plasma Sintering and hot extrusion. Mater Trans2011; 52: 1960–1965.
16.
UjahCOPopoolaAPIPopoolaOM, et al.Electrical conductivity, mechanical strength and corrosion characteristics of spark plasma sintered Al-Nb nanocomposite. Int J Adv Manuf Technol2018; 1–8.
17.
UllbrandJMCordobaJMTamayo-AriztondoJM, et al.Thermo-mechanical properties of copper-carbon nanofibre composites prepared by spark plasma sintering and hot pressing. Compos Sci Technol2010; 70: 2263–2268.
18.
AjaySVSumankantNMSNarenderMS, et al.Corrosion behavior of aluminium base particulate metal matrix composites: a review. Mater Today2015; 2: 2840–2851.
19.
Abbas MK. Effects of friction stir welding on the microstructure and corrosion behaviour of aluminium alloy AA6061-T651. In Proceedings of the 2nd regional conference on engineering science, Baghdad, Iraq 1–2 December 2010; pp. 291–302.
20.
Loto RT and Babalola P. Corrosion polarization behaviour and microstructural analysis of AA1070 aluminium silicon carbide matrix composites in acid chloride concentrations. Cogent Eng 2017; 4: 1422229.
21.
UjahCOPopoolaAPIPopoolaOM, et al.Optimisation of spark plasma sintering parameters of Al-CNTs-Nb nano-composite using Taguchi design of experiment. Int J Adv Manuf Technol2019; 100: 1563–1573.
22.
ChiehKTe-TanLKuo-HwaT, et al.The influences of powder mixing process on the quality of W-Cu composites. J Trans Canada Soc Mech Eng2009; 33: 3.
23.
ShongweMBDioufSDurowojuMO, et al.Effect of sintering temperature on the microstructure and mechanical properties of Fe30%Ni alloys produced by spark plasma sintering. J Alloys Compd2015; 64: 824–832.
24.
CahoonJRBroughtonWHKutzakAR. The Determination of yield strength from hardness measurements. Metal Trans1983; 2: 1979–1983.
25.
AdebiyiDIPopoolaAPI. Mitigation of abrasive wear damage of Ti–6Al–4V by laser surface alloying. Mater Desgn2015; 74: 67–75.
26.
Callister JrWilliamD. Fundamentals of Materials science and engineering, 2nd ed. USA: John Wiley and sons, 2005, pp. 199.
27.
ZuoYZhouBTangY. Inhibition of AA 2024-T3 corrosion in alkaline nacl solution by compound sodium dodecylbenzenesulfonate and cerium chloride. Int J Electrochem Sci2017; 12: 11137–11149.
28.
MarksLD. Experimental studies of small particle structures. Rep Progr Phys1994; 57: 603–649.
29.
GuoBSongMYIM, et al.Improving the mechanical properties of carbon nanotubes reinforced pure aluminium matrix composites by achieving non-equilibrium interface. J Mater Design2017; 120: 56–65.
30.
ShijoTUmasankarV. Effect on hardness and densification of MWCNT reinforced AA2219 composites sintered in different methods. ARPN J Eng Appl Sci2017; 2: 6.
31.
MuhammadMMuhammadS. Carbon nanotube-reinforced aluminium composite produced by induction melting. J Appl Res Technol2016; 14: 215–224.
32.
LahaTChenYLahiriD, et al.Tensile properties of carbon nanotube reinforced aluminium nanocomposite fabricated by plasma spray forming. J Comp Part A2009; 40: 589–594.
33.
GeorgeRKashyapKTRahulR, et al.Strengthening in carbon nanotube–aluminium (CNT/Al) composites. J Scripta Mater2005; 53: 1159–1163.
34.
OladijoOPObadeleBAVenterAM, et al.Investigating the effect of porosity on corrosion resistance and hardness of WC-Co coatings on metal substrates. African Corr J2016; 2: 1.
35.
RipollMROjalaNKatsichC, et al.The role of niobium in improving toughness and corrosion resistance of high speed steel laser hard facings. Mater Des2016; 99: 509–520.
36.
FengQLiTTengH, et al.Investigation on the corrosion and oxidation resistance of Ni–Al2O3 nano-composite coatings prepared by sediment co-deposition. Surf Coat Technol2008; 202: 4137–4144.
37.
EzuberHEl-HoudAEI-ShaweshF. A study on the corrosion behavior of aluminium alloys in seawater. Mater Design2008; 29: 801–805.
38.
ZakariaHM. Microstructural and corrosion behavior of Al/SiC metal matrix composites. Ain Shams Eng J2014; 5: 831–838.
39.
EveryAGTzouYHasselmanDPH, et al.The effect of particle size on the thermal conductivity of ZnS/diamond composites. Acta Metall Mater1992; 40: 123.
40.
CaoRJiangJXWuC, et al.Effect of addition of Si on thermal and electrical properties of Al-Si-Al2O3 composites. IOP Conf Ser2017; 213: 012001.
