Spark plasma sintering of graphite–aluminum powder reinforced with SiC/Si particles

Durowoju, Mondiu Ọlayinka; Sadiku, Rotimi; Diouf, S.; Shongwe, Mxolisi Brendon; Olubambi, P. A.

doi:10.1016/j.powtec.2015.07.027

Cited by 33 publications

(17 citation statements)

References 34 publications

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“…The unreinforced GrÀAl and GrÀAl reinforced with 10 % TiB 2 both have almost similar displacement rate patterns, while 5 % and 15 % TiB 2 additions also have same patterns. The same ob-servations were reported by other researchers while addeding ZrB 2 to GrÀAl [3]. A change in the particle rearrangement peaks with time can also be observed for nano TiB 2 particle additions as the heating rate increases from 100 8C/min to 150 8C/min, Figure 4c, d. It was also noticed that the sintering process stopped before the commencement of the cooling process at 15 % addition of nano TiB 2 for the 100 8C/min heating rate.…”

Section: Displacement Ratesupporting

confidence: 86%

“…Graphite-aluminum composites find applications in automobile, aerospace and construction industries because of their low density, wear and corrosion resistance, low thermal coefficient of expansion and high strength to cost ratio as compared to conventional alloys. Researchers have recently started investigating the use of ceramic materials such as SiC, TiC, TiB 2 , ZrB 2 , AlN, Si 3 N 4 and Al 2 O 3 as additives to further increase their properties [2][3][4]. In many applications, such as bearings and engine blocks, aluminum alloys may be subjected to tribological conditions leading to wear [5].…”

Section: Introductionmentioning

confidence: 99%

“…Recently there has been great interest in producing composites with TiB 2 as a reinforcing phase as the excellent mechanical properties of TiB 2 enhance the overall performance of the composites [4]. TiB 2 has been reported to exhibit a melting point of 3 225 8C, low density (4.52 g/cm 3 ), high hardness (25 GPa-35 GPa) and elastic modulus (> 570 GPa), excellent thermal conductivity (60 Wm À1 K À1 -120 Wm À1 K À1 ) along with low electrical resistivity (10 10 6 W ·cm-30 · 10 6 W · cm). These characteristics make it a candidate material for use as ultra-high temperature ceramics (UHTCs) and in armour applications, cutting tools, electrode materials, heating elements and as a reinforcement in metal matrix and ceramic matrix composites [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering

Durowoju

Sadiku

Diouf

et al. 2019

Materialwissenschaft Werkst

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The demand for lightweight materials in the automobile and aerospace industries has led to various researches on graphite and graphite‐aluminum composites. The aim of this study was to investigate the effect of the addition of micron/nano TiB2 particles on the properties of graphite‐aluminum composite particularly the wear resistance. The powders were sintered at 550 °C and 50 MPa with more attention on the effect of the sintering temperature on densification, microhardness, coefficient of thermal expansion, wear and frictional force. The results show that the addition of nano TiB2 reduces the densification while improving the hardness of Gr−Al composite with the lowest value being 96.0 % of relative density and the highest microhardness of 43.58 HV 0.1. The coefficient of thermal expansion and frictional force of the composite materials increases with increasing TiB2 content and heating rate (100 °C/min–150 °C/min). TiB2 particles enhance the wear resistance of graphite‐aluminum composite. The addition of micro/nanoparticles of TiB2 to graphite‐aluminum composite increases its corrosion rate with improved passivation behavior in 3.5 wt.% NaCl solution. Nevertheless, 5 wt.% nano (100 °C/min) TiB2 additions do not affect the overall corrosion rate. This work has shown that we can take advantage of some of the properties of TiB2 to improve the performance of graphite‐aluminum composite.

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Section: Displacement Ratesupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering

Durowoju

Sadiku

Diouf

et al. 2019

Materialwissenschaft Werkst

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“…However,they are seldom used lately due to the harsh, fluctuating and high operating conditions that aerospace materials are subjected to in service [2].Hence, this pressing demand for high strength and lightweight materials hasinspired researchers to find alternative materials for Al and its alloys in aerospace applications [3].…”

Section: Introductionmentioning

confidence: 99%

Spark plasma sintering of graphitized multi-walled carbon nanotube reinforced Ti6Al4V

et al. 2017

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Graphitized multi-walled carbon nanotubes (MWCNTGr) reinforced Ti6Al4V (Ti64) matrix composites prepared via thepowder metallurgy route were synthesized by spark plasma sintering (SPS) technique. 1, 2 and 3 wt % MWCNTGr were dispersed in the Ti64 matrices by adapted high energy ball milling (HEBMA). Composite powder mixtures were sintered in vacuum at constant applied pressure, heating rate and isothermal holding time of 50 MPa, 100 °C/min and 5 min respectively. Thesintering temperature was varied between 850 and 1000 °C.Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD)were used to characterize the as-received MWCNTs, MWCNTGr, admixed composite powders and the bulk sintered composites. MWCNTGr evolution during graphitization treatment, dispersion in Ti64 matrix and in the sintered composites was analyzed using the characteristic Raman peak intensity ratio (ID/IG). The relative density of the sintered MWCNTGr/Ti64 composites was enhanced with increased sintering temperature, but deteriorated with increased wt % MWCNTGr in the metal matrix. Vickers microhardness of the consolidated composites improved with increasing sintering temperature and weight fractions of MWCNTGr over that of the unreinforced matrix alloy.The formation of crystalline TiC interfacial product during composite powder processing and consolidationis also discussed.

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“…However, different powdered materials with immiscibility of phases in their solid states should be prepared/fabricated employing powder metallurgy [2,18], hence the use of powder metallurgy route, with spark plasma sintering technique in this study. Spark plasma sintering technique has a lot of advantages over the conventional powder consolidation technique, which includes: fast sintering, lower sintering time with temperature, minimized grain coarsening, prevention of unnecessary reactions between the different phases, effective consolidation, and production of near net-shaped materials [2,[19][20][21][22][23]. In the spark plasma sintering technique, the total punch displacement of the powders is affected by the following parameters such as; the applied pressure, reaction of the products, graphite foil, heating behavior, sintering temperature, and time [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

et al. 2020

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This work investigated the effect of the sintering temperatures on the densification of the powders, density, relative density, microhardness, coefficient of thermal expansion, and corrosion resistance in sulphuric acid solution environment of copper-niobium-titanium di-boride composite. A 90% weight of copper, reinforced with a 6% weight of niobium micro-particles and 4% weight of titanium-diboride was prepared in powdered form and sintered in two different temperatures of 650 °C and 700 °C using the spark plasma sintering method. The crystal phases and the morphologies of both the starting powders and the sintered samples were analyzed by the use of X-ray diffraction with copper Alpha-K radiation and scanning electron microscopy with energy dispersive X-ray spectroscopy. The results show that sintering at a temperature of 700 °C reduced the displacement rate of the powders with a higher microhardness value of 941 MPa when compared with the sintering temperature of 650 °C, which prolonged the displacement rate of the powders with a lower microhardness value of 827 MPa. The sintered samples recorded negative thermal expansion values of − 1.375 × 10 −5 °C −1 and − 7.780 × 10 −6 °C −1 at temperatures of 650 °C and 700 °C, respectively. The sample sintered at 700 °C has better micro-hardness and better corrosion resistance in a sulphuric acid environment when compared to the one sintered at 650 °C. This study has shown that the varying of the sintering temperatures has an effect on the properties of the composite under study. The produced composites can be used to control the mechanical and electrical properties, and the thermal expansion of functional materials, such as superconductors, semiconductors, ferroelectrics, magnetic and Mott insulators, etc. Keywords Copper-metal matrix composites spark plasma sintering • Microstructure • Negative thermal expansion • Corrosion in sulphuric acid * Azunna Agwo Eze,

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Spark plasma sintering of graphite–aluminum powder reinforced with SiC/Si particles

Cited by 33 publications

References 34 publications

Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering

Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering

Spark plasma sintering of graphitized multi-walled carbon nanotube reinforced Ti6Al4V

Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

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Spark plasma sintering of graphite–aluminum powder reinforced with SiC/Si particles

Cited by 33 publications

References 34 publications

Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB2 via spark plasma sintering

Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB2 via spark plasma sintering

Spark plasma sintering of graphitized multi-walled carbon nanotube reinforced Ti6Al4V

Effect of sintering temperatures on the properties of in-situ copper-niobium-titanium di-boride composites

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Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering

Wear and corrosion studies of graphite‐aluminum composite reinforced with micro/nano‐TiB₂ via spark plasma sintering