Development of Aluminium-Nickel Coated Short Carbon Fiber Metal Matrix Composites

Kumar, Nithin; Chittappa, H. C.; Vannan, S. Ezhil

doi:10.1016/j.matpr.2018.02.100

Cited by 17 publications

(11 citation statements)

References 11 publications

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“…Recently, carbon-based reinforcements have been used to impart improvements in the properties of Al-MMCs [ 19 ]. Carbon materials such as carbon fibers [ 20 , 21 ], graphite [ 22 , 23 ], carbon nanotubes (CNTs) [ 24 , 25 ], graphene (G) [ 26 , 27 ] and graphene oxide (GO) [ 28 , 29 ] have been used as reinforcements in Al-MMCs. In graphene-reinforced aluminum matrix nanocomposites, an improvement of 79, 49 and 44% in yield strength, ultimate strength, and Vickers hardness have been reported with 1 wt.% GO addition, and the increase in GO content has led to grain refinement of the composite [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

et al. 2021

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Aluminum matrix composites are among the most widely used metal matrix composites in several industries, such as aircraft, electronics, automobile, and aerospace, due to their high specific strength, durability, structural rigidity and high corrosion resistance. However, owing to their low hardness and wear resistance, their usage is limited in demanding applications, especially in harsh environments. In the present work, aluminum hybrid nanocomposite reinforced with alumina (Al2O3) and graphene oxide (GO) possessing enhanced mechanical and thermal properties was developed using spark plasma sintering (SPS) technique. The focus of the study was to optimize the concentration of Al2O3 and GO content in the composite to improve the mechanical and thermal properties such as hardness, compressive strength, heat flow, and thermal expansion. The nanocomposites were characterized by FESEM, EDS, XRD and Raman spectroscopy to investigate their morphology and structural properties. In the first phase, different volume percent of alumina (10%, 20%, 30%) were used as reinforcement in the aluminum matrix to obtain (Al+X% Al2O3) composite with the best mechanical/thermal properties which was found to be 10 V% of Al2O3. In the second phase, a hybrid nanocomposite was developed by reinforcing the (Al + 10 V% Al2O3) with different weight percent (0.25%, 0.5%, 1%) of GO to obtain the optimum composition with improved mechanical/thermal properties. Results revealed that the Al\10 V% Al2O3\0.25 wt.% GO hybrid nanocomposite showed the highest improvement of about 13% in hardness and 34% in compressive strength as compared to the Al\10V% Al2O3 composite. Moreover, the hybrid nanocomposite Al\10 V% Al2O3\0.25 wt.% GO also displayed the lowest thermal expansion.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

et al. 2021

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“…The strength of silica fume doped cement after 28 days is higher than that of the base cement. The strength generated by one hundred grams of silica fume is equivalent to the strength produced by 200–500 grams of cement [ 15 , 31 ].…”

Section: Resultsmentioning

confidence: 99%

Influences of molding processes and different dispersants on the dispersion of chopped carbon fibers in cement matrix

Wang

Peng

et al. 2018

Heliyon

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Chopped carbon fiber-reinforced cement composite (CFRC) has become one of the potential smart materials in recent years. The key process of preparing this kind of composite at the early stage is how to disperse carbon fibers evenly into the cement matrix to achieve CFRC composite with good properties. In this study, a three-step mixing process and a six-step mixing process for the preparation of CFRC were suggested, respectively. The fracture morphology was observed by scanning electron microscopy. The influence of mass fractions of three common dispersants methyl cellulose (MC), carboxymethyl cellulose sodium (CMC) and hydroxyethyl cellulose (HEC) on the dispersion of short carbon fibers in water under certain temperature was investigated prior to the manufacture of CFRC. The correlation between mass fraction and viscosity was discussed, and the dispersion effect was assessed from the structure of dispersants and molding process. A hypothetical capsule theory was proposed to reasonably explain the dispersion effect of MC, CMC, and HEC. The experiments showed that pre-dispersion by ultrasonic vibration improved the dispersion of carbon fibers greatly. The dispersivity of carbon fibers was closely related to the category and mass fractions of dispersants. With the same mass fraction of dispersants at a certain temperature, the dispersion effect was in order of HEC > CMC > MC. Meanwhile, when the mass fraction of HEC was between 0.6 and 0.8 wt% by weight of cement and the mass fraction in the aqueous solution was between 1.65 and 1.80 wt%, carbon fibers dispersed most ideally and distributed further uniformly in the cement matrix.

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“…This reaction damages the fibers severely and alters the Impact Factor (JCC): 7.6197 mechanical properties of the fiber and composites harmful reaction at the interface of the matrix and Magnesium (Mg) is a very good surfactant. Addition of Mg to the aluminium mel lower surface tension of magnesium [11]. An optimum amount of Mg The melting point of nickel is about 1455°C.…”

Section: Introductionmentioning

confidence: 99%

“…good surfactant. Addition of Mg to the aluminium melt improves its wettability because of the lower surface tension of magnesium[11]. An optimum amount of Mg is required during the preparation of the composites.…”

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confidence: 99%

Effect of T6 Heat Treatment on Hardness Wear and Fatigue Behaviour of Nickel Coated Carbon Fiber Reinforced Al-7079 MMC

Somayaji¹,

Tjprc²

2019

IJMPERD

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Aluminum metal matrix composites are preferred over other conventional materials in the field of aerospace, marine and automotive applications due to their improved tribological and mechanical properties and increased strength to weight ratio. As reinforcement carbon fiber is a very promising material and carbon fibers increase the wear resistance and also reduce the friction coefficient of AMCs. Al 7079 consists of zinc as the major alloying element which has good fatigue strength and is strong, but has average machinability. But T6 heat treatment improves its machinability and also increases its hardness. This paper presents electroless nickel coating to coat the carbon fibers with nickel. These coated fibers are then mixed with aluminium 7079 alloy by stir casting technique. The casted AMC was subjected to T6 heat treatment and hardness, wear and fatigue property of the composite was evaluated.

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Development of Aluminium-Nickel Coated Short Carbon Fiber Metal Matrix Composites

Cited by 17 publications

References 11 publications

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

Mechanical and Thermal Evaluation of Aluminum Hybrid Nanocomposite Reinforced with Alumina and Graphene Oxide

Influences of molding processes and different dispersants on the dispersion of chopped carbon fibers in cement matrix

Effect of T6 Heat Treatment on Hardness Wear and Fatigue Behaviour of Nickel Coated Carbon Fiber Reinforced Al-7079 MMC

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