Effect of carbon black on mechanical properties of Al7075/Al2O3/B4C reinforced aluminum composite

Khare, Manu; Gupta, Ravi Kant; Ghosh, S. S.; Chhabra, Deepak

doi:10.1016/j.matpr.2020.04.803

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…where ρ exp is the experimental density of MMCs in g/c.c., m 1 is the mass of MMCs measured in air, m 2 is the mass of MMCs measured in distilled water, and ρ w is the density of distilled water (1 g cm −3 ) Theoretical density of composites can be determined through the rule of mixture, which takes into account the density of the matrix-metal and the density of reinforcements, considering their respective volume fractions, as depicted in equation (2). The relation between porosity and density for each developed composite was calculated as per equation Figure 3 presents data on four Al-7075 MMCs samples (B1, B2, B3, and B4) with varying compositions of aluminum alloy (Al-7075), boron carbide (B 4 C), and CSC.…”

Section: Density and Porosity Measurementmentioning

confidence: 99%

“…In particular, aluminum-based MMCs have attracted special interest due to their high specific strength, low density, and excellent machinability. Moreover, the incorporation of ceramic reinforcements such as silicon carbide (SiC) [1], alumina (Al 2 O 3 ) [2], boron nitride strength and wear resistance of the composite as the volume percentage of CSA increased compared to that of the base alloy.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of coconut shell charcoal and boron carbide/zirconium dioxide in aluminium 7075 matrix composites under varying operating conditions: a comparative analysis

Silambarasan,

Karthikeyan

2023

Mater. Res. Express

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This study focused on investigating the influence of varying weight percentages of coconut shell charcoal (CSC) on the physical, mechanical, and wear properties of aluminum 7075 (Al-7075) matrix composites reinforced by boron carbide (B4C) and zirconium dioxide (ZrO2). Throughout the study, these composites were prepared with a constant 3 wt% B4C/ZrO2. The developed composites were then subjected to the tribological analysis using a pin-on-disc apparatus under a constant sliding speed (2000 m), a sliding distance (4 m s−1), and varying operating temperatures (room temperature, 150, 200, and 250 °C). The worn-out surfaces of the composites were examined using a magnified scanning electron microscope (SEM) to investigate the microstructural analysis and wear behavior. The composites containing 3% B4C/ZrO2 and 3% CSC exhibited the highest hardness and wear resistance among the studied composites. The incorporation of CSC increased the density and porosity of the composites up to a 3 wt%, but at 4 wt%, a decrease was observed. It is worth noting that the B-series samples had slightly lower hardness values compared to the Z-series samples. Regarding the effect of temperature, the wear rate decreased as the temperature increased. The Al-7075/ZrO2/CSC composite demonstrated improved wear resistance and coefficient of friction (COF) compared to the Al-7075/B4C/CSC composite, with respective enhancements of 19.30% and 42.19%. The analysis of variance (ANOVA) confirmed the significant impact of CSC weight fraction on wear for both composites, whereas only the Al-7075/ZrO2/CSC composites showed significance for COF. The SEM analysis revealed that the addition of CSC resulted in a uniform distribution of particles within the matrix, leading to improved wear resistance. Therefore, this study demonstrated that the addition of CSC influenced the density, porosity, hardness, wear resistance, and COF in the Al-7075 matrix composites. Optimal performance was achieved with a 3 wt% CSC for Al-7075/ZrO2/CSC at 250 °C. The composites developed in this study, comprising boron carbide (B4C)- and zirconium dioxide (ZrO2)-reinforced aluminum 7075 (Al-7075) matrix with varying weight percentages of CSC, have several potential applications such as in the fields of automotive, aerospace, defense, and industrial machinery.

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Section: Density and Porosity Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of coconut shell charcoal and boron carbide/zirconium dioxide in aluminium 7075 matrix composites under varying operating conditions: a comparative analysis

Silambarasan,

Karthikeyan

2023

Mater. Res. Express

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“…CB was used as an additive to increase the resin content of the binder pitch for an aluminum electrode. CB has been shown to enhance the release of volatile compounds and to act as a nucleation point in polymerization [22][23][24]. These properties can be applied to improve binder pitch properties.…”

Section: Introductionmentioning

confidence: 99%

The Control of Volume Expansion and Porosity in Carbon Block by Carbon Black (CB) Addition for Increasing Thermal Conductivity

et al. 2020

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The graphite block as a phase change materials (PCMs) was manufactured by graphitization of a carbon block. Carbon blocks were prepared by filler (cokes or graphite) and binder (pitch). The binder-coated filler was thermally treated for carbonization. The gases generated from the evaporation of low molecular weight components in the binder pitch during the carbonization process were not released to the outside. Consequently, porosity and volume expansion were increased in artificial graphite, and thereby the thermal conductivity decreased. In this study, to prevent the decrease of thermal conductivity in the artificial graphite due to the disadvantages of binder pitch, the carbon block was prepared by the addition of carbon black, which can absorb low molecular weight compounds and release the generated gas. The properties of the prepared carbon blocks were analyzed by SEM, TGA, and thermal conductivity. The addition of carbon black (CB) decreased the porosity and volume expansion of the carbon blocks by 38.3% and 65.9%, respectively, and increased the thermal conductivity by 57.1%. The CB absorbed the low molecular weight compounds of binder pitch and induced the release of generated gases during the carbonization process to decrease porosity, and the thermal conductivity of the carbon block increased.

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Study of Properties of Aluminium Composites Reinforced with Triple Reinforcements

Mathew¹,

Kumar²,

Vijaykumar³

2023

Lecture Notes in Mechanical Engineering

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Effect of carbon black on mechanical properties of Al7075/Al2O3/B4C reinforced aluminum composite

Cited by 5 publications

References 8 publications

Experimental investigation of coconut shell charcoal and boron carbide/zirconium dioxide in aluminium 7075 matrix composites under varying operating conditions: a comparative analysis

Experimental investigation of coconut shell charcoal and boron carbide/zirconium dioxide in aluminium 7075 matrix composites under varying operating conditions: a comparative analysis

The Control of Volume Expansion and Porosity in Carbon Block by Carbon Black (CB) Addition for Increasing Thermal Conductivity

Study of Properties of Aluminium Composites Reinforced with Triple Reinforcements

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