Mechanical Behavior and Metallographic Characterization of Microwave Sintered Al/SiC Composite Materials – an Experimental Approach

Shoba, Chintada; Dora, Siva Prasad; Kare, Dorathi

doi:10.1007/s12633-021-01409-5

Cited by 11 publications

(2 citation statements)

References 41 publications

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“…Metal matrix composite materials (MMC) are made by combining a distinguished element or metal with another organic or ceramic material to achieve improved mechanical properties over conventional materials [1]. Metal matrix composites (MMCs) have properties due to their combination of two or more materials [2]. In today's engineering world, aluminum metal matrix composites are used in applications such as aircraft, automotive, and aerospace components.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Electronic Properties of Al(111)/6H-SiC Interfaces: A DFT Study

2023

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A density functional theory (DFT) calculation is carried out in this work to investigate the effect of vacancies on the behavior of Al(111)/6H SiC composites. Generally, DFT simulations with appropriate interface models can be an acceptable alternative to experimental methods. We developed two modes for Al/SiC superlattices: C-terminated and Si-terminated interface configurations. C and Si vacancies reduce interfacial adhesion near the interface, while Al vacancies have little effect. Supercells are stretched vertically along the z-direction to obtain tensile strength. Stress–strain diagrams illustrate that the tensile properties of the composite can be improved by the presence of a vacancy, particularly on the SiC side, compared to a composite without a vacancy. Determining the interfacial fracture toughness plays a pivotal role in evaluating the resistance of materials to failure. The fracture toughness of Al/SiC is calculated using the first principal calculations in this paper. Young’s modulus (E) and surface energy (Ɣ) is calculated to obtain the fracture toughness (KIC). Young’s modulus is higher for C-terminated configurations than for Si-terminated configurations. Surface energy plays a dominant role in determining the fracture toughness process. Finally, to better understand the electronic properties of this system, the density of states (DOS) is calculated.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Electronic Properties of Al(111)/6H-SiC Interfaces: A DFT Study

2023

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“…The addition of silicon carbide and titanium diboride reinforcements to the Al 6061 matrix using the stir casting method increases the hardness value, while the wear resistance increases up to a certain point and then drops sharply (Mahajan et al , 2015). The properties such as hardness, ultimate tensile strength, yield strength were significantly improved with the addition of SiC reinforcement as 5%, 10% and 15%, on Al, when fabricated using P/M technique; the influence of particle size on the properties was also studied, which increases as particle sizes decreases (Chintada et al , 2021). The presence of SiC particles in composites up to a certain percentage improved their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and microstructural characterization of Al-SiC based functionally graded disk

Madan

Bhowmick

2022

AEAT

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Purpose The purpose of this study is to investigate the performance of disks that can be increased by functionally grading the disk in the radial direction; there are several but distinct categories of literature that pertain to the fabrication of disk in the thickness direction, but to the best of the authors’ knowledge, no study has been conducted yet, in which gradient composition changes radially. Design/methodology/approach A powder metallurgy technique was used for the fabrication of Al-SiC-based, three-and five-layered functionally graded (FG) disk. The variation of volume fraction of reinforcement particles (SiC) in a disk changes radially. Finite element analysis has been performed to investigate stress distribution in a layered disk. Findings The microstructural investigation was carried out under an optical microscope and scanning electron microscopy integrated with EDS, confirming a uniform distribution of SiC in the matrix (Al). Interface microstructure indicates a successful fabrication of FG material because the transition is uniform in the graded layer without any development of crack or void at the interface. The grain size in the layers decreases with the addition of SiC particles. Additionally, the disk hardness increases as the SiC composition in the layer increases. Practical implications An FG disk can be used in a wide range of machinery, from power transmission assemblies to energy storage devices (e.g. flywheel, gears, rotors and disk brake). Originality/value The proposed powder metallurgy technique could be used in industries for the fabrication of simple to complicated geometries with FG properties.

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