Structural, elemental and thermal conductivity analysis of AA 2024 hybrid metal matrix composites reinforced with slag, CaCO3 and solid lubricants

2021 ◽  
Author(s):  
N. Iyandurai ◽  
P. Duraisamy ◽  
M. Muniyappan ◽  
M. Mahendraboopathi
Keyword(s):  
Thermal Conductivity ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Solid Lubricants ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites ◽  
Aa 2024

scholarly journals A Review on Mechanical and Tribological Properties of Graphite Reinforced Self Lubricating Hybrid Metal Matrix Composites

2018 ◽  
Vol 56 (1) ◽  
pp. 1-20 ◽  
Author(s):  
S. K. Khatkar ◽  
N. M. Suri ◽  
S. Kant ◽  
Pankaj
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Secondary Reinforcement ◽  
Solid Lubricants ◽  
Matrix Composites ◽  
Mechanical And Tribological Properties ◽  
Energy Applications ◽  
Environmental Friendly ◽  
Hybrid Metal Matrix Composites

Abstract Hybrid metal matrix composites (HMMC’s) are next generation metal matrix composite materials that have the potential of gratifying recent demands of advanced energy applications in the field of aerospace, automobile and biomedical. The MMC’s have to work at elevated temperature or vacuum environment where lubrication using liquid lubricants is ineffective or difficult to achieve; moreover, liquid lubricants are not environmental friendly, since they releases pollutants into environment. Solid lubricants such as graphite, CNT’s, MoS2and graphene have been widely used as secondary reinforcements to meet such operational needs by fabricating green or environmental friendly self lubricating HMMC’s. This article outlines recent advances in the area of self lubricating HMMC’s reinforced with graphite as secondary reinforcement. The focus of the study was on mechanical and tribological behavior of Aluminum and magnesium based self lubricating HMMC’s. The effect of graphite, different hybrid reinforcements and their strengthening mechanisms are also discussed in detail.

scholarly journals Effect of Gr Contents on Wear Properties of Al2024/MgO/Al2O3/Gr Hybrid Composites

2018 ◽  
Vol 167 ◽  
pp. 02010 ◽  
Author(s):  
İsmail Ovalı ◽  
Cemal Esen ◽  
Sevda Albayrak ◽  
Halil Karakoç
Keyword(s):  
Wear Resistance ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Three Dimensional ◽  
Matrix Composites ◽  
Wear Properties ◽  
Wear Process ◽  
Hybrid Metal Matrix Composites ◽  
Aa 2024

In the present study, hybrid metal matrix composites, Al2024/10Al2O3, Al2024/10Al2O3/3MgO, Al2024/10Al2O3/6MgO, Al2024/10Al2O3/3MgO/1.5 Gr, Al2024/10Al2O3/3MgO/3Gr, and reinforcement samples (AA 2024) produced with powder metallurgy process. AA 2024 and reinforcement powders were determined mixture rations and separately mixed during 30 minutes in a three-dimensional Turbula mixer. The mixed compositions were pressed at 300 MPa and sintered at 550°C during 1 h. After that, three materials were extruded at the same temperature. Experimental results show that hybrid metal matrix composites (HMMCs) a better wear resistance than the reinforcement samples because of higher hardness. Gr behave as a lubricant during wear process. The wear resistance of HMMCs can be optimized with controlling of the reinforcement content and type.

scholarly journals structural characterization and dielectric properties of the effect of carbon nanotubes and silicon on AA2024 Metal Matrix Composites

2021 ◽  
Author(s):  
Muniyappan Mani ◽  
Iyandurai Natesan
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Properties ◽  
Metal Matrix Composites ◽  
Structural Characterization ◽  
Metal Matrix ◽  
Research Work ◽  
Dissipation Factor ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites ◽  
Aa 2024

Abstract This research work focuses on the formation of AA2024-carbon nanotubes-silicon hybrid metal matrix composites. Structure morphology, structural characterization, elemental identification and dielectric properties of AA 2024 in the presence of carbon nanotubes, silicon and its combinations at various proportions were evaluated using SEM, XRD, EDX and Hioki 3532-50 LCR Hi-Tester. A two-stage stir casting method was used for the fabrication of AA2024 hybrid metal matrix composites. It was observed that the size of the AA 2024 + 4% CNT + 2% Si composite was found to be 23.6 nm, this shows enhanced results than other composites prepared. Dielectric properties of composites were characterized as a function of composition and frequency. It was found that the dielectric constant, dielectric loss and dissipation factor decreases smoothly with an increase of reinforcements and also frequency.

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