scholarly journals Study of Microstructural and Mechanical Properties of Al/SiC/TiO2 Hybrid Nanocomposites Developed by Microwave Sintering

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1078
Author(s):  
Manohar Reddy Mattli ◽  
Penchal Reddy Matli ◽  
Adnan Khan ◽  
Rokaya Hamdy Abdelatty ◽  
Moinuddin Yusuf ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tio2 Nanoparticles ◽  
Microwave Sintering ◽  
Aluminum Matrix ◽  
Hybrid Nanocomposites ◽  
Shear Mode ◽  
Fixed Amount ◽  
Metal Matrix Nanocomposites ◽  
Hybrid Metal Matrix Nanocomposites ◽  
Al Matrix

Aluminum hybrid metal matrix nanocomposites (Al/SiC/TiO2) were synthesized through a microwave-assisted powder metallurgy process, and their evolved microstructure and mechanical properties were investigated. The Al/SiC/TiO2 hybrid nanocomposites were prepared by reinforcing aluminum (Al) matrix with a fixed amount of silicon carbide (SiC) nanoparticles (5 wt.%) and varying concentrations of titanium dioxide (TiO2) nanoparticles (3, 6, and 9 wt.%). The morphology results revealeda uniform distribution of SiC and TiO2 reinforcements in the aluminum matrix. An increase in the hardness and compressive strength of the Al/SiC/TiO2 hybrid nanocomposites was noticed with the increasein TiO2 nanoparticles. The Al/SiC/TiO2 hybrid nanocomposites that had an optimum amount of TiO2 nanoparticles (9 wt.%) showcased the best mechanical properties, with maximum increments of approximately 124%, 90%, and 23% of microhardness (83 ± 3 HV), respectively, yield strength (139 ± 8 MPa), and ultimate compression strength (375 ± 6 MPa) as compared to that of pure Al matrix. The Al/SiC/TiO2 hybrid nanocomposites exhibited the shear mode of fracture during their deformation process.

scholarly journals Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

Ceramics ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Manohar Mattli ◽  
Penchal Matli ◽  
Abdul Shakoor ◽  
Adel Amer Mohamed
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Yield Strength ◽  
Volume Fraction ◽  
Microwave Sintering ◽  
Aluminum Matrix ◽  
Microstructural Investigation ◽  
Porosity Level ◽  
Amorphous Si3n4 ◽  
Al Matrix

The present study focuses on the synthesis and characterization of amorphous silicon nitride (Si3N4) reinforced aluminum matrix nanocomposites through the microwave sintering process. The effect of Si3N4 (0, 1, 2 and 3 wt.%) nanoparticles addition to the microstructure and mechanical properties of the Al-Si3N4 nanocomposites were investigated. The density of Al-Si3N4 nanocomposites increased with increased Si3N4 content, while porosity decreased. X-ray diffraction (XRD) analysis reveals the presence of Si3N4 nanoparticles in Al matrix. Microstructural investigation of the nanocomposites shows the uniform distribution of Si3N4 nanoparticles in the aluminum matrix. Mechanical properties of the composites were found to increase with an increasing volume fraction of amorphous Si3N4 reinforcement particles. Al-Si3N4 nanocomposites exhibits higher hardness, yield strength and enhanced compressive performance than the pure Al matrix. A maximum increase of approximately 72% and 37% in ultimate compressive strength and 0.2% yield strength are achieved. Among the synthesized nanocomposites, Al-3wt.% Si3N4 nanocomposites displayed the maximum hardness (77 ± 2 Hv) and compressive strength (364 ± 2 MPa) with minimum porosity level of 1.1%.

scholarly journals Structural and Mechanical Properties of Al-SiC-ZrO2 Nanocomposites Fabricated by Microwave Sintering Technique

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 904
Author(s):  
Adnan Khan ◽  
Motasem W. Abdelrazeq ◽  
Manohar Reddy Mattli ◽  
Moinuddin M. Yusuf ◽  
Abdullah Alashraf ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Microwave Sintering ◽  
Microstructural Analysis ◽  
Industrial Applications ◽  
Zro2 Nanoparticles ◽  
Shear Mode ◽  
The Matrix ◽  
Ball Milling Technique ◽  
Al Matrix

In the present study, Al-SiC-ZrO2 nanocomposites were developed and characterized. Towards this direction, the aluminum (Al) matrix was reinforced with nano-sized silicon carbide (SiC) and zirconium dioxide (ZrO2), and the mixture was blended using ball milling technique. The blended powder was compacted and sintered in a microwave sintering furnace at 550 °C with a heating rate of 10 °C/min and a dwell time of 30 min. The amount of SiC reinforcement was fixed to 5 wt.%, while the concentration of ZrO2 was varied from 3 to 9 wt.% to elucidate its effect on the microstructural and mechanical properties of the developed nanocomposites. Microstructural analysis revealed the presence and uniform distribution of reinforcements into the Al matrix without any significant agglomeration. The mechanical properties of Al-SiC-ZrO2 nanocomposites (microhardness and compressive strength) were observed to increase with the increase in the concentration of ZrO2 nanoparticles into the matrix. Al-SiC-ZrO2 nanocomposites containing 9 wt.% of ZrO2 nanoparticles demonstrated superior hardness (67 ± 4 Hv), yield strength (103 ± 5 MPa), and compressive strength (355 ± 5 MPa) when compared to pure Al and other compositions of the synthesized composites. Al-SiC-ZrO2 nanocomposites exhibited the shear mode of fracture under compression loadings, and the degree of deformation was restricted due to the work hardening effect. The appealing properties of Al-SiC-ZrO2 nanocomposites make them attractive for industrial applications.

Orientation Studies of α-Al(Fe,Mn)Si Dispersoids in 3xxx Al Alloys

2014 ◽  
Vol 794-796 ◽  
pp. 39-44 ◽  
Author(s):  
Astrid Marie Flattum Muggerud ◽  
Yan Jun Li ◽  
Randi Holmestad
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Orientation Relationship ◽  
Aluminum Matrix ◽  
Al Alloys ◽  
Orientation Relationships ◽  
The Matrix ◽  
The Common ◽  
Habit Planes ◽  
Al Matrix

Dispersoids are important in 3xxx Al alloys, influencing mechanical properties, texture and recrystallization. In this work α-Al (Fe,Mn)Si dispersoids have been studied after low temperature homogenisation. The common orientation relationship between dispersoids and Al matrix has been reported in earlier studies. Here a systematic study on the orientation relationship and its exceptions is presented. It is found that most of the dispersoids follow the common orientation relationship, [1-1 1] α //[1-1 1]Al , (5-2 -7 ) α //(0 1 1)Al . Here the dispersoids are semi coherent with the Aluminum matrix. Different morphologies and habit planes are possible. Deviations from the most commonly observed orientation relationships are presented and discussed, to underline the complexity of the phase and its relation to the matrix.

MOLECULAR DYNAMICS STUDIES ON THE STRENGTH PREDICTION OF INTERFACE BETWEEN AL-AL4C3 IN METAL MATRIX NANOCOMPOSITES

2020 ◽  
Vol 25 (1) ◽  
pp. 67-75
Author(s):  
Deni Haryadi ◽  
Haris Rudianto ◽  
Mohamad Yamin
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Aluminum Matrix ◽  
Intermolecular Potential ◽  
Metal Matrix Nanocomposites ◽  
Carbon Particles ◽  
Interface Orientation ◽  
Dynamics Simulations ◽  
Matrix Nanocomposites ◽  
Al Matrix

In this study, molecular dynamics simulations (MD) will be applied to modelling the Al4C3-aluminum interface in aluminum nanocomposite, Al4C3 is an interface that results from the shaker mill process which becomes a bridge that plays an important role in Carbon particles with Aluminium Matrix and Based on observations from the TEM characterization, it is found that the relationship between Al orientation to Al4C3 is (111) (002) (220). The characteristics of the interface between Aluminum matrix and Al4C3 will be analyzed using uniaxial tension and shear test simulation. The atomic potential used in this simulation is the embedded atomic method (EAM) for Al, empirical-order intermolecular potential (AIREBO) for C and lennard jones for the reaction of Al-C atom. The result shows that, the interface orientation is Al matrix (002) || Al4C3 (003) has the highest interface strength compared to Al matrix (111) || Al4C3 (003) and Al matrix (200) Interface orientation || Al4C3 (003). Results from the molecular dynamics simulations are also discussed with analytical results obtained experimental

scholarly journals Mechanical Characterization of Nanomaterial Reinforced Aluminum-based Hybrid Nanocomposites

2019 ◽  
Vol 2 (1) ◽  
pp. 32-41
Author(s):  
Girisha L ◽  
Malteshkumar Deshpande ◽  
Gururaja Lakshman Naik ◽  
Mahanthesh M R
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Mechanical Characterization ◽  
Hybrid Nanocomposites ◽  
Percentage Elongation ◽  
Multiwalled Carbon ◽  
Fiber Materials ◽  
Composite Samples ◽  
Al Matrix

Nanostructures are viewed as definitive fiber materials as a reinforcement for matrices because of their impressive properties. Because of their phenomenal mechanical properties Carbon nanotubes (CNTs), graphene (GR), and nanodiamond (ND) have made an enormous proportion of intensity in research over the world. Multiwalled carbon nanotubes (MWCNTs), Graphene, and Nano Diamond were utilized as reinforcements for the current work. Nanostructures with their extraordinary strength, minute size, and high aspect ratio were used as reinforcements in commercial-purity Al matrix. These nanocomposites were manufactured by various different routes such as casting and powder metallurgy techniques. Both of these methods are helpful for the preparation of MWCNTs/Al nanocomposites. These nanocomposites were manufactured with various weight fractions of reinforcements and characterized for their mechanical properties and indicated improved properties in contrast with the base Al matrix. Al/MWCNT nanocomposites, Al/MWCNT/GR hybrid nanocomposites and Al/MWCNT/GR/ND hybrid nanocomposites samples were tested for their mechanical properties such as Young’s modulus, percentage elongation yield strength, and ultimate Strength. Mechanical characterization of these prepared composite samples demonstrated improved strength when compared with the casted samples.

MOLECULAR DYNAMICS STUDIES ON THE STRENGTH PREDICTION OF INTERFACE BETWEEN AL-AL4C3 IN METAL MATRIX NANOCOMPOSITES

2020 ◽  
Vol 25 (1) ◽  
pp. 67-75
Author(s):  
Deni Haryadi ◽  
Haris Rudianto ◽  
Mohamad Yamin
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Aluminum Matrix ◽  
Intermolecular Potential ◽  
Metal Matrix Nanocomposites ◽  
Carbon Particles ◽  
Interface Orientation ◽  
Dynamics Simulations ◽  
Matrix Nanocomposites ◽  
Al Matrix

In this study, molecular dynamics simulations (MD) will be applied to modelling the Al4C3-aluminum interface in aluminum nanocomposite, Al4C3 is an interface that results from the shaker mill process which becomes a bridge that plays an important role in Carbon particles with Aluminium Matrix and Based on observations from the TEM characterization, it is found that the relationship between Al orientation to Al4C3 is (111) (002) (220). The characteristics of the interface between Aluminum matrix and Al4C3 will be analyzed using uniaxial tension and shear test simulation. The atomic potential used in this simulation is the embedded atomic method (EAM) for Al, empirical-order intermolecular potential (AIREBO) for C and lennard jones for the reaction of Al-C atom. The result shows that, the interface orientation is Al matrix (002) || Al4C3 (003) has the highest interface strength compared to Al matrix (111) || Al4C3 (003) and Al matrix (200) Interface orientation || Al4C3 (003). Results from the molecular dynamics simulations are also discussed with analytical results obtained experimental

scholarly journals Development and Performance analysis of Novel Cast AA7076-Graphene Amine-Carbon Fiber Hybrid Nanocomposites for Structural Applications

2021 ◽  
Vol 12 (2) ◽  
pp. 1480-1489
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Matrix Material ◽  
Hybrid Nanocomposites ◽  
Homogeneous Distribution ◽  
Metal Matrix Nanocomposites ◽  
Structural Applications ◽  
Percent Increase

Lightweight aluminum metal matrix nanocomposites play an important role in aerospace, military, automotive, electricity, and structural applications due to their improved mechanical, physical, and tribological properties. The hybrid nanocomposites were made using a motorized stir casting technique to achieve the desired mechanical properties. The composites were made using a mixture of graphene amine and carbon fibers in various weight proportions. The hybrid nanocomposites were created by varying the weight percentage (wt.%) of reinforcements in the AA7076 base matrix, such as 0.5wt % carbon fiber (micro filler) and 0.5wt % graphene (nanofiller). X-Ray Diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the homogeneous distribution of the fabricated hybrid composite. The mechanical properties of the hybrid composites were assessed using hardness and tensile measures. The composite with 1wt. percent reinforcements had a 50 percent increase in hardness and a 42 percent increase in tensile strength as compared to the base AA7076 matrix content. The wear tests were conducted using a pin-on-disc tribo tester, and the results showed that the hybrid composite (1wt.%) outperformed the AA7076 matrix material in terms of wear resistance.

scholarly journals Effect of the Hot Deformation Conditions on Structure and Mechanical Properties of AlCr/AlCrSi Powder Composites

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1853
Author(s):  
Elena N. Korosteleva ◽  
Gennady A. Pribytkov ◽  
Victoria V. Korzhova
Keyword(s):  
Mechanical Properties ◽  
Hot Deformation ◽  
Volume Growth ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
High Porosity ◽  
Matrix Composites ◽  
Powder Mixtures ◽  
Study Results ◽  
Al Matrix

Aluminum matrix composites usually contain strengthening particles of refractory compounds (SiC, Al2O3) that do not react with the Al matrix. There is a problem in producing the Al matrix composite with inclusion of metals that can generate intermetallic compounds with aluminum. In this case, a conventional sintering of powder mixtures results in high porosity due to volume growth. That is why some new methods of producing dense Al matrix composites are required. A possibility to create a dense powder Al-based composite containing hard components, such as chromium and silicon, without using the sintering process, is considered. This paper presents study results of structural and mechanical properties of Al-Cr and Al-Cr-Si composites produced by hot compaction of powder mixtures. An analysis of the relationship between mechanical properties and structures of Al-Cr and Al-Cr-Si composites is carried out. Optimal values for thermomechanical processing modes that ensure sufficient strength and plasticity are determined. It is shown that strong bonding of the aluminum particles occurs under hot deformation, and an aluminum matrix is formed that provides acceptable composite bending strength as a result. The presence of chromium and silicon hard inclusions is not a significant obstacle for aluminum plastic flow. Al-Cr and Al-Cr-Si composites produced by hot deformation of the powder mixtures can be used as cathode material for the deposition of wear-resistant nitride coatings on metalworking tools.

Preparation of SiCp/Al Functionally Gradient Composites

2014 ◽  
Vol 602-603 ◽  
pp. 582-585
Author(s):  
Jian Jun Ma ◽  
Yu Hong Chen ◽  
Li Hui Wang ◽  
Liang Jiang
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Microwave Sintering ◽  
Aluminum Matrix ◽  
Sintered Sample ◽  
Optical Microscope ◽  
Functionally Gradient ◽  
Silicon Carbide Particles ◽  
Carbide Particles ◽  
Better Than

In this study, functionally gradient aluminum reinforced by Silicon carbide particles (FGMSiCp/Al) composites are prepared by microwave sintering and pressureless sintering processing. The sintering behaviors, mechanical properties of composites were measured, and microstructure was observed by optical microscope and SEM. The results showed that the density of sintered samples which prepared by microwave sintering were better than that presureless sintering one. The highest density of sintered sample by microwave sintering reached 2.64 g/cm3, the relative density was 95.65%. Whatever preparing process, the mechanical properties of sintered samples were related to the temperature. The distribution of silicon carbide particles is uniform in the aluminum matrix, however, slight agglomeration can be observed. The interface between other layers is not obvious except interface between Al and 5% SiC/Al layer.

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