Gas-Liquid In Situ Production of Ceramic Reinforced Aluminum Matrix Nanocomposites

2014 ◽  
Vol 783-786 ◽  
pp. 2011-2015 ◽  
Author(s):  
L. Ceschini ◽  
Alessandro Morri ◽  
F. Rotundo ◽  
S. Toschi
Keyword(s):  
Aluminum Matrix ◽  
Strengthening Effect ◽  
Metal Matrix Nanocomposites ◽  
Dry Air ◽  
Liquid Reaction ◽  
Alumina Particles ◽  
Hardness Increase ◽  
Gas Bubbling ◽  
Matrix Nanocomposites

The present study aims at evaluating the gas bubbling method, based on the use of dry air as a gaseous phase, for the production of Al based metal matrix nanocomposites through a proper gas-liquid reaction. In particular, Al2O3 reinforcement particles were in-situ synthesized in molten commercially pure Al through a gas bubbling oxidation technique. Dry air was injected in the melt in order to induce a controlled oxidation of the molten matrix. SEM-EDS analysis on the produced samples revealed the presence of alumina particles, ranging from the nanoto the micrometric size, demonstrating the feasibility of the process. A hardness increase on the produced samples confirmed the strengthening effect of the in-situ produced ceramic particles.

scholarly journals Wettability in Metal Matrix Composites

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1034
Author(s):  
Massoud Malaki ◽  
Alireza Fadaei Tehrani ◽  
Behzad Niroumand ◽  
Manoj Gupta
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Interfacial Strength ◽  
High Strength ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Metal Matrix Nanocomposites ◽  
Aerospace Applications ◽  
Matrix Nanocomposites

Metal matrix composites (MMCs) have been developed in response to the enormous demand for special industrial materials and structures for automotive and aerospace applications, wherein both high-strength and light weight are simultaneously required. The most common, inexpensive route to fabricate MMCs or metal matrix nanocomposites (MMNCs) is based on casting, wherein reinforcements like nanoceramics, -carbides, -nitrides, elements or carbon allotropes are added to molten metal matrices; however, most of the mentioned reinforcements, especially those with nanosized reinforcing particles, have usually poor wettability with serious drawbacks like particle agglomerations and therefore diminished mechanical strength is almost always expected. Many research efforts have been made to enhance the affinity between the mating surfaces. The aim in this paper is to critically review and comprehensively discuss those approaches/routes commonly employed to boost wetting conditions at reinforcement-matrix interfaces. Particular attention is paid to aluminum matrix composites owing to the interest in lightweight materials and the need to enhance the mechanical properties like strength, wear, or creep resistance. It is believed that effective treatment(s) may enormously affect the wetting and interfacial strength.

scholarly journals A Novel Route for Development of Bulk Al/SiC Metal Matrix Nanocomposites

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Payodhar Padhi ◽  
Sachikanta Kar
Keyword(s):  
Metal Matrix ◽  
Spray Deposition ◽  
Aluminum Matrix ◽  
Weight Percent ◽  
Nano Particles ◽  
Solidification Processing ◽  
Ultrasonic Probe ◽  
Metal Matrix Nanocomposites ◽  
Sic Particulates ◽  
Matrix Nanocomposites

Addition of nano particles, even in quantities as small as 2 weight percent can enhance the hardness or yield strength by a factor as high as 2. There are several methods for the production of metal matrix nanocomposites including mechanical alloying, vertex process, and spray deposition and so forth. However, the above processes are expensive. Solidification processing is a relatively cheaper route. During solidification processing, nano particulates tend to agglomerate as a result of van der Waals forces and thus proper dispersion of the nano particulate in metal matrix is a challenge. In the present study a noncontact method, where the ultrasonic probe is not in direct contact with the liquid metal, was attempted to disperse nanosized SiC particulates in aluminum matrix. In this method, the mold was subjected to ultrasonic vibration. Hardness measurements and microstructural studies using HRTEM were carried out on samples taken from different locations of the nanocomposite ingot cast by this method.

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

Preparation and Microstructure of Nano ZrB2 Reinforced Aluminum Matrix Composites

2013 ◽  
Vol 575-576 ◽  
pp. 179-182
Author(s):  
Hong Ming Wang ◽  
Guirong Li ◽  
Yun Cai ◽  
Yu Tao Zhao
Keyword(s):  
Molten Aluminum ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Direct Reaction ◽  
Matrix Composites ◽  
Liquid Reaction ◽  
Particulate Reinforced ◽  
Electronic Microscope ◽  
Observation Results

The ZrB2 particulate reinforced aluminum matrix composites were fabricated via melt direct reaction method using Al-K2ZrF6-KBF4 components. 850°C and 30 min were the optimized synthesizing temperature and reaction time separately. The metallurgical thermodynamic and kinetic processes were then analyzed in detail. It reveals that the interphases include Al3Zr, AlB2, [Z and [ atoms. The ZrB2 particulates can be acquired through the molecular combination between Al3Zr and AlB2 or atomic combination between Zr and B atomics. The in situ reaction between reactive salts and molten aluminum takes place spontaneously, which exhibits the character of liquid-liquid reaction. Scanning electronic microscope observation results demonstrate that the sizes of ZrB2 particulates are almost 100-200 nm. The intervals between particles are almost 200-400 nm, demonstrating a unirom status of distribution.

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

Regulation of interface between carbon nanotubes-aluminum and its strengthening effect in CNTs reinforced aluminum matrix nanocomposites

Carbon ◽  
2019 ◽  
Vol 155 ◽  
pp. 686-696 ◽  
Author(s):  
Xin Zhang ◽  
Shufeng Li ◽  
Bo Pan ◽  
Deng Pan ◽  
Lei Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aluminum Matrix ◽  
Strengthening Effect ◽  
Matrix Nanocomposites
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