Preparation of Metal Matrix Aluminum Alloys Composites Reinforced by Silicon Nitride and Aluminum Nitride through Powder Metallurgy Techniques

2012 ◽  
Vol 727-728 ◽  
pp. 259-262 ◽  
Author(s):  
Everthon Rodrigues de Araujo ◽  
Marcio Marcelo Sampaio de Souza ◽  
Francisco Ambrozio Filho ◽  
Cezar Henrique Gonzalez ◽  
Oscar Olimpio de Araújo Filho
Keyword(s):  
Silicon Nitride ◽  
Metal Matrix ◽  
Low Cost ◽  
Matrix Material ◽  
Hardness Test ◽  
Matrix Composites ◽  
Mechanical And Physical Properties ◽  
Uniaxial Compaction ◽  
Matrix Aluminum Alloys ◽  
Sintered Materials

The aliminium alloys are of particular interest to both the aerospace industry and automotive industry because of their attractive combinations of properties such as medium strength, formability, weldability, corrosion resistance and low cost. Compared with a metal matrix material, significant improvements in the mechanical and physical properties such as strength, toughness, and thermal conductivity can be achievied in metal matrix composites (MMCs). In this work of investigation aluminium alloy AA6061 was reinforced by 5, 10 and 15% (in mass %) of Si3N4 (silicon nitride) and AlN (aluminium nitride) by mechanical alloying in a vibratory type SPEX mill, cold uniaxial compaction and vacuum sitering in order to investigate the influence of the particulate phase in the microstructure and mechanical properties of the composites obtained. The microstructure of the powders and the sintered materials were evaluated by means of SEM and the hardness and were evaluated by hardness test.

scholarly journals Thermal Investigation of Aluminium – 11.8% Silicon (LM6) Reinforced SiO2-Particles

2011 ◽  
Vol 264-265 ◽  
pp. 620-625 ◽  
Author(s):  
Mohd Sayuti ◽  
S. Suraya ◽  
Shamsuddin Sulaiman ◽  
T.R. Vijayaram ◽  
Mohd Khairol A. Arifin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
High Performance ◽  
Low Cost ◽  
Hardness Test ◽  
Weight Fraction ◽  
Matrix Composites ◽  
Casting Technique ◽  
And Performance ◽  
Commercial Applications

High performance automotive, aerospace, electronics and other industrial and commercial applications are finding tremendous advantages in using metal matrix composites. The reinforcement is very important because it determines the mechanical properties, cost and performance of a given composite. An excellent in mechanical properties, combined with the ease of formability and low cost makes the application of metal matrix composite of aluminium-11.8% silicon reinforced SiO2 to increase steadily. This paper investigates the interrelationships between thermal properties and reinforcement content, microstructure and hardness of LM6 reinforced SiO2 composites. Specimens were fabricated by casting technique for 5, 10, 15 and 20% weight fractions of SiO2 particulate and mesh of: 65 micron. The experimental results show that the thermal diffusivity and thermal conductivity decreases as SiO2 wt.% of the composite increases and under hardness test, it was found that the hardness value had increased gradually with the increased addition of quartz particulate by weight fraction percentage.

Processing and Manufacturing of Metal Matrix Aluminum Alloys Composites Reinforced by Silicon Carbide and Alumina through Powder Metallurgy Techniques

2012 ◽  
Vol 727-728 ◽  
pp. 254-258
Author(s):  
Everthon Rodrigues de Araujo ◽  
Sérvulo José Ferreira Alves ◽  
Francisco Ambrozio Filho ◽  
Severino Leopoldino Urtiga Filho ◽  
Oscar Olimpio de Araújo Filho
Keyword(s):  
Metal Matrix ◽  
The Other ◽  
Particulate Phase ◽  
Vacuum Sintering ◽  
Hardness Tests ◽  
The Matrix ◽  
Conventional Material ◽  
Uniaxial Compaction ◽  
Matrix Aluminum Alloys ◽  
Sintered Materials

Composites are combinations of two materials in which one of the materials, called the reinforcing phase, is in the form of fibers, sheets, or particles and is embedded in the other materials called the matrix phase. If the composite is designed and fabricated correctly, it combines the strength of the reinforcement with the toughness of the matrix to achieve a combination of desirable properties not available in any single conventional material. In this work of research aluminium alloy AA6061 was reinforced by 5, 10 and 15% (in mass %) of SiC and Al2O3 by mechanical alloying in a vibratory type SPEX mill, cold uniaxial compaction and vacuum sintering in order to investigate the influence of the particulate phase in the microstructure and mechanical properties of the composites obtained. The microstructure of the powders and the sintered materials were evaluated by SEM and the hardness was evaluated by hardness tests.

Fabrication and characterization of SiC-reinforced Al-4032 metal matrix composites

2022 ◽  
Author(s):  
Pardeep Saini ◽  
Pradeep K. Singh
Keyword(s):  
Impact Toughness ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Low Cost ◽  
Matrix Material ◽  
Stir Casting ◽  
Optical Microscope ◽  
Matrix Composites ◽  
Sic Composites ◽  
The Impact

Abstract Aluminium metal matrix composites (AMCs) have become quite popular for light weight, low cost, and good workability. The present work reports the impact of silicon carbide (SiC) reinforcement on the physical, microstructural, and mechanical characteristics of Al-4032/SiC composites with 4, 6, 8% of SiC (particle size 54μm) fabricated through bottom pouring stir casting. Density and porosity measurements of all three AMCs have been performed using the rule of mixture. The microstructure of the AMC samples has been analyzed using an optical microscope (OM), x-ray diffraction analysis (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The mechanical properties, in terms of the ultimate tensile strength (UTS), elongation, micro-hardness, and impact toughness of the AMCs have also been obtained according to American society for testing and materials (ASTM) standards. A maximum 1.52% increase in theoretical density, while a maximum 2.92% decrease in experimental density has been recorded for 8% reinforcement. The UTS, microhardness, and impact toughness of the AMC have been found to improve significantly owing to the addition of ceramic particles. The uniform distribution of SiC particles all over base Al-4032 matrix material has been noticed by SEM and OM for AMCs up to 6% reinforcement.

scholarly journals Interfacial Aspects of Metal Matrix Composites Prepared from Liquid Metals and Aqueous Solutions: A Review

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1400
Author(s):  
Peter Baumli
Keyword(s):  
Aqueous Solutions ◽  
Physical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Liquid Metals ◽  
Interfacial Phenomena ◽  
Matrix Composites ◽  
Good Adhesion ◽  
Mechanical And Physical Properties ◽  
The Matrix

The paper reviews the preparation of the different metallic nanocomposites. In the preparation of composites, especially in the case of nanocomposites, interfacial phenomena play an important role. This review summarizes the literature on various interfacial phenomena, such as wettability and reactivity in the case of casting techniques and colloidal behavior in the case of electrochemical and electroless methods. The main contribution of this work lies in the evaluation of collected interfacial phenomena and difficulties in the production of metal matrix composites, for both nano-sized and micro-sized reinforcements. This study can guide the composite maker in choosing the best criteria for producing metal matrix composites, which means a real interface with good adhesion between the matrix and the reinforcement. This criterion results in desirable mechanical and physical properties and homogenous dispersion of the reinforcement in the matrix.

Finite Element Modeling for Prediction of Residual Stresses in Fiber Reinforced Metal Matrix Composites

1993 ◽  
Author(s):  
Partha Rangaswamy ◽  
N. Jayaraman
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Material ◽  
Unit Cell ◽  
Experimental Results ◽  
Matrix Composites ◽  
Layer Removal

Abstract In metal matrix composites residual stresses developing during the cool-down process after consolidation due to mismatch in thermal expansion coefficients between the ceramic fibers and metal matrix have been predicted using finite element analysis. Conventionally, unit cell models consisting of a quarter fiber surrounded by the matrix material have been developed for analyzing this problem. Such models have successfully predicted the stresses at the fiber-matrix interface. However, experimental work to measure residual stresses have always been on surfaces far away from the interface region. In this paper, models based on the conventional unit cell (one quarter fiber), one fiber, two fibers have been analyzed. In addition, using the element birth/death options available in the FEM code, the surface layer removal process that is conventionally used in the residual stress measuring technique has been simulated in the model. Such layer removal technique allows us to determine the average surface residual stress after each layer is removed and a direct comparison with experimental results are therefore possible. The predictions are compared with experimental results of an eight-ply unidirectional composite with Ti-24Al-11 Nb as matrix material reinforced with SCS-6 fibers.

Production of Metal Matrix Composite Using a Bottom Tapping Stir Casting Furnace

2015 ◽  
Vol 772 ◽  
pp. 263-267 ◽  
Author(s):  
Ramanathan Arunachalam ◽  
Majid Al-Maharbi ◽  
Yahya Al Kiyumi ◽  
Elyas Aal-Thani ◽  
Mohammed Al Mafraji
Keyword(s):  
Continuous Improvement ◽  
Manufacturing Process ◽  
Metal Matrix ◽  
Low Cost ◽  
Casting Process ◽  
Stir Casting ◽  
Matrix Composites ◽  
High Quality ◽  
Reinforcement Material ◽  
Low Cost Manufacturing

Metal matrix composites (MMC's) have attracted the attention of researchers for quite some time. In the last 15 years, many studies have been reported in this field of MMC production through various routes. The most commonly used process for producing MMC is stir casting process whereby the reinforcement material is incorporated into the molten metal by stirring. It is a relatively low cost manufacturing process that is capable of producing high quality MMC. However, the process is associated with issues such as attaining uniform distribution of particles, wettability between particles and porosity in the MMCs. Because of these challenges, there has been continuous improvement in the process as well as the design of the furnace. In this research, an innovatively designed bottom tapping furnace has been used to produce the MMCs and the produced sample is characterized.

scholarly journals Processing and Characterization of Aluminum Metal Matrix Composites: An Overview

2018 ◽  
Vol 56 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Mudasar B. A. Pasha ◽  
Mohammed Kaleemulla
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Low Cost ◽  
Review Article ◽  
Homogeneous Distribution ◽  
Thermal Coefficient ◽  
Matrix Composites ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composites

Abstract An increased interest is observed in recent years in the processing of aluminum metal matrix composites (AMMCs) due to their remarkable properties such as light in weight, very high strength, environmental resistance, corrosion resistance, and low thermal coefficient of expansion compared to conventional metal and alloys. This leads to superior compressive strength, for fuel cell applications, low density and low cost for automotive and small engine applications. Homogeneous distribution of the reinforcement phase in turns improves hardness and ultimate tensile strength for lightweight applications, especially aeronautical and high-speed train industries. Uniform distribution of reinforcement directly influences properties and quality of the composite material. And develop a conventional low-cost method of producing metal matrix composites to obtain a homogenous dispersion of reinforcing materials. In this review article, processing and characterization of aluminum metal matrix composites have been reviewed. The Point of convergence is given to the new fabrication techniques, their physical and mechanical characterization. Substantially this review article censoriously reviews the present and past state of understanding of the processing of aluminum metal matrix composites with different reinforcement. The resulting failure mechanisms are discussed. Instructions are given to clarify open questions related to the fabrications of aluminum metal matrix composites.

Sign in / Sign up

Export Citation Format

Share Document