Effects of Surface Modification of SiC Nanoparticles and Preparation Process on Microstructures of SiCp/A6061 Alloy Matrix Composites

2010 ◽  
Vol 97-101 ◽  
pp. 1685-1688 ◽  
Author(s):  
Xiao Dan Li ◽  
Yu Chun Zhai ◽  
Jian Zhong Li ◽  
Feng Qiu
Keyword(s):  
Ceramic Powder ◽  
Stir Casting ◽  
High Energy ◽  
Matrix Composites ◽  
Vacuum Melting ◽  
Alloy Matrix ◽  
Sic Nanoparticles ◽  
Casting Technique ◽  
Energy Ball ◽  
A6061 Alloy

SiC nanoparticles (40nm) reinforced metal matrix composites (MMCs) were made by a common stir casting technique in two different preparation processing routes. In the first route, the coated ceramic powder was prepared using electroless plating to coat SiC nanoparticles by Cu. In the second route, Cu and SiC nanoparticles were fully mixed by high energy ball milling, and then SiC nanoparticles were embedded in Cu to form a “jujube-cake” structure. In both cases the average particles size were 0.2μm. The SiC nanoparticles enhanced A6061 alloy matrix composites were made by stir casting, and as-cast microstructures were studied by means of optical microscopy (OM) and scanning electron microscopy (SEM). The results show that in the first route, the Cu off and the slagging reaction occurs to form a mixture at the upper part of the ingot by a vacuum melting and the ingot central also has a large number of pores, only the lower part of the ingot organization is uniform. The second route can make better uniform composites.

Wear Properties of Cast Aluminium Alloy 6061 Reinforced with Nanosilicon Carbide/Copper Hybrid Particles

2013 ◽  
Vol 721 ◽  
pp. 295-298
Author(s):  
Xiao Dan Li ◽  
Hai Jun Yin ◽  
Jun Ping Ma
Keyword(s):  
Aluminium Alloy ◽  
Stir Casting ◽  
High Energy ◽  
Matrix Composites ◽  
Hybrid Particles ◽  
Wear Properties ◽  
Energy Ball ◽  
Pre Treatment ◽  
Alloy 6061 ◽  
Properties Of Composites

Aluminium alloy 6061(AA6061) matrix composites were produced successfully by the stir casting method after a novel pre-treatment with reinforcements. The wear properties of composites were investigated. The results show that: the nanosilicon carbide (SiC) particles were embedded in solid copper (Cu) particles uniformly after 24 h of high-energy ball milling, and the hybrid reinforced particles uniformly dispersed in the Al matrix; The wear rate and the friction coefficient of the composites under various loads decreased as the reinforcements weight increased from 0.2% to 0.4%.

Evaluation of Mechanical Properties of Aluminum Alloy (Al2024) Reinforced with Silicon Carbide (SiC) Metal Matrix Composites

2017 ◽  
Vol 263 ◽  
pp. 184-188 ◽  
Author(s):  
P. Subramanya Reddy ◽  
R. Kesavan ◽  
B. Vijaya Ramnath
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Base Alloy ◽  
Stir Casting ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Casting Technique ◽  
Sic Particles

The investigation of mechanical properties of silicon carbide (SiC) powders reinforced with aluminum alloy composites are recorded in this paper. SiC powders of approximately 35µm size were added in an aluminum alloy matrix to manufacture the samples of ratios 1, 2, 3 and 4 by weight % using the stir casting technique. The specimens were fabricated and several tests were conducted to evaluate the mechanical properties such as tensile strength, hardness and impact strength and then the values are compared with the base alloy. It has been observed from the results that the hardness, impact energy and tensile strength increases with the increase in % of SiC particles until 2% and drops on further increase in the SiC particles.

scholarly journals FABRICATION AND WEAR PROPERTIES OF ZA-27 ALLOY MATRIX HYBRID COMPOSITE REINFORCED WITH NANOPARTICLES

2019 ◽  
Vol 11 (4) ◽  
pp. 446-454
Author(s):  
Dr. Fadhil Abbas Hashim ◽  
Dr. Niveen Jamal Abdulkader ◽  
Kateralnada Faris Hisham
Keyword(s):  
Metal Matrix ◽  
Hybrid Composites ◽  
Wear Test ◽  
Stir Casting ◽  
Nano Particles ◽  
Matrix Composites ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Casting Technique ◽  
Pin On Disk

In this research stir casting technique is used to produce (ZA-27)alloy hybrid composites reinforced by nano particles (BN and Si3N4) with various weight percentage.The wear test were used pin on disk for both (ZA-27) alloy and all composites.The results indicate that the value of hardness increased with increasing the additives of nano (BN and Si3N4) percentage for ZA-27 hybrid metal matrix composites. It was found that the nano particles play an important role in improving the wear properties of alloys. Since nano particles impede dislocations movement, causing enhancement in the mechanical properties.

Mechanical characterization of LM25 alloy matrix composite reinforced with boron carbide

2021 ◽  
pp. 002199832110055
Author(s):  
Zeeshan Ahmad ◽  
Sabah Khan
Keyword(s):  
Tensile Strength ◽  
Boron Carbide ◽  
Mechanical Characterization ◽  
Stir Casting ◽  
Surface Mapping ◽  
Alloy Matrix ◽  
Casting Technique ◽  
The Matrix ◽  
Carbide Particles

Alumnium alloy LM 25 based composites reinforced with boron carbide at different weight fractions of 4%, 8%, and 12% were fabricated by stir casting technique. The microstructures and morphology of the fabricated composites were studied by scanning electron microscopy and energy dispersive spectroscopy. Elemental mapping of all fabricated composites were done to demonstrate the elements present in the matrix and fabricated composites. The results of microstructural analyses reveal homogenous dispersion of reinforcement particles in the matrix with some little amount of clustering found in composites reinforced with 12% wt. of boron carbide. The mechanical characterization is done for both alloy LM 25 and all fabricated composites based on hardness and tensile strength. The hardness increased from 13.6% to 21.31% and tensile strength 6.4% to 22.8% as reinforcement percentage of boron carbide particles increased from 0% to 12% wt. A fractured surface mapping was also done for all composites.

An Investigation of Mechanical Properties on Aluminium 6061 Reinforced with Silicon Carbide - Metal Matrix Composites

2015 ◽  
Vol 787 ◽  
pp. 568-572 ◽  
Author(s):  
A. Radha ◽  
K.R. Vijayakumar
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Metal Matrix ◽  
Charpy Impact ◽  
Vortex Method ◽  
Weight Fraction ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
High Fatigue

Composite materials like Aluminium metal matrix composite is playing a very important role in manufacturing industries e.g. automobile and aerospace industries, due to their superior properties such as light weight, low density, high specific modulus, high fatigue strength etc., In this study Aluminium(Al 6061) is reinforced with Silicon Carbide particles and fabricated by Stir Casting Technique (vortex method). The MMC rectangular bars (samples) are prepared with Al6061 and SiC (28 µ size) as the reinforced particles by weight fraction from 0%, 5%, 10%, and 15% of SiC. The microstructure analysis and Mechanical properties like Tensile Strength, Vickers Hardness and Charpy Impact Strength were investigated on prepared specimens. It is observed that the properties are increased with increasing of reinforced specimens by weight fraction.

Al-SiC Nanocomposites Produced by Ball Milling and Spark Plasma Sintering

2013 ◽  
Vol 1513 ◽  
Author(s):  
R.C. Picu ◽  
J.J. Gracio ◽  
G.T. Vincze ◽  
N. Mathew ◽  
T. Schubert ◽  
...  
Keyword(s):  
Yield Stress ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
High Energy ◽  
Sic Nanoparticles ◽  
Sic Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball ◽  
Annealing Experiments

ABSTRACTIn this work Al-SiC nanocomposites were prepared by high energy ball milling followed by spark plasma sintering of the powder. For this purpose Al micro-powder was mixed with 50 nm diameter SiC nanoparticles. The final composites had grains of approximately 100 nm dimensions, with SiC particles located mostly at grain boundaries. To characterize their mechanical behavior, uniaxial compression, micro- and nano-indentation were performed. Materials with 1vol% SiC as well as nanocrystalline Al produced by the same means with the composite were processed, tested and compared. AA1050 was also considered for reference. It was concluded that the yield stress of the nanocomposite with 1 vol% SiC is 10 times larger than that of regular pure Al (AA1050). Nanocrystalline Al without SiC and processed by the same method has a yield stress 7 times larger than AA1050. Therefore, the largest increase is due to the formation of nanograins, with the SiC particles’ role being primarily that of stabilizing the grains. This was demonstrated by performing annealing experiments at 150°C and 250°C for 2h, in separate experiments.

Production of Al Metal Matrix Composites by the Stir-Casting Method

2013 ◽  
Vol 592-593 ◽  
pp. 614-617 ◽  
Author(s):  
Konstantinos Anthymidis ◽  
Kostas David ◽  
Pavlos Agrianidis ◽  
Afroditi Trakali
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Automobile Industry ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Casting Method ◽  
Alloy Matrix

It is well known that the addition of ceramic phases in an alloy e.g. aluminum, in form of fibers or particles influences its mechanical properties. This leads to a new generation of materials, which are called metal matrix composites (MMCs). They have found a lot of application during the last twenty-five years due to their low density, high strength and toughness, good fatigue and wear resistance. Aluminum matrix composites reinforced by ceramic particles are well known for their good thermophysical and mechanical properties. As a result, during the last years, there has been a considerable interest in using aluminum metal matrix composites in the automobile industry. Automobile industry use aluminum alloy matrix composites reinforced with SiC or Al2O3 particles for the production of pistons, brake rotors, calipers and liners. However, no reference could be cited in the international literature concerning aluminum reinforced with TiB particles and Fe and Cr, although these composites are very promising for improving the mechanical properties of this metal without significantly alter its corrosion behavior. Several processing techniques have been developed for the production of reinforced aluminum alloys. This paper is concerned with the study of TiB, Fe and Cr reinforced aluminum produced by the stir-casting method.

scholarly journals Preparation and Microstructure Characteristics of Aluminium 6061 Alloy Based Metal Matrix Composite

2019 ◽  
Vol 9 (2S4) ◽  
pp. 465-468
Keyword(s):  
Metallic Matrix ◽  
Weight Fraction ◽  
Stir Casting ◽  
Scientific Discipline ◽  
Carbide Powder ◽  
Matrix Composites ◽  
Metallic Matrix Composites ◽  
Casting Technique ◽  
Special Weight

The role of engineering substances within the improvement of cutting-edge era like metallic Matrix Composites (MMCs) have evoked a eager hobby nowadays for capacity programs in aerospace and car industries as a result of their advanced power. Aluminium (6061) and Boron Carbide (Powder) is chosen for reinforcement material and matrix respectively. Al–B4C composites containing special weight probabilities 3.5 %, 7.0% and 10.5% of B4C have been fabricated by way of stir casting Technique. Experiments are conducted with the aid of various weight fraction of B4C (3.5%, 7.0% and 10.5%), at the same time as maintaining all other parameters regular. The compositions of their small structural options are determined through scientific discipline magnifier..

Regression Modeling and Experimental Investigations on Ageing Behavior of Nano-Fly Ash Reinforced Al-10wt%Mg Alloy Matrix Composites

2018 ◽  
Vol 6 (2) ◽  
pp. 36-49
Author(s):  
Srinivasa Prasad Katrenipadu ◽  
Swami Naidu Gurugubelli
Keyword(s):  
Fly Ash ◽  
Regression Model ◽  
Weight Fraction ◽  
Stir Casting ◽  
Mg Alloy ◽  
Peak Hardness ◽  
Experimental Investigations ◽  
Matrix Composites ◽  
Casting Method ◽  
Alloy Matrix

Nano-fly ash particles reinforced Al-10wt%Mg alloy matrix composites produced by stir-casting method were tested for their ageing response. Ageing studies were performed at 160 °C, 200 °C and 240 °C temperatures and a maximum peak hardness of 142 VHN was observed during ageing at 200 °C for the composite with 10 wt% nano fly ash reinforcement. This is due to rapid nucleation and growth of βI particles at this temperature. Experiments were designed for different compositions and different ageing temperatures on the basis of the Design of Experiments technique. The factorial design is considered to improve the reliability of results and to reduce the size of experimentation without loss of accuracy. A model to predict the ageing behaviour of the composites was developed with the terms of 5, 10 and 15% weight fraction of fly ash at 160 °C, 200 °C and 240 °C ageing temperatures. The developed regression model was validated by statistical software MINITAB-R17.1.0. It was found that the developed regression model could be effectively used to predict the ageing behavior at 95% confidence level.

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