Influence of preheating temperatures and adding rates on distributions of fly ash in aluminum matrix composites prepared by stir casting

2015 ◽  
Vol 16 (7) ◽  
pp. 1321-1327 ◽  
Author(s):  
Shueiwan H. Juang ◽  
Liang-Jing Fan ◽  
Hung Po Ou Yang
Keyword(s):  
Fly Ash ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites

scholarly journals Mechanical Properties, Tribology and Electrochemical Studies of Al/Fly Ash/Eggshell Aluminium Matrix Composite

2021 ◽  
Vol 12 (4) ◽  
pp. 4900-4919
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Aluminum Matrix ◽  
Weight Fraction ◽  
Xrd Analysis ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Cast Aluminum ◽  
Aluminium Matrix Composite

This work was carried out to investigate the effect of carbonized eggshells (CES) and fly ash on the microstructure, mechanical properties, wear, and corrosion characteristics of Al-Si12. The weight fraction (wt.%) of the CES particles was kept constant at 2.5 wt.%, while that of fly ash was varied at 2.5 wt.%, 5.0 wt.%, 7.5 wt.%, and 10.0 wt.%. The selected fabrication route was stir casting. The x-ray diffraction (XRD) analysis of the cast aluminum matrix composites (AMCs) revealed the presence of phases including α-aluminum, SiO2, and Si with the formation of the intermetallic CuAl2 phase. The microhardness of the cast samples increased with increasing weight fraction of the reinforcements up to the 7.5 wt.% fly ash sample. The tensile strength and compressive strength were highest for the 2.5 wt.%/CES 2.5 wt.%. Tribology studies showed that the lowest wear rate of 4.91 × 10-5 mm3/Nmm was obtained for the 2.5 wt.% fly ash sample, while the corrosion studies showed that the corrosion rate of 2.70 × 10-5 g/hr was lowest for the 2.5 wt.% fly ash as well.

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.

Low-cost, fly-ash-containing aluminum-matrix composites

JOM ◽  
1994 ◽  
Vol 46 (11) ◽  
pp. 55-59 ◽  
Author(s):  
Pradeep K. Rohatgi
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites

Wear Resistance of Graphite / Aluminium Composites that Prepared by Stirring Casting

2013 ◽  
Vol 683 ◽  
pp. 333-338 ◽  
Author(s):  
Lin Li Wu ◽  
Wen Jing Yang ◽  
Jian Rong Xu ◽  
Guang Chun Yao
Keyword(s):  
Friction Factor ◽  
Dry Friction ◽  
Relative Rate ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Bulk Alloy ◽  
Friction Behavior ◽  
Graphite Particles

The graphite reinforced aluminum matrix composites were prepared by using stir-casting in this paper, with bulk alloy of ZL111, reinforcement of graphite particles coated with oxide, and the friction behavior was investigated perfectly. The results indicated that, the aluminum matrix composites reinforced with 6 wt.% graphite particles coated with oxide have a good property of self-lubrication under the condition of dry friction with a pressure of 40 N, a relative rate of 2.62 m/s of frictional backing gear, a wear time of 60 min, in addition, the friction factor and the wear capacity of the graphite / aluminum matrix composites were less than those of bulk alloy. Moreover, the friction factor and the wear capacity of the graphite / aluminum matrix composites decreased with an increase in mass fraction of the graphite coated with oxide, and the friction factor of composites became bigger while the fraction of the graphite particles was over 6wt.%.

Characterization of Al Metal Matrix Composites Produced by the Stir-Casting Method

2013 ◽  
Vol 577-578 ◽  
pp. 85-88
Author(s):  
K.G. Anthymidis ◽  
Kostas David ◽  
A. Trakali ◽  
P. Agrianidis
Keyword(s):  
Composite Materials ◽  
Metal Matrix Composites ◽  
Automobile Industry ◽  
Metal Matrix ◽  
Spray Deposition ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Structural Features ◽  
Aluminum Matrix Composites ◽  
Matrix Composites

Composite materials which main constituent part is a metal are called Metal Matrix Composites (MMCs). The other compounds may be metals too, ceramics or even organics. They are well known for their excellent thermo-physical and mechanical properties. Reinforcement is used to improve different properties of the main material, such as wear resistance, hardness, fatigue resistance, friction coefficient, thermal conductivity and others. As a result, during the last years, MMCs have found a lot of application in automobile industry for the production of brakes and parts of engines and in aerospace industry for the production of structural components, as well as in electrical and electronic industry and in many other applications. MMCs can be produced by many ways, such as, powder blending and consolidation, foil diffusion bonding, electroplating, spray deposition, stir-casting and others. In this research stir-casting was used as processing technique for the production of Aluminum matrix composites reinforced by ceramic particles and iron. The morphologies of the produced composite materials were examined using optical and SEM microscopy. The compositions of their micro structural features were determined by EDX spectroscopy. The phases formed were determined by XRD techniques. In the tribological tests, under dry wear conditions, the as-produced composites materials showed significant increased resistance to wear compared to pure Al metal.

Influence of Ti and Zn on Particle Incorporation of AlB2, B and B4C Particles in Aluminum Using the Stir Casting Process

2017 ◽  
Vol 742 ◽  
pp. 173-180
Author(s):  
Steven Plötz ◽  
Andreas Lohmüller ◽  
Robert F. Singer
Keyword(s):  
Liquid Aluminum ◽  
Aluminum Matrix ◽  
Casting Process ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Gas Entrapment ◽  
Particle Incorporation ◽  
Particle Feeding ◽  
Partial Vacuum

The outstanding performance of many aluminum matrix composites (AMCs) regarding specific stiffness makes AMCs attractive materials for lightweight construction. Low density boride compounds promise both an increase in stiffness and decrease in composite density. Therefore for this study AlB2, B and B4C were chosen for composite manufacturing. The composites were fabricated with the stir casting process. To avoid gas entrapment during mixing and ensure nonporous composites, partial vacuum was adapted during particle feeding and stirring. Poor wettability of used particle material in contact with liquid aluminum hindered particle incorporation, but alloying elements such as titanium were shown to affect wettability and particle incorporation for B4C. Zn had no influence on wettability or reactivity and did not improve particle incorporation. In contrast to Zn, Ti improved adhesion and wettability, but particle incorporation was improved exclusively for B4C. Besides alloying Ti, the use of high-shear force mixers improved particle incorporation enabling uniform particle distribution. AMCs with up to 12 vol.% of B4C particles were produced via stir casting without alloying Ti.

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