Structural characterization of AA 2024-MoSi 2 nanocomposite powders produced by mechanical milling

Published on Mar 8, 2013in International Journal of Minerals Metallurgy and Materials1.713
· DOI :10.1007/S12613-013-0727-2
Mahmood Sameezadeh3
Estimated H-index: 3
(UT: University of Tehran),
Hassan Farhangi11
Estimated H-index: 11
(UT: University of Tehran),
Massoud Emamy25
Estimated H-index: 25
(UT: University of Tehran)
Nano-sized MoSi2 powder was produced successfully from commercially available MoSi2 by a mechanical milling process carried out for 100 h, and mechanical alloying was employed to synthesize AA 2024-MoSi2 nanocomposites. The effects of MoSi2 reinforcement and mechanical milling on the structure, morphology, and iron contamination of the produced materials were investigated using X-ray diffraction, scanning electron microscopy, and atomic absorption spectrometry. It is revealed that the morphology of the aluminum alloy changes continuously during milling from spherical to plate-like, irregular, and finally equiaxed. The presence of MoSi2 reinforcement accelerates the milling process and results in a smaller average particle size. The Williamson-Hall method determined that the crystallite size of the aluminum alloy in the composite powder is smaller than that of the unreinforced alloy at the same milling time and this size reaches 45 nm after 16 h milling time. The Fe contamination content is higher for the nanocomposite in comparison with the unreinforced alloy because of the wearing role of MoSi2 hard particles.
📖 Papers frequently viewed together
25 Citations
1 Citations
#1J. Corrochano (CSIC: Spanish National Research Council)H-Index: 6
#2Marcela Lieblich (CSIC: Spanish National Research Council)H-Index: 18
Last. Joaquín Ibáñez (CSIC: Spanish National Research Council)H-Index: 20
view all 3 authors...
Abstract Six hot extruded Al–Mg–Si composites reinforced with 15 vol.% of MoSi 2 intermetallic particles were processed by powder metallurgy, varying reinforcement size and high energy ball milling time. The relation between these parameters and matrix microstructure, final reinforcement size and particle distribution has been investigated. Reinforcement distribution was quantified through the coefficient of variation of the mean near-neighbour distance, COV( λ m ), which demonstrated to be the ...
33 CitationsSource
#1J. Corrochano (CSIC: Spanish National Research Council)H-Index: 6
#2John Walker (University of Southampton)H-Index: 18
Last. W.M. Rainforth (University of Sheffield)H-Index: 48
view all 5 authors...
The effect of the microstructure on the dry sliding wear of six aluminium alloy 6061 matrix composites reinforced with 15 vol.% of MoSi2 particles and two monolithic 6061 alloys processed by powder metallurgy with and without ball milling has been studied. Wear testing was undertaken using pin-on-ring configuration against an M2 steel counterface at 0.94 m/s and normal load of 42, 91 and 140 N. The wear resistance of the aluminium alloys was significantly improved by ball milling and the additio...
34 CitationsSource
#1Mahmood Sameezadeh (UT: University of Tehran)H-Index: 3
#2Massoud Emamy (UT: University of Tehran)H-Index: 25
Last. Hassan Farhangi (UT: University of Tehran)H-Index: 11
view all 3 authors...
Abstract In this study, nanocomposites of AA 2024 aluminum alloy matrix reinforced with different volume fractions of nanometric MoSi 2 intermetallic particles ranging from 0 to 5%, were produced using mechanical alloying technique. For comparison, samples without reinforcing particles and mechanical alloying and a sample with micrometric MoSi 2 particles were also synthesized. The prepared composite powders were consolidated by cold and hot pressing and then heat treated to solution and aged co...
62 CitationsSource
#1H. Asgharzadeh (Sharif University of Technology)H-Index: 18
#2Abdolreza Simchi (Sharif University of Technology)H-Index: 59
Last. Hyoung Seop Kim (POSTECH: Pohang University of Science and Technology)H-Index: 64
view all 3 authors...
Ultrafine-grained (UFG) Al6063 alloy reinforced with 0.8 vol% nanometric alumina particles (25 nm) was prepared by reactive mechanical alloying and direct powder extrusion. Transmission electron microscopy and electron backscatter diffraction analysis showed that the grain structure of the nanocomposite composed of nanosize grains ( 1 μm) with random orientations. Mechanical properties of the material were examined at room and high temperatures by compression test. It was found that the yield st...
19 CitationsSource
#1Min Song (CSU: Central South University)H-Index: 39
#2Yuehui He (CSU: Central South University)H-Index: 33
Last. Shanfeng Fang (CSU: Central South University)H-Index: 2
view all 3 authors...
This article develops a constitutive model for the yield stress of SiC reinforced aluminum alloy composites based on the modified shear lag model, Eshelby’s equivalent inclusion approach, and Weibull statistics. The SiC particle debonding and cracking during deformation have been incorporated into the model. It has been shown that the yield stress of the composites increases as the volume fraction and aspect ratio of the SiC particles increase, while it decreases as the size of the SiC particles...
19 CitationsSource
#1J. Corrochano (CSIC: Spanish National Research Council)H-Index: 6
#2Marcela Lieblich (CSIC: Spanish National Research Council)H-Index: 18
Last. Joaquín Ibáñez (CSIC: Spanish National Research Council)H-Index: 20
view all 3 authors...
Abstract Six Al–Mg–Si composites reinforced with 15 vol.% of MoSi2 intermetallic particles, together with three unreinforced monolith Al–Mg–Si (AA6061) alloys have been processed by powder metallurgy to quantify the roles of alloy matrix grain size and reinforcement particle on their solutionized hardness and ageing response. In the range studied, hardness of solutionized composites follows a Hall–Petch mechanism. Moreover, it can be rationalised as the sum of the hardness of the alloy matrix wi...
30 CitationsSource
#1Mehrdad Khakbiz (UT: University of Tehran)H-Index: 12
#2Farshad Akhlaghi (UT: University of Tehran)H-Index: 18
Abstract This paper consists of two parts. In the first part, attrition milling of commercially available (0.7 μm) boron carbide (B 4 C) particles was optimized to prepare B 4 C nano-particles. In the second part of the study, mechanical alloying was successfully employed to synthesize metal matrix composite powders with a nanocrystalline Al 6061 alloy as the matrix and B 4 C as the reinforcement. Different amounts of B 4 C particles (5 wt.% and 10 wt.%) having various sizes of 90 nm (produced i...
167 CitationsSource
#1Bahman Nasiri-Tabrizi (IAU: Islamic Azad University)H-Index: 22
#2Pezhman Honarmandi (Sharif University of Technology)H-Index: 2
Last. Peyman Honarmandi (MIT: Massachusetts Institute of Technology)H-Index: 8
view all 4 authors...
Single-crystal hydroxyapatite (HAp) nanorods and nanogranules have been synthesized successfully by a mechanochemical process using two distinct experimental procedures. The experimental outcomes are characterized by transmission electron microscopy (TEM), and powder X-ray diffraction (XRD) techniques. In this work, the feasibility of using polymeric milling media to prepare hydroxyapatite nanoparticles is described. The resulting hydroxyapatite powder exhibits an average size of about 20 to 23 ...
137 CitationsSource
#1Nader Parvin (AUT: Amirkabir University of Technology)H-Index: 25
#2R. Assadifard (AUT: Amirkabir University of Technology)H-Index: 1
Last. P. Marashi (AUT: Amirkabir University of Technology)H-Index: 2
view all 5 authors...
Abstract In this paper, an Al6061–10 wt% SiC composite was prepared using the mechanical alloying route. The morphology and the structure of the prepared powder, which change with milling time, were evaluated using scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques, respectively. Moreover, the relationships among the stages of mechanical alloying (MA), relative density and hardness of both pressed and hot extruded materials were investigated. The morphological evolutions s...
90 CitationsSource
#1Hamid Abdoli (Sharif University of Technology)H-Index: 10
#2E. SalahiH-Index: 18
Last. K. Pourazrang (Sharif University of Technology)H-Index: 2
view all 4 authors...
Abstract High-energy milling technique was used to synthesize Al–10 wt.%AlN-nanostructured composite powder in a planetary ball-mill under argon atmosphere up to 25 h. To show the role of AlN particles, process was conducted for monolithic aluminum. The changes in powder characteristics were investigated by time. Microstructure of powders was studied after different milling times by scanning electron microscope (SEM). The morphological evolutions showed that relative equiaxed powder could be syn...
69 CitationsSource
Cited By6
#1Emre Tekoğlu (ITU: Istanbul Technical University)H-Index: 4
#2Yakup Yürektürk (Bursa Technical University)H-Index: 4
Last. M. Lütfi Öveçoğlu (ITU: Istanbul Technical University)H-Index: 16
view all 6 authors...
Abstract The purpose of this research is to investigate the dual effect of silicide (MoSi2 or WSi2) and LaB6 reinforcing particles on the microstructural and mechanical properties of Al-7 wt% Si (Al7Si) matrix. Hypoeutectic Al7Si blends prepared from elemental Al and Si powders were mechanically alloyed (MA’d) for 12 h in a planetary ball mill (at 300 rpm). Afterwards, 2 wt% silicide reinforcements (MoSi2 or WSi2) with various particle size distributions (micron, bimodal, submicron) were separat...
4 CitationsSource
#1Mohammad Raei (IUT: Isfahan University of Technology)H-Index: 3
#2Masoud Panjepour (IUT: Isfahan University of Technology)H-Index: 13
Last. Mahmood Meratian (IUT: Isfahan University of Technology)H-Index: 17
view all 3 authors...
A new method was applied to produce an Al-0.5wt%Ti-0.3wt%Zr/5vol%B4C composite via stir casting with the aim of characterizing the microstructure of the resulting composite. For the production of the composite, large B4C particles (larger than 75 μm) with no pre-heating were added to the stirred melt. Reflected-light microscopy, X-ray diffraction, scanning electron microscopy, field-emission scanning electron microscopy, laser particle size analysis, and image analysis using the Clemex software ...
4 CitationsSource
#1Mahmood SameezadehH-Index: 3
#2Massoud Emamy (UT: University of Tehran)H-Index: 32
Last. Hassan FarhangiH-Index: 11
view all 3 authors...
Nanocomposites of 2024 aluminum–MoSi2 were prepared using mechanical alloying method followed by cold and hot pressing. Influences of volume fraction and distribution of nanosized MoSi2 reinforcement on mechanical properties of the composites were investigated. Microstructural characterization was carried out by scanning electron microscopy and energy dispersive spectroscopy. Mechanical properties of the nanocomposites were evaluated via hardness, wear, and also room and high temperature compres...
4 CitationsSource
#1Mahmood Sameezadeh (Shahid Beheshti University)H-Index: 3
#2Hassan Farhangi (UT: University of Tehran)H-Index: 11
Last. Massoud Emamy (UT: University of Tehran)H-Index: 32
view all 3 authors...
Nanocomposites of AA 2024 aluminum alloy matrix reinforced with nano-sized MoSi2 particles were produced using mechanical alloying method followed by cold and hot pressing. Phase stability analysis, hardness, and room temperature compression tests of the composites were performed. In addition, absorb energy calculation and fracture behavior evaluation of the compression test specimens were carried out. The results indicated that the composite constituents exhibit good stability during the high t...
2 CitationsSource
#1Masoud SakakiH-Index: 7
#2M. Sh. Bafghi (IUST: Iran University of Science and Technology)H-Index: 11
Last. J. Vahdati KhakiH-Index: 16
view all 3 authors...
AbstractIt has been shown earlier that formation of undesirable W2C phase during mechanochemical synthesis of WC–Al2O3 composites from WO3–Al–C mixture is due to high temperatures caused by the large heat release during the initial aluminothermic reduction of WO3. With the aim of preventing the formation of W2C, in this study, Al2O3 was added to lower the reaction temperature. Thermodynamic calculations showed that Al2O3 presence in WO3/2Al/C/xAl2O3 mixtures would lower the adiabatic temperature...
6 CitationsSource