Effect of reinforcement volume fraction on mechanical alloying of Al–SiC nanocomposite powders

2007 ◽  
Vol 50 (3) ◽  
pp. 276-282 ◽  
Author(s):  
S. Kamrani ◽  
A. Simchi ◽  
R. Riedel ◽  
S. M. Seyed Reihani
Keyword(s):  
Mechanical Alloying ◽  
Volume Fraction ◽  
Nanocomposite Powders

The Effect of Reinforcement Phase on the Microstructure of Al-SiC Nanocomposite Powder Prepared via Mechanical Alloying

2009 ◽  
Vol 83-86 ◽  
pp. 764-770
Author(s):  
Taha Rostamzadeh ◽  
H. Shahverdi ◽  
R. Sarraf-Mamoory ◽  
A. Shanaghi
Keyword(s):  
Electron Microscopy ◽  
Mechanical Alloying ◽  
Metal Matrix ◽  
Milling Time ◽  
Lattice Strain ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
High Energy ◽  
Nanocomposite Powder ◽  
Nanocomposite Powders

Mechanical alloying is one of the most successful methods for the manufacturing of metal matrix nanocomposite powders. In this study, Al/SiC metal matrix composite (MMCp) powders with volume fractions of 5, 10, and 15 percent SiC were successfully obtained after milling the powder for a period of 25 hours at a ball to powder ratio of 15:1 using high energy planetary milling. The Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were conducted to investigate the lattice strain of the matrix phase and the microstructure of the nanocomposite powders after 1, 10, and 25 hours of milling time. Also, the morphology of the Al-5%SiC nanocomposite powder was investigated using transmission electron microscopy (TEM). The results show that with the increase of both milling time and the reinforcement phase volume fraction, the lattice strain increases and the average size of aluminum phase crystallites decreases. Eventually, after 25 hours of milling, the nanocomposite powders show a spherical-like morphology and SiC particles were distributed in an aluminum matrix with appropriate order.

Study on Mechanical Alloying of TiB2 Particulate Reinforced Titanium Matrix Composites

2018 ◽  
Vol 875 ◽  
pp. 41-46 ◽  
Author(s):  
Yue Ying Li ◽  
Fu Wen Zhu ◽  
Zhen Liang Qiao
Keyword(s):  
Mechanical Alloying ◽  
Milling Time ◽  
Volume Fraction ◽  
Matrix Composites ◽  
Titanium Matrix ◽  
Titanium Matrix Composites ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder Particles ◽  
Particulate Reinforced

TiB2 particulate reinforced titanium matrix composites were prepared by mechanical alloying and spark plasma sintering. Volume fraction of TiB2 powders in the composites are 5%, 10%, 15%. The effect of milling time and the volume fraction of reinforcement on microstructure and properties of the composites were studied. The results show that with increasing milling time, the size of powder particles decreases, quantity of them increases, and microstructure of the sintered samples becomes finer and more uniform. When milling time reaches 30h, the trend of powder agglomeration increases, the downward trend of the particle size becomes slowly. With the milling time, the density of titanium matrix composites is on the rise. The density of 10vol%TiB2 particulate reinforced titanium matrix composites can reach 4.799 g/cm3, with 30h milling time and sintering at 900°C. The density and hardness of the composites increase with increasing the volume fraction of TiB2. When the volume fraction of TiB2 is 15%, after milling 10h and sintered at 800°C, the density and hardness of the composites can reach 4.713g/cm3 and HV851.58.

An investigation into the wear behaviour of TiB2 particle reinforced aluminium composites produced by mechanical alloying

2011 ◽  
Vol 18 (1-2) ◽  
pp. 5-12 ◽  
Author(s):  
Dursun Ozyurek ◽  
Ibrahim Ciftci
Keyword(s):  
Mechanical Alloying ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
A356 Alloy ◽  
Tib2 Particle ◽  
Wear Behaviour ◽  
Wear Loss ◽  
Mechanically Alloyed ◽  
Particle Volume ◽  
Alloy Matrix

AbstractIn this study, wear behaviour of TiB2 particle reinforced aluminium (Al) composites produced by the mechanical alloying method was investigated. TiB2 ceramic particles of four different volume fractions were mechanically alloyed with Al and A356 alloy matrix materials. The mechanically alloyed particles were cold presses and then sintered at 550°C. After the sintering process, the composites were characterised through hardness measurements, scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Wear tests were also carried out on a pin-on-disc type wear apparatus under 10, 25 and 50 N loads. Wear loss of the composites were found to decrease with increasing hardness which increased with increasing TiB2 particle volume fraction. However, increasing the applied load and sliding distance increased the wear loss. Wear surface examinations showed that various wear mechanisms were effective in wear of the composites.

Production of copper–niobium carbide nanocomposite powders via mechanical alloying

2005 ◽  
Vol 399 (1-2) ◽  
pp. 382-386 ◽  
Author(s):  
M.T. Marques ◽  
V. Livramento ◽  
J.B. Correia ◽  
A. Almeida ◽  
R. Vilar
Keyword(s):  
Mechanical Alloying ◽  
Niobium Carbide ◽  
Nanocomposite Powders

Synthesis of novel CuSn 10 ‐graphite nanocomposite powders by mechanical alloying

2014 ◽  
Vol 9 (2) ◽  
pp. 109-112 ◽  
Author(s):  
A. Canakci ◽  
T. Varol ◽  
H. Cuvalci ◽  
F. Erdemir ◽  
S. Ozkaya ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Nanocomposite Powders

Effect of WC content on glass formation, thermal stability, and phase evolution of a TiNbCuNiAl alloy synthesized by mechanical alloying

2008 ◽  
Vol 23 (3) ◽  
pp. 745-754 ◽  
Author(s):  
Y.Y. Li ◽  
C. Yang ◽  
W.P. Chen ◽  
X.Q. Li
Keyword(s):  
Thermal Stability ◽  
Mechanical Alloying ◽  
Volume Fraction ◽  
High Volume ◽  
Supercooled Liquid ◽  
Phase Evolution ◽  
Supercooled Liquid Region ◽  
Glassy Matrix ◽  
Liquid Region ◽  
The Matrix

Amorphous Ti66Nb13Cu8Ni6.8Al6.2 alloy powders with different tungsten carbide (WC) contents were synthesized by mechanical alloying. Outstanding differences in particle size, thermal stability, glass-forming ability, and phase evolution are found for the synthesized Ti-based glassy powders with different WC contents. This is attributed to the fact that the WC was partially alloyed into the glassy matrix and the matrix element Ti was also partially alloyed into the WC particles. The obtained glassy powders exhibit a wide supercooled liquid region above 64 K. Meanwhile, the main crystalline phase is the ductile β-Ti with a high volume fraction in the crystallized alloy powders. These two aspects offer the possibility of easily preparing a plasticity-enhanced bulk composite in the supercooled liquid region by powder metallurgy, which couples the nanosized WC particles with in situ precipitated ductile β-Ti phase.

scholarly journals Synthesis, Characterization and Mechanical Behaviour of Al2O3, TiO2, and Cu Reinforced Al 7068 Nanocomposites

2020 ◽  
Vol 7 ◽  
Author(s):  
V. Sathiyarasu ◽  
D. Jeyasimman ◽  
L. Chandra Sekaran
Keyword(s):  
Mechanical Alloying ◽  
Gas Flow ◽  
Research Work ◽  
Exothermic Reaction ◽  
Milled Powder ◽  
Hardness Test ◽  
Matrix Composites ◽  
Weight Percentage ◽  
Transmission Electron ◽  
Nanocomposite Powders

This present research work aims at fabrication of AA7068 metal matrix composite reinforced with a different weight percentage of Al2O3, TiO2 and Cu (0 wt.%, 2 wt.%, and 4 wt.%) nanopowders through mechanical alloying of 30 hrs which is produced using powder metallurgy route. The consolidation pressure of 500 MPa was applied for compaction of the composite and sintered at a temperature of 600°C for two hrs in the presence of argon gas flow. An XRD result reveals that there are no intermetallic compounds formed in the milled powder after 30 hr of mechanical alloying. The reinforcement particles were well embedded and uniformly distributed in matrix composites was confirmed by bright-field emission transmission electron microscopy (FETEM) image and selected area diffraction (SAD) ring pattern. From the DSC curve of AA 7068–2.0 wt. % Al2O3, TiO2 and Cu nanocomposite powders after 30 hrs of mechanical alloying., the endothermic peak at 536.85°C corresponds to the melting of aluminium which was followed by a steady-state exothermic reaction at 579.51°C was obtained. The green density and sintered density of prepared nanocomposites were calculated and compared. Brinell hardness test has been conducted and the maximum value of 192 BHN was obtained by adding a weight percentage of 2 wt. % of Al2O3, TiO2 and Cu particles.

scholarly journals Synthesis of TiB2-Ni3B Nanocomposite Powders by Mechanical Alloying

2018 ◽  
Author(s):  
Jorge Morales Hernández ◽  
Verónica N. Martínez Escobedo ◽  
Héctor Herrera Hernández ◽  
José M. Juárez García ◽  
Joel Moreno Palmerin
Keyword(s):  
Mechanical Alloying ◽  
Nanocomposite Powders
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