Nanostructured Al Powder Obtained by High Energy Ball Milling at Ambient and Cryogenic Temperatures

2014 ◽  
Vol 802 ◽  
pp. 125-129
Author(s):  
Heronilton Mendes de Lira ◽  
Pilar Rey Rodriguez ◽  
Oscar Olimpio de Araújo Filho ◽  
Cezar Henrique Gonzalez ◽  
Severino Leopoldino Urtiga Filho
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
High Performance ◽  
Pure Aluminum ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Nanocrystalline Powders ◽  
Protective Atmosphere ◽  
Energy Ball ◽  
Size And Morphology

High performance nanostructured light metals and alloys are very interesting for replacing conventional heavier materials in many industrial components. High Energy Ball Milling and Cryomilling are useful techniques to obtain nanocrystalline powders. In this work the effect of several milling conditions such as rotation speed, time, ball to powder ratio and temperature on the crystallite and particle size and morphology in pure aluminum are presented. X-Ray Diffraction, Laser Diffraction and Scanning Electron Microscopy are used. High energy ball milling at ambient and cryogenic temperature of Al powders rapidly leads to a nanometer size down to about 35 nm. High ball to powder ratio promotes both low crystallite and particle size. Small crystallite size like 18 nm and particle size as 4 μm were achieved in the most energetic conditions at ambient temperature. Isopropyl alcohol used as liquid media and protective atmosphere has a strong influence on the results depending on the milling temperature of Al.

scholarly journals Effect of the route and sintering time in the microstructure of pure aluminum prepared by high energy ball milling

2021 ◽  
Vol 27 (S1) ◽  
pp. 3294-3296
Author(s):  
José Mendoza ◽  
C. Carreño-Gallardo ◽  
I. Estrada-Guel ◽  
C.G. Garay-Reyes ◽  
M.A. Ruiz-Esparza-Rodriguez ◽  
...  
Keyword(s):  
Ball Milling ◽  
Pure Aluminum ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Sintering Time ◽  
Energy Ball

SnSb/TiO2/C nanocomposite fabricated by high energy ball milling for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32462-32466 ◽  
Author(s):  
Haihua Zhao ◽  
Wen Qi ◽  
Xuan Li ◽  
Hong Zeng ◽  
Ying Wu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Ball Milling ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Li Ion Batteries ◽  
Energy Ball ◽  
Li Ion

Alloy anodes for Li-ion batteries (LIBs) have attracted great interest due to their high capacity.

Synthesis, Characterization, and ECAP Consolidation of Carbon Nanotube Reinforced AA 4032 Nanocrystalline Composites Produced by High Energy Ball Milling

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
M. S. Senthil Saravanan ◽  
S. P. Kumaresh Babu
Keyword(s):  
Carbon Nanotubes ◽  
Crystallite Size ◽  
Ball Milling ◽  
Base Alloy ◽  
Arc Discharge ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Nanocrystalline Powders ◽  
Peak Broadening ◽  
Energy Ball

In the present work, multiwalled carbon nanotubes (MWNTs) were synthesized by electric arc discharge method in open air atmosphere. The synthesized nanotubes were subjected to multistep purification followed by characterization using Raman spectroscopy and transmission electron microscopy (TEM). These carbon nanotubes (CNTs) have inner and outer diameters of the order of 3.5 nm and 16 nm with an aspect ratio of 63. AA 4032 nanocomposites reinforced with MWNTs were produced by high energy ball milling using elemental powder mixtures. X-ray diffraction (XRD) and scanning electron microscope (SEM) studies showed different phases of composite with and without CNTs. The crystallite size and lattice strain were calculated using an anisotropic model of Williamson–Hall peak broadening analysis, which showed in decreased crystallite size with increasing milling time. TEM studies reveal that the MWNTs were uniformly distributed in the matrix. Thermal stability of the nanocrystalline powders was studied using a differential thermal analyzer (DTA). The mechanically alloyed powders were consolidated using a novel method called equal channel angular pressing (ECAP) at room temperature. The consolidated samples were sintered at 480 °C in argon atmosphere for 90 min. ECAP method was investigated as an alternative to conventionally sintered powder composites. CNT addition has shown significant improvement in the hardness of the system, even though the observed density is relatively low compared with a base alloy. Thus, the results show that ECAP enables sufficient shear deformation results in good metallurgical bonds between particles at lower compaction pressures. Hence, it is proven that ECAP can be effectively used as one of the consolidation technique especially for powders that are difficult to consolidate by other means.

High Energy Ball-Milling of Tin Titanate Zirconate for Use in Microwave Applications

2006 ◽  
Vol 45 ◽  
pp. 480-485 ◽  
Author(s):  
V.L. Arantes ◽  
Dulcina P.F. Souza
Keyword(s):  
Particle Size ◽  
Dielectric Properties ◽  
Ball Milling ◽  
High Energy ◽  
Liquid Phase Sintering ◽  
High Energy Ball Milling ◽  
X Ray Diffraction ◽  
Microwave Frequencies ◽  
Particle Size Analyzer ◽  
Energy Ball

Tin titanate zirconate (ZTS) is widely known for its good dielectric properties at high frequencies and has been widely employed as a dielectric resonator. ZTS does not sinter easily by solid state difusion and it is necessary to introduce sintering aids capable of increasing diffusion coefficients and/or leading to liquid phase sintering. Consequently, the dielectric properties in microwave frequencies can be reduced. This work focused on the utilization of high energy ball-milling as a method of reducing initial particle size and further improving sintering of ZTS.The powders obtained were characterized by X-ray diffraction as a function of milling time, as well as by a light scattering particle size analyzer.

scholarly journals the role of different high energy ball milling conditions of molybdenum powder on the resulting particles size and morphology

2019 ◽  
Author(s):  
Lucie DYČKOVÁ ◽  
Mariano CASAS LUNA ◽  
Jorge Alberto TORRES RODRÍGUEZ ◽  
Martin DYČKA ◽  
David JECH ◽  
...  
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Molybdenum Powder ◽  
Energy Ball ◽  
Size And Morphology

Reducing the crystallite and particle size of SrFe12O19 with PVA by high energy ball milling

2019 ◽  
Vol 771 ◽  
pp. 464-470 ◽  
Author(s):  
F.N. Tenorio Gonzalez ◽  
I.R. Barajas Rosales ◽  
P. Vera Serna ◽  
F. Sánchez de Jesus ◽  
A.M. Bolarin Miró ◽  
...  
Keyword(s):  
Particle Size ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball

Mechanochemically synthesized m-BiVO4 nanoparticles for visible light photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15796-15802 ◽  
Author(s):  
Q. Luo ◽  
L. Zhang ◽  
X. Chen ◽  
O. K. Tan ◽  
K. C. Leong
Keyword(s):  
Particle Size ◽  
Visible Light ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Visible Light Photocatalysis ◽  
Energy Ball ◽  
Photocatalytic Applications

Mechanochemical high energy ball milling approach was used to synthesize monoclinic BiVO4 (m-BiVO4) nanoparticles in an attempt to simultaneously reduce the particle size and improve the throughput for practical photocatalytic applications.

Structure and Magnetic Properties of NdFeB Powder Prepared by Hydrogen Decrepitation and High-Energy Ball Milling

2014 ◽  
Vol 604 ◽  
pp. 262-266 ◽  
Author(s):  
Zoryana Mural ◽  
Lauri Kollo ◽  
Rainer Traksmaa ◽  
Kaspar Kallip ◽  
Joosep Link ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Ball Milling ◽  
Magnetic Moments ◽  
Weight Ratio ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Final Particle ◽  
Energy Ball ◽  
Hydrogen Decrepitation

An ingot of NdFeB alloy was disintegrated by hydrogen decrepitation (HD). High-energy ball milling technique with hard metal milling elements and balls was employed to refine HD powders down to particle size optimum for magnet processing. The experiments were performed according to experimental plan to optimize the milling parameters regarding particle size, contamination and magnetic properties of the powder. The effect of milling time, speed of rotation, ball-powder weight ratio (BPR) and amount of wet agent was investigated. The highest influence was shown to be from attritor speed of rotation, ball-to powder ratio and combined effect of milling wet agent and rotating speed. Unified parameter of estimated number of total ball impacts was calculated, which allows predicting the final particle size of the powder at different milling speeds. Magnetic moments of powders were measured.

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