Results 261 to 270 of about 18,996,701 (296)

High-energy ball milling of Al2O3–TiO2 powders

Journal of Alloys and Compounds, 2007
High-energy ball milling of Al2O3–13 wt% TiO2 and Al2O3–44 wt% TiO2 powders have been studied and more precisely the effect of the addition of a milling agent and the relative speed of the vials. The evolution of the microstructure of the milled powders has been studied by X-ray diffraction and the evolution of the specific surface areas has been ...
S. Coste, G. Bertrand, C. Coddet, E. Gaffet, H. Hahn, H. Sieger   +5 more
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Nanostructured Fe obtained by high-energy ball milling

Journal of Magnetism and Magnetic Materials, 2006
Abstract A detailed microstructural study of nanocrystalline Fe powder samples, obtained by mechanical attrition, was carried out by X-ray diffraction experiments as a function of the milling time. During the process, the exchange energy between the vessels, balls and Fe powders leads to a change of the Fe microstructure: in particular, a significant
D. Martínez-Blanco, P. Gorria, J.A. Blanco   +2 more
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Synthesis of Nd0.7Sr0.3MnO3 ceramics by high-energy ball milling

Journal of Alloys and Compounds, 2008
Abstract Strontium doped perovskite-type manganite Nd0.7Sr0.3MnO3 is synthesized by high-energy ball milling. Nd0.7Sr0.3MnO3 single phase with perovskite structure is formed completely after milling 4 h and the perovskite phase decreases gradually and changes into amorphous state with increasing ball milling time up to 12 h.
S.S. Chen, C.P. Yang, Z.H. Zhou, D.H. Guo, H. Wang, G.H. Rao   +5 more
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High Energy Planetary Ball Milling of SiC Powders

Key Engineering Materials, 2007
The effects of high-energy ball milling on SiC powders were studied using a planetary apparatus. Conditions to obtain nanostructured SiC powders with an average crystallite size of 4 nm were determined and powders were characterized by XRD, SEM and TEM analyses. This process was applied to prepare fine powders leading to dense SiC ceramics by sintering
Yu Bai Pan, Zheng Ren Huang, Dong Liang Jiang, Léo Mazerolles, D. Michel, J.L. Pastol, Guillaume Wang   +6 more
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High energy ball milling of a Al65Cu20Fe15 quasicrystalline alloy

Journal of Non-Crystalline Solids, 2004
The phase transformations of the quasicrystals and related crystalline phases present in an Al65Cu20Fe15 alloy were studied by high energy ball milling. The milling was carried out in an attritor mill at speeds of 200 and 400 rpm for 5, 10, 20 and 40 h with a ball to charge ratio of 20:1, using hexane as a process control agent.
N.K. Mukhopadhyay, Vinod Kurup, V.C. Srivastava, P.B. Joshi, R.K. Mandal   +4 more
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Nickel Silicides Synthesized by High Energy Ball Milling

Key Engineering Materials, 2007
The high energy ball milling of Ni-50 atom % Si elemental powder mixtures was carried out using a planetary mill. X-ray diffraction (XRD) was used to identify the phase evolutions during the high energy ball milling period. The microstructure morphology of the powders milled different time was determined by field emission scanning electron microscope ...
Gen Shun Ji, Qin Ma, Tie Ming Guo, Qi Zhou, Jian Gang Jia, Xin Guo, Xue Ding Chen   +6 more
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Nanocrystalline metals prepared by high-energy ball milling

Metallurgical Transactions A, 1990
This is a first systematic report on the synthesis of completely nanocrystalline metals by high-energy deformation processes. Pure metals with body-centered cubic (bcc) and hexagonal close-packed (hcp) structures are subjected to ball milling, resulting in a decrease of the average grain size to ≈9 nm for metals with bcc and to ≈13 nm for metals with ...
H. J. Fecht, E. Hellstern, Z. Fu, W. L. Johnson   +3 more
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Synthesis of magnetite nanoparticles by high energy ball milling

Applied Surface Science, 2013
Abstract We report on the preparation of magnetite nanoparticles, with size ranging from 12 nm to 20 nm, by high energy ball milling. The synthesis is made using stoichiometric amounts of distilled water and metallic iron powder. The milled powder samples were analyzed by Mossbauer spectroscopy (MS), X-ray diffraction (XRD) and vibrating sample ...
Carriço, Artur da Silva, Carvalho, J. F., Medeiros, S. N., Morales, M. A., Dantas, Ana L.   +4 more
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Synthesis of Cordierite Using High Energy Ball Milling

Materials Science Forum, 2005
Cordierite was synthesized by the reaction sintering using a high-energy ball milling process. After a high-energy ball milling for 32hr, the reaction temperature of cordierite was reduced to 1350oC from the conventional synthesis temperature of 1460oC.
Sung Jin Kim, Hee Gon Bang, Sang Yeup Park   +2 more
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High Energy Ball-milling of Hydrogen Titanate Nanotubes

2009
Properties of TiO2 nanostructures have been intensively studied because of the large potential of their possible applications in solar cells, electronics, sensing, photocatalysis as a catalyst support and as new material for mesoporous ion exchange. Titanate nanotubes are particularly interesting because of their large aspect ratio, and large specific ...
Gajović, Andreja, Iveković, Damir, Plodinec, Milivoj, Friščić, Ivica   +3 more
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