Results 241 to 250 of about 19,472 (303)

Transformations in oxides induced by high-energy ball-milling

Dalton Transactions, 2012
This paper, by no means exhaustive, focuses on high-energy ball-milling of oxides, on their mechanically induced changes and on the consequences of such changes on their physical and chemical properties. High-energy ball-milling offers a fortunate combination of technical simplicity and of complexity both of physical mechanisms which act during milling
Šepelák, Vladimir, Bégin-Colin, Sylvie, Le Caër, Gérard   +2 more
openaire   +5 more sources

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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The effect of high energy ball milling on the crystal structure of GDNi5 [PDF]

Physica B: Condensed Matter, 2001
X-ray powder diffraction was used to determine the effect, of dry, in air performed high energy ball milling, on the intermetallic compound GdNi5. It was found that the crystal structure of GdNi5 is not stable, and at the early stage of milling (up to after 10 h of milling) it decomposes into the constituent metals gadolinium and nickel, whereby ...
Stubičar, Mirko, Blažina, Želimir, Tonejc, Antun, Stubičar, Nada, Krumes, Dragomir   +4 more
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Nanocrystals by high energy ball milling

Nanostructured Materials, 1992
It has been shown that nanometer-size grains can be induced in even brittl e intermetallic compounds by high energy ball milling. The large grain boundary area provided by these nanocrystallites can help provide, along with the disordering energy, the driving free energy for the crystalline-to-amorphous transformation.
C.C. Koch, Y.S. Cho
openaire   +1 more source

High Energy Ball Mill Processing

Materials Science Forum, 2003
The technique named mechanical alloying has been historically used for designating many different process routes, in spite of involving various kinds of materials and purposes. The aim of this work is to make a review of this technique, with special emphasis on the differences between those routes.
Edval G. de Araújo, Ricardo Mendes Leal Neto, M.F. Pillis, Francisco Ambrozio Filho   +3 more
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High-Energy Ball Milling of NiAl(Fe) System

Hyperfine Interactions, 2002
High-energy ball milling was used to promote the solubilization of iron into NiAl powder for an iron concentration range of 10–30 wt.%. The microstructural evolution induced by the intense mechanical deformations, under different milling conditions, was followed by X-ray diffraction and Mossbauer spectroscopy.
PRINCIPI, GIOVANNI, SPATARU, TUDOR, MADDALENA, AMEDEO, S. GIALANELLA   +3 more
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High-Energy Ball-Milling of Alloys and Compounds

Hyperfine Interactions, 2002
After outlining some characteristics of high-energy ball-milling, we discuss selected examples of phase transformation and of alloy synthesis which focus on deviations from archetypal behaviours and throw light on the milling mechanisms. Some contributions of Mossbauer spectrometry to the characterization of ground materials are described.
G. Le Caër, P. Delcroix, S. Bégin-Colin, T. Ziller   +3 more
openaire   +1 more source

Hydrogenation of TiFe by high-energy ball milling

Journal of Alloys and Compounds, 2000
The hydrogenation properties of TiFe, TiFe2 and pure Ti during high-energy ball milling in hydrogen atmosphere were studied. By ball milling, TiFe could absorb hydrogen without activation treatment. For Ti powder, a single phase TiH1.924 was formed.
C.-H Chiang, Z.-H Chin, T.-P Perng
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High energy ball milling of Co89B11 powders

Nanostructured Materials, 1999
Abstract Mechanical alloying was performed on elemental cobalt and boron powders with atomic ratio Co 89 B 11 . X-ray diffraction analysis (XRD) and differential scanning calorimetry were used to characterize the structure of the milled samples before and after the heating. The high-energy ball milling was found to influence the resulting phases. The
M. Jachimowicz, V.I. Fadeeva, H. Matyja
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