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nanocrystalline metals prepared by high energy ball milling

  • Nanocrystalline metals prepared by low energy ball milling

    The influence of low energy ball milling on the crystallite size lattice strain and storage of deformation energies of elemental metal powders is studied. The formation of nanosized grains (5-25 nm) and enhancement of lattice strain up to 0.4 is found. Excess enthalpies of up to

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  • Nanocrystalline Oxide Ceramics Prepared by High-Energy

    Nanocrystalline (n) LiNbO3 was prepared by high-energy ball milling from the polycrystalline (p) material. Grain sizes were determined by XRD measurements and TEM images thermal stability ranges

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  • PRODUCTION OF NANOCRYSTALLINE POWDER OF FE-SI

    - This is work we have prepared nanocrystalline Fe-3 Si alloys by high-energy ball milling.The structure of the obtained nanocrystalline Fe-Si alloy is the same as that of bcc-Fe.The obtained Fe-3 Si alloy mainly consist of particle with a grain size of from a few nanometers to several

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  • Hydrogen Storage Properties of Nanocrystalline Mg 2Ni

    Under the ball-milling conditions (high-energy mill and high ball-to-powder mass ratio) in the present work Mg 2Ni alloy powder was formed directly. The ball-milling parameters were as follows The ratio of rod and metallic powder was 20 to 1 rotational speed of ball-milling per minute was 0.2 s-1 and processing control reagent is stearic acid.

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  • Nanocrystalline metals prepared by low energy ball milling

    The influence of low energy ball milling on the crystallite size lattice strain and storage of deformation energies of elemental metal powders is studied. The formation of nanosized grains (5–25 nm) and enhancement of lattice strain up to 0.4 is found. Excess enthalpies of up to

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  • Nanocrystalline metals prepared by low energy ball milling

    The influence of low energy ball milling on the crystallite size lattice strain and storage of deformation energies of elemental metal powders is studied. The formation of nanosized grains (5–25 nm) and enhancement of lattice strain up to 0.4 is found. Excess enthalpies of up to

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  • Structure and magnetic properties of nanocrystalline

    Feb 02 2019 · In this current study nanocrystalline Dy powders were prepared by melt-spinning and subsequent high-energy ball-milling. The effect of ball-milling time on the structure and magnetic properties of the powders was studied.

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  • Structural Investigations of Nanocrystalline Cu-Cr-Mo

    Cu-Cr-Mo alloy could be a suitable candidate material for collector electrodes in high-power microwave tube devices. An attempt has been made to synthesize ternary Cu-Cr-Mo alloys by mechanical alloying of elemental Cu Cr and Mo powders to extend the solid solubility of Cr and Mo in Cu using a commercial planetary ball mill. For the first ternary alloy a mixture of 80 wt. Cu 10 wt. Cr

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  • (PDF) Development and characterization of nanocrystalline

    Development and characterization of nanocrystalline cobalt powder prepared via high energy ball milling process October 2018 IOP Conference Series Materials Science and Engineering 430(1) 012029

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  • The structure of nanocrystalline NiAl powders prepared by

    Dec 02 1995 · Recently it has been reported that nanocrystalline metals and alloys can be prepared by mechanical working of elemental powders or mechanical alloy- ing of powder mixtures in a high-energy ball-mill 2-5 . These claims are mostly based on the analysis of the broadening of X-ray diffraction peak profiles.

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  • Nanocrystalline metals prepared by low energy ball milling

    The influence of low energy ball milling on the crystallite size lattice strain and storage of deformation energies of elemental metal powders is studied. The formation of nanosized grains (5–25 nm) and enhancement of lattice strain up to 0.4 is found. Excess enthalpies of up to

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  • Synthesis and Piezoelectric Properties of Nanocrystalline

    Synthesis and Piezoelectric Properties of Nanocrystalline PZT-Based Ceramics Prepared by High Energy Ball Milling Process January 2004 Journal of Materials Science 39(16)

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  • Hydrogenation of Nanocrystalline Mg2Ni Alloy Prepared by

    Nanocrystalline Mg2Ni powders produced by high energy ball milling (HEBM) were subjected to further severe plastic deformation by cold rolling (CR) or equal-channel angular pressing (ECAP). The microstructure of the alloys have been analysed by the Convolutional whole profile fitting method of the X-ray line profiles. The hydrogenation behavior has been studied by absorption kinetic measurements.

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  • Nanocrystalline ZnO Powder Prepared by High Energy Ball Mill

    Nanocrystalline Ni–Zn-ferrite is synthesized at room temperature by high-energy ball milling with the target composition 0.5 ZnO 0.5 NiO and 1.0 α-Fe2O3 ((0.5 0.5) 1 mole fraction).

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  • Investigation of typical properties of nanocrystalline

    Aug 14 2013 · High-energy milling method has usually been used to fabricate powder materials with a few tens of nanometers in size. The material milling is based on the impact of the hard steel balls which rotate in a closed chamber with a very high speed.

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  • Grain boundaries of nanocrystalline materialstheir

    as atom movements from high energy to lower energy sites in the grain boundaries of nanocrystalline materials prepared by high energy ball milling. 2. Experimental We prepared nanocrystalline alloys by mechanical attrition with a SPEX 8000 laboratory mixer/mill 16 19 20 28 45 . Elemental powders were mixed in appropriate

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  • Dry ball milling and wet ball milling for Rare Metals

    Jul 04 2018 · Yttria-reinforced copper matrix composites were prepared by dry ball milling (DBM) and wet ball milling (WBM) respectively followed by spark plasma sintering (SPS). It is to determine which milling process is better for fabricating Cu–Y2O3 composites. It is found that Cu–Y2O3 composites synthesized by DBM exhibit better densification mechanical and electrical properties than those by

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  • Grain boundaries of nanocrystalline materialstheir

    The internal structure of grain boundaries in nanocrystalline materials prepared by high- energy ball milling is found to be unstable against internal relaxations at low temperatures. The Möss spectra of the nanocrystalline samples showed changes in the hyperfine fields attributable to movements of grain boundary atoms.

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  • Hydrogen Storage Properties of Nanocrystalline Mg 2Ni

    In the present work nanocrystalline Mg 2Ni alloy powders with grain size of about 50 nm were prepared by high-energy ball-milling and its phase crystal structure and hydrogen storage properties were investigated by X-ray diffraction analysis transmission electron microscopy and pressure-composition isotherms respectively.

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  • Nanocrystalline Diamond Particles Prepared by High-Energy

    In this present work nanodiamond (ND) particles were successfully prepared from commercial micron diamond powder at room temperature by high energy ball milling process using an oscillatory mill

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  • Nanocrystalline Oxide Ceramics Prepared by High-Energy

    Nanocrystalline (n) LiNbO3 was prepared by high-energy ball milling from the polycrystalline (p) material. Grain sizes were determined by XRD measurements and TEM images thermal stability ranges

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  • PRODUCTION OF NANOCRYSTALLINE POWDER OF FE-SI

    - This is work we have prepared nanocrystalline Fe-3 Si alloys by high-energy ball milling.The structure of the obtained nanocrystalline Fe-Si alloy is the same as that of bcc-Fe.The obtained Fe-3 Si alloy mainly consist of particle with a grain size of from a few nanometers to several

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  • The preparation and the properties of microcrystalline and

    Abstract The microcrystalline and nanocrystalline CuCr alloys prepared by high-energy ball milling and hot pressing were investigated in this paper. The experimental results show that the nanocrystalline Cu-Cr alloy powders are obtained by high energy ball milling and the milled powders appear flaked or equiaxed morphology with or without liquid medium addition.

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  • Atomic-scale structure of nanocrystalline ZrO 2 prepared

    The atomic-scale structure of nanocrystalline ZrO sub 2 obtained by ball milling has been studied using high-energy x-ray diffraction and the atomic pair distribution function technique. The studies show that upon relatively short milling times the parent crystalline material monoclinic ZrO sub 2 evolves into a nanocrystalline phase that is locally similar to monoclinic zirconia but

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  • Structure and magnetic properties of nanocrystalline

    Feb 02 2019 · In this current study nanocrystalline Dy powders were prepared by melt-spinning and subsequent high-energy ball-milling. The effect of ball-milling time on the structure and magnetic properties of the powders was studied. The crystal structure and microstructure of the melt-spun ribbons and ball-milled powders were observed by X-ray diffraction (XRD) scanning electron microscopy

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  • Nanocrystalline metals prepared by low energy ball milling

    The influence of low energy ball milling on the crystallite size lattice strain and storage of deformation energies of elemental metal powders is studied. The formation of nanosized grains (5-25 nm) and enhancement of lattice strain up to 0.4 is found. Excess enthalpies of up to

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  • Grain boundaries of nanocrystalline materialstheir

    as atom movements from high energy to lower energy sites in the grain boundaries of nanocrystalline materials prepared by high energy ball milling. 2. Experimental We prepared nanocrystalline alloys by mechanical attrition with a SPEX 8000 laboratory mixer/mill 16 19 20 28 45 . Elemental powders were mixed in appropriate

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  • High energy ball milling process for nanomaterial synthesis

    For all nanocrystalline materials prepared by high-energy ball milling synthesis route surface and interface contamination is a major concern. In particular mechanical attributed contamination by the milling tools (Fe or WC) as well as ambient gas (trace impurities such as O 2 N 2 in rare gases) can be problems for high-energy ball milling.

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  • Porous Nanocrystalline Alloys Prepared by High Energy Ball

    Hydrogen Storage Properties of Nanocrystalline Mg 2 Ni x Cu 1-x Synthesized by Mechanical Alloying p.1049 Porous Nanocrystalline Alloys Prepared by High Energy Ball Milling

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  • Reversible grain size changes in ball-milled

    Magnetic properties of metastable fcc Fe-Cu alloys prepared by high energy ball milling. Journal of Magnetism and Magnetic Materials Vol. 124 Issue. 1-2 p. Journal of Magnetism and Magnetic Materials Vol. 124 Issue. 1-2 p.

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  • Microstructure and magnetic properties of dilute

    The microstructure and magnetic properties of nanocrystalline Fe-Si soft magnetic material fabricated by high energy vibratory milling are investigated. Fe-Si wt (x = 1.78 3.51 3.80 5.08 6.06 6.98 8.04) compositions are studied with the 3.5 wt case being used as a model system to investigate effects of processing time. X-ray diffraction (XRD) measurements indicate that the Si is

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  • Nanocrystalline Diamond Particles Prepared by High-Energy

    In this present work nanodiamond (ND) particles were successfully prepared from commercial micron diamond powder at room temperature by high energy ball milling process using an oscillatory mill (SPEX8000). The size reduction and structural evolutions of the milled samples were investigated as a function of the milling time by means of X-ray diffraction and field emission scanning electron

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  • Nanocrystalline ZnO powder prepared by high energy ball mill

    Jul 01 2013 · Nanocrystalline ZnO powder prepared by high energy ball mill Abstract We have obtained zinc oxide (ZnO) in the form of nanocrystallites with crystallite sizes from 46 nm to 3 nm by milling 1.4 micron ZnO powders in the high energy ball mill (HEBM) for the different times 1 5

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  • High-Energy Ball Milling Parameters in Production of

    Aug 24 2017 · Rana JK Sivaprahasam D Seetharama Raju K Subramanya Sarma V (2009) Microstructure and mechanical properties of nanocrystalline high strength Al-Mg-Si (AA6061) alloy by high energy ball milling and spark plasma sintering. Mater Sci

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  • High-Energy Ball Millingan overview ScienceDirect Topics

    2.1.2 High-energy ball milling High-energy ball milling is a mechanical deformation process that is frequently used for producing nanocrystalline metals or alloys in powder form. This technique belongs to the comminution or attrition approach introduced in Chapter 1.

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  • Nanocrystalline Diamond Particles Prepared by High-Energy

    In this present work nanodiamond (ND) particles were successfully prepared from commercial micron diamond powder at room temperature by high energy ball milling process using an oscillatory mill (SPEX8000). The size reduction and structural evolutions of the milled samples were investigated as a function of the milling time by means of X-ray diffraction and field emission scanning electron

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