Oct 19 2013 · Maneshian M.H. Banerjee M.K. Reverse martensitic transformation in alumina15 vol zirconia nanostructured powder synthesized by high energy ball milling. J. Alloy. Compd. 459 531–536 (2008) CrossRef Google Scholar
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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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- 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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This book presents a comprehensive overview of the nanocrystalline Al based alloys as prepared using high-energy ball milling (HEBM). It discusses the influence of HEBM parameters on grain refinement and examines methods for the consolidation of nanocrystalline Al powders further it reviews the
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We prepared various nanocrystalline ceramics by high-energy ball milling. The investigated systems are the oxide ceramics Li 2 O LiNbO 3 LiBO 2 B 2 O 3 TiO 2 as monophase materials and the composite material Li 2 O B 2 O 3. The average grain size was adjusted by variation of the milling time.
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The atomic-scale structure of nanocrystalline ZrO2 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 ZrO2 evolves into a nanocrystalline
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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)
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Hydrogen Storage Properties of Nanocrystalline Mg 2Ni Based Alloys Prepared by Ball-Milling Yifu XIONG Jingwen BA Wuwen QING ÈWenyong JING China Academy of Engineering Physics Mianyang 621900 China Nanocrystalline hydrides are a new class of material in which outstanding hydrogen sorption may be obtained
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We studied the consolidation phenomenon of these powders in order to produce solids with high density the consolidation of nanocrystalline powders being not the same as that of conventional powders. In this phase the effect of milling time and media green density heating rate sintering time and temperature hot pressing etc. was studied.
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The High-Energy Ball Mill Processing have been used in the last 30 years for processing several materials including metallic powder alloys composites intermetallics and ceramics which can result in nanocrystalline or amorphous materials. Its commercial use appears in the middle of
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For such materials it is known that the synthesis conditions may have significant impact on the final properties of the materials prepared. In this contribution we made use of mechanosynthesis carried out via high‐energy ball milling to influence the ionic transport parameters of tetragonal i.e. layer‐structured BaSnF 4.
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The atomic-scale structure of nanocrystalline ZrO2 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 ZrO2 evolves into a nanocrystalline
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We report on the fluorine diffusivity in nanocrystalline BaF 2 and CaF 2 as well as in BaF 2 CaF 2 composites prepared by high-energy ball milling.Mechanical treatment of polycrystalline BaF 2 together with CaF 2 results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm −1 at 450 K. X-ray diffraction and 19 F magic angle spinning
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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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The preparation mechanical properties grain size and thermal property of bulk nanocrystalline Cu (BNC-Cu) were investigated in this paper. BNC-Cu can be produced by in situ consolidation of pure Cu powder with high-energy ball milling at room temperature the average grain sizes of Cu samples decreased with the increasing of ball milling time before 9 h because the grain refining velocity
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Nanocrystalline metals can be produced in several ways among the most common of which are high-pressure compaction of nanometre-sized clusters and high-energy ball-milling 1 2 3 4. The result is
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M. Ramezani T. Neitzert Mechanical milling of aluminum powder using planetary ball milling process Journal of Achievements in Materials and Manufacturing Engineering 55/2 (2012) 790-798. 1. Introduction Mechanical alloying (MA) is a high energy ball milling process by which constituent powders are repeatedly deformed
Get PriceLi Conductivity of Nanocrystalline Li 4 Ti 5 O 12 Prepared by a Sol-Gel Method and High-Energy Ball Milling p.565. Thin Film Dissolution into Semi-Infinite Substrates Surprising Interface Kinetics and Dissolution Modes Li Conductivity of Nanocrystalline Li 4 Ti 5 O 12 Prepared by a Sol-Gel Method and High-Energy Ball Milling.
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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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We have synthesized pure nanocrystalline CeO2 powders of nearly spherical shape using high-energy attritor ball mill. Milling parameters such as the milling speed of 400 rpm ball to powder ratio
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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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Examples of solid state processes include mechanical alloying using a high-energy ball mill and certain types of severe plastic deformation processes. Liquid processing. Nanocrystalline metals can be produced by rapid solidification from the liquid using a process such as melt spinning.
Get PriceWe report on the fluorine diffusivity in nanocrystalline BaF 2 and CaF 2 as well as in BaF 2 CaF 2 composites prepared by high-energy ball milling.Mechanical treatment of polycrystalline BaF 2 together with CaF 2 results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm −1 at 450 K. X-ray diffraction and 19 F magic angle spinning NMR measurements at
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Nov 20 2014 · For such materials it is known that the synthesis conditions may have significant impact on the final properties of the materials prepared. In this contribution we made use of mechanosynthesis carried out via high‐energy ball milling to influence the ionic transport parameters of tetragonal i.e. layer‐structured BaSnF 4.
Get PriceHighly pure Co nanocrystalline powders were prepared by high-energy ball milling under the condition that all operations on the powders were performed in the glovebox filled with highly purified argon gas. A series of annealing experiments at different temperatures were carried out to investigate grain growth in the milled powders.
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Apr 29 2011 · It has been reported that the impact energy of HEBM is typically 1000 times higher than the conventional ball milling energy.43 The major use of the conventional ball milling is to fracture the particles and to reduce the size while in high energy ball milling a longer milling time can be achieved which can help to activate and complete the
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Oct 19 2013 · Maneshian M.H. Banerjee M.K. Reverse martensitic transformation in alumina15 vol zirconia nanostructured powder synthesized by high energy ball milling. J. Alloy. Compd. 459 531–536 (2008) CrossRef Google Scholar
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As regards ball milling of powders and its final result i.e. the particle size the studies of this kind are still performed at the empirical level since models relating the size of particles in prepared nanocrystalline powders to the milling energy are unavailable.
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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 and 8 hours. Crystal structure changes of the ZnO nanocrystallites
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Oct 14 2004 · Read "Synthesis and piezoelectric properties of nanocrystalline PZT-based ceramics prepared by high energy ball milling process Journal of Materials Science" on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at
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Apr 29 2011 · It has been reported that the impact energy of HEBM is typically 1000 times higher than the conventional ball milling energy.43 The major use of the conventional ball milling is to fracture the particles and to reduce the size while in high energy ball milling a longer milling time can be achieved which can help to activate and complete the
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The atomic-scale structure of nanocrystalline ZrO2 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 ZrO2 evolves into a nanocrystalline
Get PricePhonon density of states of nanocrystalline Fe prepared by high-energy ball milling B. Fultz California Institute of Technology mail 138-78 Pasadena California 91125 J. L. Robertson Oak Ridge National Laboratory P.O. Box 2008 Oak Ridge Tennessee 37831 T. A. Stephens and L. J. Nagel
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Nanocrystalline and Amorphous Oxide Powders Prepared by High-Energy Ball-Milling
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Nanocrystalline and Amorphous Oxide Powders Prepared by High-Energy Ball-Milling
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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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