amorphization by ball milling a review

Amorphization by ball milling. A review - ScienceDirect

A new method for the preparation of amorphous alloys is the mechanical alloying process. So far, three amorphization reaction types were observed when this technique is used. Which reaction type occurs depends on the local conditions during the milling, such as impact energy and local temperature just after an impact.

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AMORPHIZATION BY BALL MILLING. A REVIEW 1 ... - Science Direct

AMORPHIZATION BY BALL MILLING. A REVIEW. A.W. WEEBER and H. BAKKER. Natuurkundig Laboratoriurn der Universiteit van Amsterdam, Valckenierstraat 65, NL-IOI8 XE Amsterdam,. The Netherlands". Received 1 March 1988. A new method for the preparation of amorphous alloys is the mechanical alloying process...

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Amorphization reactions during mechanical alloying/milling of ...

Solid-state amorphization reactions resulting from the severe mechanical deformation obtained by high-energy ball milling are reviewed. Two classes of such reactions are discussed: 1. “mechanical alloying” where material transfer occurs between elemental powders or alloys, and 2. “mechanical milling” where an...

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Overview of milling techniques for improving the solubility of poorly ...

This review will provide a background on milling followed by the introduction of common milling techniques employed for the micronization and nanonization of drugs. Salient information contained ...... Despite the efficiency of ball milling for size reduction or amorphization, it is less amendable to scale up. By a flow-through...

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Amorphization of M‐Si (M=Ni, Co, Mo, Mn, and Cr) powders by ball ...

Amorphous alloy powders of the silicide type M‐Si (M=Ni, Co, Mo, Mn, and Cr) are produced from crystalline elemental powders by high‐energy ball milling using revolution‐step‐like‐decreasing (RSD) mode. In the ball milling using the RSD mode, after promoting true chemical alloying in milled powder samples under...

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Methods of amorphization and investigation of the amorphous state

Review. DOI: 102478/acph-2013-0026. Methods of amorphization and investigation of the amorphous state. TOMA@ EINFALT*. ODON PLANIN[EK. KLEMEN HROVAT ... such as milling. Whilst when melt and solution mediated methods are used all crystalli- nity is lost in the intermediate phase (melt, solution), mechanical...

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Amorphization of selenium induced by high-energy ball milling

Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments ... results suggest that amorphization of the crystalline element selenium is driven by defects created by frequent mechanical deformation. .... PHYSICAL REVIEW B. 1 MAY 1997-I. VOLUME...

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Planetary Ball Mill Process in Aspect of Milling Energy - Journal of ...

Since milling condition strongly affects the property of milled powder materials, it should be controlled by changing the milling balls, the milling vial, the geometry of mill, and the rotation speed etc. to obtain an end ... This paper reviews the theories of milling energy in planetary ball mill process based on the collision model.

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Ball-Milling-Induced Amorphization of Zeolitic Imidazolate ...

Apr 10, 2013 ... Abstract. The I2-sorption and -retention properties of several existing zeolitic imidazolate frameworks (ZIF-4, -8, -69) and a novel framework, ZIF-mnIm ([Zn(mnIm)2]; mnIm=4-methyl-5-nitroimidazolate), have been characterised using microanalysis, thermogravimetric analysis and X-ray diffraction.

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Atomically disordered nanocrystalline Co2Si by high-energy ball ...

The initially ordered intermetallic compound Co2Si with orthorhombic structure was mechanically milled in a high-energy ball mill. The structural .... B. S. Murty and S. Ranganathan 1998 International Materials Reviews 43 101. Crossref ... Atomic disorder and amorphization of B2-structure CoZr by ball milling G.F. Zhou and...

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Destruction, Amorphization and Reactivity of Nano-BN Under Ball ...

Aug 26, 2009 ... Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ... "Destruction, Amorphization and Reactivity of Nano-BN Under Ball Milling" (2009). Physics Faculty Publications. ... The BN destruction and amorphization under ball milling. Fig. 2 shows the...

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Effect of Mechanical Milling and Cold Pressing on Co Powder

Nov 2, 2011 ... Journal of Metallurgy is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of metallurgy. ... Apart from the FCC phase, Co-based alloys undergo amorphization via electrodeposition [13, 14] and mechanical alloying (MA) [15–17] and during...

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Mechanical Alloying - 1st Edition - Elsevier

1 Introduction 1.1 BACKGROUND 1.2 HISTORY OF STORY OF MECHANICAL ALLOYING 1.3 MILLING 1.4 MECHANISM OF MECHANICAL ALLOYING 1.5 ... OF AMORPHIZATION BY MECHANICAL ALLOYING PROCESS 8.5 THE GLASS-FORMING RANGE 8.6 AMORPHIZATION VIA MECHANICAL ALLOYING WHEN...

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Mechanochemical synthesis of hydrogen ... - Semantic Scholar

Jul 27, 2012 ... Today, mechanochemical synthesis of metal hydrides using ball milling has grown to become one ... Therefore, this review focus on general aspects by discussion selected details and this section focus ..... In amorphization under mechanical driving forces, two categories of alloys could be defined [105].

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Amorphization of the Prototypical Zeolitic ... - Semantic Scholar

Amorphization of the Prototypical Zeolitic Imidazolate. Framework ZIF-8 by Ball-milling ... alongside a 10 mm stainless steel milling ball at room temperature and sealed properly. This combination was then .... E. G. Bithell, J. C. Tan and A. K. Cheetham, Physical Review Letters, 2010, 104, 115503. Electronic Supplementary...

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Deformation-induced localized solid-state amorphization in ... - Nature

Jul 4, 2012 ... Although amorphous structures have been widely obtained in various multi-component metallic alloys, amorphization in pure metals has seldom been observed and remains a ..... Jang, J. S. C. & Koch, C. C. Amorphization and disordering of the Ni3Al ordered intermetallic by mechanical milling . J. Mater.

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Atomic disorder and amorphization of B2-structure CoZr by ball milling

Jan 1, 1996 ... For a considerable number of intermetallic compounds it has been found that ball milling introduces atomic (chemical) disorder. Disorder due to milling was demonstrated by x-ray diffraction in AlRu, crystallizing in the B2 structure (ordered b.c.c.) by a decrease of the intensity of superlattice reflections...

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Formation of Physically Stable Amorphous Drugs by Milling with ...

Ball milling the drugs alone for 48 h resulted in no amorphization. X‐ray powder diffractometry (XPD), birefringence, and differential scanning calorimetry (DSC) data indicated amorphization of all the four drugs on ball milling with Neusilin. Fourier transform infrared spectroscopy (FTIR) data showed a reduction in the...

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Solid-State Amorphization of Linaprazan by Mechanical Milling and ...

May 19, 2013 ... In this paper, we study the thermodynamic and structural changes of crystalline linaprazan (a proton pump inhibitor) upon high-energy ball milling at room temperature. The investigations have been performed by differential scanning calorimetry and powder X-ray diffraction. The results indicate that this...

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MECHANICAL ALLOYING - A NOVEL METHOD FOR SYNTHESIS ...

of crystalline Ni and Nb powders by Koch et al. [14]. The first examples of amorphization of intermetallic compounds by mechani- cal milling were presented by Ermakov et al. [15] in the Y—Co and Gd—Co systems. The fundamentals of thermodynamics and kinetic factors of amorphization in metallic systems are reviewed by...

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Untitled - Department of Mechanical and Nuclear Engineering

º. #:. ELSEVIER. Journal of Nuclear Materials 244 (1997) 227–250. Amorphization of intermetallic compounds under irradiation – A review. Arthur T. Motta. Department of ... This is a review of the field of irradiation-induced amorphization of intermetallic compounds. .... solid state reaction, ball milling and irradiation, is that in.

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Planetary Ball Mill Process in Aspect of Milling Energy (PDF ...

Jun 11, 2015 ... able planetary ball mills, the Fritsch Pulverisette mills [16],. RETSCH planetary ball mills [17] and AGO-2 mills [18] are. most frequently used. The Pulverisette 7 premium line is. known to generate a centrifugal acceleration of 95 g (g=9.81. m/s. 2. ) [19] and the AGO-2 mill 60 g [2]. The characteristics.

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"Kinetic driving effects of phase transformations in mechanically ...

Mechanical activation is one of the major factors leading to the solid state transitions. This study focuses on the understanding of mechanical activated polymorphic transformation and amorphization induced during milling, as well as on the physical stability of milled powders. The first chapter provides a review of the basic...

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Methods of amorphization and investigation of the amorphous state ...

Oct 22, 2013 ... This review presents the methods of solid- -state amorphization described in literature (supercooling of liquids, milling, lyophilization, spray drying, dehydration of .... P. Thanatuksorn, K. Kawai, K. Kajiwara and T. Suzuki, Effects of ball-milling on the glass transition of wheat flour constituents, J. Sci.

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Phase Transformation in the Ball Milled Fe<sub>31</sub>Co<sub ...

Keywords: Nanomaterials; Mechanical Alloying; X-Ray Diffraction; Fe-Co-Nb-B System; Amorphization Kinetics. ABSTRACT. The mechanical alloying process has been used to prepare nanostructured Fe31Co31Nb8B30 (wt%) alloy from pure elemental powders in a high energy planetary ball-mill Retsch PM400.

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Mechanical alloying in a planetary ball mill: kinematic description - Hal

Jan 1, 1994 ... ABSTRACT : Based on a kinematic modeling of the planetary ball mill, the kinematic equations giving the velocity and the acceleration of a ball in a planetary ball mill apparatus are given. The kinetic energy transferred at the collision event and the shock frequency are also calculated. The confrontation of...

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Thomas D. Bennett - Google Scholar Citations

Amorphization of the prototypical zeolitic imidazolate framework ZIF-8 by ball-milling. S Cao, TD Bennett, DA Keen, AL Goodwin, AK Cheetham. Chemical Communications 48 (63), 7805-7807, 2012. 56, 2012. Thermochemistry of zeolitic imidazolate frameworks of varying porosity. JT Hughes, TD Bennett, AK Cheetham,...

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Influence of Milling Media on Mechanically Exfoliated MoS2 - Marek ...

Wet ball milling was used to exfoliate MoS2. The aim of the study was to examine how the surface energy of all the individual materials affected the formation of the nanosheets. Two types of milling balls were selected: one made of steel and one made of Al2O3. The liquids used were water (H2O), isopropyl alcohol (C3H8O)...

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A Solid State Approach to Synthesis Advanced ... - IntechOpen

Mar 21, 2012 ... Mechanical milling as a solid state synthesis usually performed using ball milling equipments that generally divided to “low energy” and “high energy” category based on the value of induced the mechanical energy to the powder mixture. The ball milling equipments used for mechanical grinding or mixing...

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Influence of the milling parameters on the mechanical work ... - Csic

mechanical energy supplied by the planetary mill during this time, called the ignition time .... for the 15 mm balls. In each milling experiment, the powder charge (Zn and Se powders in a. 1:1 stoichiometric ratio) and the milling balls were placed in a 45 mL tempered steel vial (67 ..... minerals: a review, Powder Technol.

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Untitled - Indian Journal of Pharmaceutical Sciences

This review addresses the issue of amorphization of poorly water soluble drugs in the solid state. Amorphous ... The theories of crystal to amorphous phase transformation are based on the concepts of mechanical and thermodynamic destabilization****. The mechanical ... During ball milling, a combination of impact and.

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Control of Structure and Formation of Amorphous and ... - J-Stage

Control of Structure and Formation of Amorphous and Nonequilibrium Crystalline Metals by Mechanical Milling (Overview) ... stage of MA is highly energetic, leading to amorphization even by heating (thermally assisted solid state amorphization), 3) comminution to nano-crystallites is attributed to .... Physical Review Letters.

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Amorphization and nanocrystallization of silcon ... - Site Index Page

Mar 31, 2016 ... LLNL-JRNL-687429. Amorphization and nanocrystallization of silcon under shock compression. B. Remington, C. Wehrenberg, S. Zhao, E. Hahn,. B. Kad, E. Bringa ... Unlike silicon's quasi-static mechanical response, our understanding of silicon's dynamic behavior is .... The TEM foils were ion milled by 30.

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Dissolution Model of Ball Milled Rice Straw Particles in 1-Ethyl-3 ...

Higher milling temperature leads to amorphization of the RS cellulose accelerating dissolution. Measurement of the particle light intensity ratio was used to estimate the rice straw particles dissolution endpoint. A particle dissolution model indicated that ball milling temperature and [Emim][OAc] heating temperature strongly...

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Title Effects of ball-milling and cryomilling on sulfamerazine ... - Aran

Apr 11, 2014 ... ABSTRACT. The effects of ball-milling and cryomilling on sulfamerazine forms I and II (SMZ FI, FII) were investigated using X-ray powder diffraction, IR and NIR spectroscopy. Cryomilling resulted in the complete amorphization of both polymorphs. Milling at room temperature gave mixtures of amorphous...

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The mechanochemical processing of aerospace metals

milling. Mechanical alloying, refers specifically to the formation of alloys from elemental precursors during processing in a ball mill. Reaction milling uses me- chanical processing to induce chemical reactions. The principle attributes of mechanochemical processing are shown in Table I [1–7]. This review is based on a...

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Mechanical alloying and milling

welding, fracturing, and rewelding of powder particles in a high-energy ball mill. Originally developed to produce ... critically reviewed after discussing the process and process variables involved in MA. The often vexing problem of powder ..... amorphization techniques is described in Section 11. Formation of nanostructured.

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Roles of Processing, Structural Defects and Ionic Conductivity in the ...

May 28, 2015 ... Na3MnCO3PO4 has been synthesized via hydrothermal process under various conditions with and without subsequent high-energy ball milling. Particle ..... Since a larger scale factor in the Rietveld refinement means more crystalline phase, we conclude that there is no evidence of amorphization. Further...

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Marc Descamps - Université Lille 1

M. Descamps, A. Aumelas, S. Desprez, J. F. Willart, The amorphous state of pharmaceuticals obtained or transformed by milling: Sub-Tg features and ... M. Durand, L. E. Briggner, A. Marx, F. Danède, M. Descamps, Solid-state amorphization of linaprazan by mechanical milling and evidence of polymorphism, Journal of...

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Magnetic properties of ball-milled SrFe12O19 particles consolidated ...

Sep 15, 2015 ... Author Contributions M.S. performed the SPS pressing and carried out powder diffraction measurements in collaboration with M.C. The main text of the manuscript was written by M.S. and M.C. The ball milling and hysteresis measurements were carried out by M.T. and P.M. All authors have reviewed the...

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