amorphization by ball milling a review

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Amorphization by ball milling. A review - ScienceDirect

1/10/1988& 0183;& 32;Physica B 153 1988 93-135 North-Holland, Amsterdam AMORPHIZATION BY BALL MILLING. A REVIEW A.W. WEEBER and H. BAKKER Natuurkundig Laboratoriurn der Universiteit van Amsterdam, Valckenierstraat 65, NL-IOI8 XE Amsterdam, TheCited by: 739

Amorphization by ball milling. A review - ScienceDirect

Physica B: Condensed Matter. Volume 153, Issues 1–3, October 1988, Pages 93-135. Amorphization by ball milling. A review. Author links open overlay panel. A.W.Weeber H.Bakker. doi.org/10.1016/0921-4526 88 90038-5 Get rights and content.Cited by: 739

Amorphization by ball milling. A review - NASA/ADS

1/10/1988& 0183;& 32;Amorphization by ball milling. A review - NASA/ADS. 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.Cited by: 739

PDF AMORPHIZATION OF SEMICONDUCTORS BY BALL …

Recent results have demonstrated that ball - milling may produce a partialamorphisation of a pure crystalline semiconductor such as silicon, contrary to thegeneral belief.

Amorphization of selenium induced by high-energy ball …

1/5/1997& 0183;& 32;Calorimetric evidences indi e that during cryogenic-temperature milling amorphization procedure is faster than that at ambient temperature. Our experimental results suggest that amorphization of the crystalline element selenium is driven by …Cited by: 85

Phys. Rev. B 55, 11010 1997 - Amorphization of selenium …

Abstract. Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments have been performed at the ambient temperature and at a cryogenic temperature of -100 & 176;C, respectively. The final milling products under both conditions were found to be a fully amorphous phase after several Cited by: 85

Ball Milling - an overview ScienceDirect Topics

The amorphization process during ball milling can be seen from the images of transmission electron microscopy TEM in Fig. 2a, which were taken from samples milled for different lengths of time. The TEM images show that the size and number of NiZr crystals decrease with increasing milling time, and a full amorphization is achieved after milling for 165 h.

Ball-milling-induced amorphization in Ni x Zr y …

1/7/1993& 0183;& 32;The specific milling intensity is the momentum transferred by the ball to the unit mass of powder per unit time. Below this threshold, a two-phase structure crystalline amorphous is stabilized; the steady proportion of the amorphous phase increases with the milling intensity and decreases on increasing the milling temperature.Cited by: 389

Amorphization Induced by Ball — Milling in Some Pure …

We report on the crystal to amorphous phase transition induced by ball — milling in pure Si and pure Ge powders. Based on X-ray diffraction patterns, scanning and transmission electron micrographs,Cited by: 2

Influence of the Polymer Glass Transition Temperature and …

On the other hand, the method requires a milling time long enough for the incorporation of the drug into the polymer network to achieve full amorphization, which may be as long as 2 h when using an oscillatory ball mill or even 8 h when using a planetary mill 10, .

PDF Amorphization of Aluminum Base …

We have used a ball milling process to attempt to overcome this problem, by producing an homogeneous dispersion of nanoscale oxide particles within Al-enriched amorphous matrices.

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

& 0183;& 32;The BN destruction and amorphization under ball milling Fig. 2 shows the dependence of specific surface area measured by BET on the dose of mechanical treatment. At the initial stage of mechanical treatment specific surface area increases with increase 2

Amorphization of different cellulose samples by ball …

Cellulose fibers became amorphous when the ball-milling time reached 30 min. These results are consistent with some previous findings 41 . The cellulose particles with different aggregation

PDF COMPETITION BETWEEN AMORPHOUS OR …

In this way the amorphization process by ball-milling can be seen as a continuous increase in the volume fraction of zones with local disorder of the crystallographic structures.

Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling

& 0183;& 32;Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling. Shuai Cao, a. Thomas D. Bennett, dDavid A. Keen, b,c Andrew L. Goodwin, and Anthony K. Cheetham. a. a. Tel: 441223767061; E -mail:akc30 cam.ac.uk. Department of Materials Science and Metallurgy,University of Cambridge,CB2 3QZ, UK.

HRTEM and EELS Studies on the Amorphization of …

We present a new approach, namely ball milling, to synthesize amorphous boron nitride a‐BN . The amorphization kinetics are revealed by X‐ray diffractometry XRD , high‐resolution transmission electron microscopy HRTEM , and electron energy loss

Amorphization by mechanical alloying - ScienceDirect

1/2/1990& 0183;& 32;Major conclusions from this work relevant to amorphization by MM are: 1 large values for the stored enthalpy of cold work can be obtained by high energy ball milling -- much larger than in conventional deformation processes; 2 crystailite re- finement by ball

Amorphization and disordering of the Ni3Al ordered …

The severe plastic deformation produced by milling induced transformations with increasing milling time as follows: ordered fcc 2; disordered fcc 2; nanocrystalline fcc amorphous. The milling time for complete disordering occurred at 5 h for stoichiometric Ni 3 Al milled at ambient temperature compared to 50 h for the first observation of an amorphous structure.

Enhanced Amorphization by Sn Substitution for Si and B …

Enhanced Amorphization by Sn Substitution for Si and B in the Ball-Milled Ti 50 Ni 22 Cu 18 Al 4 Si 4 B 2 Alloy p.488 Electron Structure, Stability and Nanocrystallization of Al - Based Amorphous Alloys

PDF Amorphization behaviour in mechanically alloyed …

Amorphization behaviour of NixTa100–x alloy powders synthesized by mechanical alloying mixtures of pure crystalline Ni and Ta powders with a Spex high energy ball mill was studied.

Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling

& 0183;& 32;Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling. Shuai Cao, a. Thomas D. Bennett, dDavid A. Keen, b,c Andrew L. Goodwin, and Anthony K. Cheetham. a. a. Tel: 441223767061; E -mail:akc30 cam.ac.uk. Department of Materials Science and Metallurgy,University of Cambridge,CB2 3QZ, UK.

Ball‐Milling‐Induced Amorphization of Zeolitic …

We discover that this guest retention is greatly enhanced upon facile amorphisation by ball milling, particularly in the case of ZIF‐mnIm, for which I 2 loss is retarded by as much as 200 C. It is anticipated that this general approach should be applicable to the wide …

The structure and property characteristics of …

Structurally, the amorphous silicon component prepared by ball milling is similar to that obtained by ion implantation or chemical vapor deposition. The amorphous Si formed exhibits a crystallization temperature of about 660 & 176;C at a heating rate of 40 K/min and crystallization activation energy of …

Effect of ball milling on the physicochemical properties of …

The purposes of this study were to clarify the amorphization by ball milling of atorvastatin calcium sesquihydrate AT and to analyse the change in dissolution kinetics. Methods The amorphous AT was prepared from crystal AT by ball milling and analysed in terms of the changes of its physicochemical properties by powder X‐ray diffraction analysis XRD , thermal analysis and infrared spectroscopy IR .

Influence of the Polymer Glass Transition Temperature and …

On the other hand, the method requires a milling time long enough for the incorporation of the drug into the polymer network to achieve full amorphization, which may be as long as 2 h when using an oscillatory ball mill or even 8 h when using a planetary mill 10, .

HRTEM and EELS Studies on the Amorphization of …

We present a new approach, namely ball milling, to synthesize amorphous boron nitride a‐BN . The amorphization kinetics are revealed by X‐ray diffractometry XRD , high‐resolution transmission electron microscopy HRTEM , and electron energy loss

Influence of the Polymer Glass Transition Temperature and Molecular Weight on Drug Amorphization Kinetics Using Ball Milling

& 0183;& 32;2.3. Ball Milling The time to reach full drug amorphization ta was studied using an oscillatory ball mill Mixer mill MM400, Retsch GmbH and Co., Haan, Germany , which was placed in a cold room 5 C . Physical mixtures of drug and polymer 1000 mg were

PDF Amorphization behaviour in mechanically alloyed …

Amorphization behaviour of NixTa100–x alloy powders synthesized by mechanical alloying mixtures of pure crystalline Ni and Ta powders with a Spex high energy ball mill was studied.

Disordering and amorphization of L12-type alloys by …

This is in contrast to the Zr 3 Al compound also L1 2-type for which a short milling time is sufficient for obtaining complete amorphization. Variations in the aptitudes toward amorphization of the three L1 2 -type alloys under ball-milling conditions are attributed in part to the differences in the lattice stability terms of their disordered fcc phases.

Reduced graphene oxide synthesis by high energy ball …

1/7/2015& 0183;& 32;Graphite, under high energy ball milling in an inert atmosphere needs a long time to become amorphous 43 , 44 . In fact, a limited time ball milling can lead to nanocrystalline graphite embedded in an amorphous carbon matrix 45 . For planetary ball milling, shearing component of …

Ball‐Milling‐Induced Amorphization of Zeolitic …

We discover that this guest retention is greatly enhanced upon facile amorphisation by ball milling, particularly in the case of ZIF‐mnIm, for which I 2 loss is retarded by as much as 200 C. It is anticipated that this general approach should be applicable to the wide …

Effect of ball milling on the physicochemical properties of …

The purposes of this study were to clarify the amorphization by ball milling of atorvastatin calcium sesquihydrate AT and to analyse the change in dissolution kinetics. Methods The amorphous AT was prepared from crystal AT by ball milling and analysed in terms of the changes of its physicochemical properties by powder X‐ray diffraction analysis XRD , thermal analysis and infrared spectroscopy IR .

The structure and property characteristics of …

Structurally, the amorphous silicon component prepared by ball milling is similar to that obtained by ion implantation or chemical vapor deposition. The amorphous Si formed exhibits a crystallization temperature of about 660 & 176;C at a heating rate of 40 K/min and crystallization activation energy of …

Amorphization of ZrO 2 CeO 2 Powders Through …

To prepare the powder for the use of the kinetic spray, the amorphization and grain refinement of ZrO2 powder in mechanical ball milling were studied. The results showed that the amorphization and grain refinement were improved because of the formation of solid solution when the CeO2 agent was added.

Impact of Ball-Milling Pretreatment on Pyrolysis …

The results suggested that ball-milling pretreatment led to effective disruption of crystalline cellulose to amorphous cellulose. It is, therefore, concluded that the ball-milled cellulose can easily become a useful source of chemicals and energy than crystalline cellulose.

The development of research and appli ion of …

5 A.W.Weeber and H.B.Bakker: "Amorphization by Ball Milling. A Review", Phisica B,153 1988 93-135. 6 小特集"メカニカルアロイングの 近の研究動向",日本金属学会会報,27 1988 799-828. 7 P.H.Shingu, B.Huang, S.R.Nishitani and S.Nasu: "Nano-Meter

M& 246;ssbauer Studies of Ball Milled Fe1-xS1 x SpringerLink

Weeber, A.W. and Bakker, H. 1988 Amorphization by ball milling. A reviewPhysica B 153, 93–135. CrossRef Google Scholar

Surfactant Assisted Ball Milling: A Simple Top down …

Among all the approaches, high energy ball milling with surfactant has been widely exploited for the synthesis of various nanomaterials, nanograins, nanocomposites from solid state. Self-assembled structures of surfactants provide a valuable tool for the controlled formation of nanostructure.

Solid State Amorphization by Cold‐Rolling - Materials …

Complete intermixing in the solid state can be achieved by e.g. ball milling of powders or cold rolling of foils. Compared to ball milling, cold rolling of layered elemental foils provides mechanical deformation of the elemental multilayer samples at a smaller strain rate and under controlled conditions at ambient temperatures and pressure.

Amorphisation Scientific.Net

Journal of Biomimetics, Biomaterials and Biomedical Engineering

Ball-milling-induced amorphization in …

The specific milling intensity is the momentum transferred by the ball to the unit mass of powder per unit time. Below this threshold, a two-phase structure crystalline amorphous is stabilized; the steady proportion of the amorphous phase increases with the milling intensity and decreases on increasing the milling temperature.

Ball‐Milling‐Induced Amorphization of Zeolitic …

We discover that this guest retention is greatly enhanced upon facile amorphisation by ball milling, particularly in the case of ZIF‐mnIm, for which I 2 loss is retarded by as much as 200 C. It is anticipated that this general approach should be applicable to the wide …

PDF Amorphization of the prototypical zeolitic …

Chemical communi ions. We report the rapid amorphization of the prototypical substituted zeolitic imidazolate framework, ZIF-8, by ball-milling. The resultant amorphous ZIF-8 a m ZIF-8 possesses a continuous random network CRN topology with a higher density and a …

Destruction, Amorphization and Reactivity of Nano-BN …

When nanocrystallites are less than several nanometers in size, mechanical treatment results in BN amorphization; in this case specific surface of the system begins to decrease. Splitting of BN plates in the atmosphere of hydrogen is accompanied by the material hydrogenation and formation of …

Amorphization of ZrO 2 CeO 2 Powders Through …

To prepare the powder for the use of the kinetic spray, the amorphization and grain refinement of ZrO2 powder in mechanical ball milling were studied. The results showed that the amorphization and grain refinement were improved because of the formation of solid solution when the CeO2 agent was added.

Working Volume in High-Energy Ball-Milling Process on …

The results showed that the ball-milling process is effective to reduce particle sizes to several micrometers and further nanometers. Precise control of the final particle size was achieved by the adjustment of working volume, in which the less working volume results in …

Solid‐state amorphization of linaprazan by mechanical …

The results indi e that this drug undergoes a direct crystal‐to‐glass transformation upon milling. Moreover, upon heating, the amorphous material obtained by milling is shown to recrystallize toward two different polymorphs that appear to form a monotropic set. & 169; 2013 Wiley Periodicals, Inc. and the American Pharmacists Association J Pharm Sci 102:2214–2220, 201

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Amorphisation Scientific.Net

Journal of Biomimetics, Biomaterials and Biomedical Engineering

Solid State Amorphization by Cold‐Rolling - Materials …

Complete intermixing in the solid state can be achieved by e.g. ball milling of powders or cold rolling of foils. Compared to ball milling, cold rolling of layered elemental foils provides mechanical deformation of the elemental multilayer samples at a smaller strain rate and under controlled conditions at ambient temperatures and pressure.

The effects of attrition and ball milling on the properties …

4/5/2010& 0183;& 32;For longer milling times up to 100 h J c decreased suggesting a critical ball milling duration to optimize J c. Senkowicz et al 12 showed that deliberate addition of low levels of carbon by milling MgB 2 powder with carbon enhances both J c and μ 0 H c2 , while adding larger amounts leads to a decrease in these properties, consistent with the known effects of carbon doping.

PDF Amorphization of Aluminum Base …

We have used a ball milling process to attempt to overcome this problem, by producing an homogeneous dispersion of nanoscale oxide particles within Al-enriched amorphous matrices.

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

& 0183;& 32;The BN destruction and amorphization under ball milling Fig. 2 shows the dependence of specific surface area measured by BET on the dose of mechanical treatment. At the initial stage of mechanical treatment specific surface area increases with increase 2

Amorphization of different cellulose samples by ball …

Cellulose fibers became amorphous when the ball-milling time reached 30 min. These results are consistent with some previous findings 41 . The cellulose particles with different aggregation

PDF COMPETITION BETWEEN AMORPHOUS OR …

In this way the amorphization process by ball-milling can be seen as a continuous increase in the volume fraction of zones with local disorder of the crystallographic structures.

Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling

& 0183;& 32;Amorphization of the Prototypical Zeolitic Imidazolate Framework ZIF-8 by Ball-milling. Shuai Cao, a. Thomas D. Bennett, dDavid A. Keen, b,c Andrew L. Goodwin, and Anthony K. Cheetham. a. a. Tel: 441223767061; E -mail:akc30 cam.ac.uk. Department of Materials Science and Metallurgy,University of Cambridge,CB2 3QZ, UK.

HRTEM and EELS Studies on the Amorphization of …

We present a new approach, namely ball milling, to synthesize amorphous boron nitride a‐BN . The amorphization kinetics are revealed by X‐ray diffractometry XRD , high‐resolution transmission electron microscopy HRTEM , and electron energy loss

Amorphization by mechanical alloying - ScienceDirect

1/2/1990& 0183;& 32;Major conclusions from this work relevant to amorphization by MM are: 1 large values for the stored enthalpy of cold work can be obtained by high energy ball milling -- much larger than in conventional deformation processes; 2 crystailite re- finement by ball

Amorphization and disordering of the Ni3Al ordered …

The severe plastic deformation produced by milling induced transformations with increasing milling time as follows: ordered fcc 2; disordered fcc 2; nanocrystalline fcc amorphous. The milling time for complete disordering occurred at 5 h for stoichiometric Ni 3 Al milled at ambient temperature compared to 50 h for the first observation of an amorphous structure.

Enhanced Amorphization by Sn Substitution for Si and B …

Enhanced Amorphization by Sn Substitution for Si and B in the Ball-Milled Ti 50 Ni 22 Cu 18 Al 4 Si 4 B 2 Alloy p.488 Electron Structure, Stability and Nanocrystallization of Al - Based Amorphous Alloys

PDF Amorphization behaviour in mechanically alloyed …

Amorphization behaviour of NixTa100–x alloy powders synthesized by mechanical alloying mixtures of pure crystalline Ni and Ta powders with a Spex high energy ball mill was studied.

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