Microstructural aspects and positron annihilation study on solid state synthesis of amorphous and nanocrystalline Al60−xTi40Six alloys prepared by mechanical alloying

Nandi, Pratyush Kiran; Chattopadhyay, Partha; Nambissan, P.M.G.; Banhart, Florian; Fecht, Hans‐Jörg; Manna, I.

doi:10.1016/j.jnoncrysol.2005.06.043

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…However, a low intensity and broad peak of Al 3 Ti is found superimposed on the broad hump representing the amorphous matrix. This phase aggregate corroborates the results of a previous study dealing with mechanical alloying of the same powder blend [26,27]. Fig.…”

Section: Resultssupporting

confidence: 91%

Evaluation of mechanical properties of partially amorphous and nanocrystalline Al50Ti40Si10 composites prepared by mechanical alloying and hot isostatic pressing

Roy

Mitra

Ojo

et al. 2012

Materials Science and Engineering: A

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Section: Resultssupporting

confidence: 91%

Evaluation of mechanical properties of partially amorphous and nanocrystalline Al50Ti40Si10 composites prepared by mechanical alloying and hot isostatic pressing

Roy

Mitra

Ojo

et al. 2012

Materials Science and Engineering: A

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“…BNBT can be produced by various chemical methods [16][17][18] which have disadvantage like expensive precursors and complexity of processing parameters [19,20]. Mechanical alloying (MA) is one of the solid state routes employed extensively to produce structures far from their equilibrium states such as supersaturated solid state solutions, amorphous phases, and nanocrystalline materials [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Structural, microstructural and thermal properties of lead-free bismuth–sodium–barium–titanate piezoceramics synthesized by mechanical alloying

Amini

Ghazanfari

Alizadeh

et al. 2013

Materials Research Bulletin

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“…These two aspects have been extensively studied and explained by positron annihilation spectroscopy and nuclear magnetic resonance in case of solid-state amorphisation of Al-Ti-Si system. [120][121][122] To conclude, although the MM and MA amorphisation are not understood completely yet, it is clear that the high density of lattice defects such as vacancies, interstitials, dislocations, grain boundaries and specific surface area play an important role for the thermodynamics and the kinetics of the amorphisation reaction. They raise the free energy of crystalline system and destabilise it with respect to the amorphous state.…”

Section: Amorphisation By MM (Defects-induced Amorphisation)mentioning

confidence: 99%

Application of mechanical alloying/milling for synthesis of nanocrystalline and amorphous materials

Enayati¹,

Mohamed²

2014

International Materials Reviews

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Mechanical alloying (MA) and mechanical milling (MM) techniques have been widely utilised over the past two decades for synthesis of various alloys and composites with equilibrium or metastable structure at room temperature. One of the most interesting features of MA/MM is the ability to produce nanocrystalline and amorphous materials. Several mechanisms for formation of nanocrystalline and amorphous structures have been introduced based on experimental findings and similarity of MA/MM to other solid-state processing routes. In this paper, the recent experimental observations reported on development of nanocrystalline and amorphous structures using ball mill technique are selectively examined and critically reviewed to provide further insight into the key issues related to this solid-state technique. The review includes four major parts. It begins with a brief introduction to MA/MM and the principles of ball milling process for synthesis of materials. The second part is devoted to the formation of nanocrystalline structure by ball milling process. The earlier studies are summarised with special emphasis on the minimum grain size obtainable by ball milling, besides the recent progresses on the prediction of minimum grain size based on dislocation models are analysed and discussed in detail. The third part deals with the amorphisation reaction induced by ball milling. This section includes the thermodynamic and kinetic aspects, the criteria developed for amorphisation reaction and microstructural evolution of powders during MA leading to the amorphisation reaction. The last part is devoted to the bulk amorphous/nanocrystalline alloys produced from precursor powder.

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Microstructural aspects and positron annihilation study on solid state synthesis of amorphous and nanocrystalline Al60−xTi40Six alloys prepared by mechanical alloying

Cited by 9 publications

References 22 publications

Evaluation of mechanical properties of partially amorphous and nanocrystalline Al50Ti40Si10 composites prepared by mechanical alloying and hot isostatic pressing

Evaluation of mechanical properties of partially amorphous and nanocrystalline Al50Ti40Si10 composites prepared by mechanical alloying and hot isostatic pressing

Structural, microstructural and thermal properties of lead-free bismuth–sodium–barium–titanate piezoceramics synthesized by mechanical alloying

Application of mechanical alloying/milling for synthesis of nanocrystalline and amorphous materials

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