Mechanical Alloying And Milling

Suryanarayana, C.

doi:10.1201/9780203020647

Cited by 870 publications

(607 citation statements)

References 690 publications

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“…It has very often been suggested that pure hydrostatic pressure causes the transformation towards the more dense phase, while the stabilization of the high-temperature phases is due to the local heating generated by the impact of the balls. Suryanarayana 24 has reviewed the mechanochemical phase transformation of chalcogenides and has also concluded that the high pressures generated during milling should be sufficient to stabilize the high-pressure polymorph of phases at atmospheric pressure. However, the cyclic calcite -aragonitecalcite (calcite = trigonal CaCO 3 , aragonite = orthorombic CaCO 3 ) transformations during milling of calcium carbonate reported in previous papers 127,128,132a do not seem to be compatible with this interpretation.…”

Section: Oxidic Compoundsmentioning

confidence: 99%

“…Excellent reviews on the synthesis of ODS alloys have been previously reported in the literature. 14,23,24,496 It must be pointed out that the milling of a ductile metal leads to a dramatic growth of the particles because of agglomeration by cold welding. Thus, they cannot be mechanically alloyed unless a process control agent (PCA) was previously added to prevent cold welding.…”

Section: Further Studiesmentioning

confidence: 99%

“…584 Such a MASHS process has been successfully used to obtain various nanocrystalline compounds 584b,c such as FeAl, [594][595][596][597][598] MoSi 2 , 599 604,609b The effect of mechanical activation on the combustion synthesis of NbAl 3 has been more recently investigated by Neto and Da Rocha. 610 As milling time is increased, the ignition temperature is decreased to temperatures below the melting point of aluminum, going from 850 to 500 1C.…”

Section: Self-sustaining Reactionsmentioning

confidence: 99%

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Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

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Section: Oxidic Compoundsmentioning

confidence: 99%

Section: Further Studiesmentioning

confidence: 99%

Section: Self-sustaining Reactionsmentioning

confidence: 99%

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Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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“…Then Al 2 O 3 and Cr can be dispersed in between the Cu layers and located inside the Cu powders. In the meantime, the interlamellar spacing decreases, and the un-dissolved brittle particles get uniformly dispersed in the ductile matrix [21,22]. Therefore, it will lead to a further increased in Cu particles and fracturing becomes the main process.…”

Section: Advances In Engineering Research Volume 141mentioning

confidence: 99%

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Shen

Zhu²,

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abastract：In this study, the effect of the milling time on microstructure of Cu-0.5 wt.% Cr-1 wt.% Al 2 O 3 was investigated. The lattice parameter was evaluated by the X-ray diffraction technique. The microstructure was characterized by scanning electron microscopy. Also, size and distribution of Cr and Al 2 O 3 were investigated by using X-rays energy dispersive (EDX) mapping. The result shows that the lattice parameter of the Cu phase increases with increasing milling time. The changing trend of Cu particle sizes as the alloying time increases, the particle sizes first increase and then decrease. When milling 1.5h, the powders coarsen than as-received Cu powder. Then the particle sizes of the samples decreased when the milling time increased to 3h and above. In addition, the size and distribution of Cr and Al 2 O 3 decreased and dispersed much fine with increasing milling time.

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“…Among the mechanical alloying routes, ball milling process is one of the most common methods in which the powder particles are subjected to repeated cold welding, fragmenting and re-welding, causing an atomic scale alloying [16][17][18]. By using the MA process, not only the control of microstructure and chemical composition homogeneity is feasible, but also the formation of non-equilibrium phases such as nanocrystalline/amorphous phases, intermetallic phases, and supersaturated solid solutions is achievable [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Structural and microstructural phase evolution during mechano-synthesis of nanocrystalline/amorphous CuAlMn alloy powders

Amini

Mousavizad

Abdollah-Pour

et al. 2013

Advanced Powder Technology

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a b s t r a c tThe formation mechanism of Cu-11.5Al-4Mn alloys by mechanical alloying (MA) of pure elemental powders was investigated. During milling, the powder sampling was conducted at predetermined intervals from 1 h to 96 h. The quantitative phase analyses were done by X-ray diffraction and the particles size and morphology were studied by scanning electron microscopy. Furthermore, the microstructure investigation and phase identification were done by transmission electron microscopy. Concerning the results, the nanocrystalline Cu solid solution were formed at short milling times and, by milling evolution, the austenite-to-martensite (2H) phase transformation occurred. Moreover, the formation of considerable amount of amorphous phase and its partial transformation to crystalline phases during the milling process were revealed. It was also found that, by milling development, the powder morphology changes from lamellar to semi-spherical and their size initially increases, then reduces and afterward re-increases.

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Mechanical Alloying And Milling

Cited by 870 publications

References 690 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Structural and microstructural phase evolution during mechano-synthesis of nanocrystalline/amorphous CuAlMn alloy powders

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