Dynamics of phase transformation during thermal explosion in the Al–Ni system: Influence of mechanical activation

Mukasyan, Alexander S.; White, Jeremiah D. E.; Kovalev, D. Yu.; Кочетов, Н. А.; Ponomarev, V. I.; Son, Steven F.

doi:10.1016/j.physb.2009.10.001

Cited by 93 publications

(41 citation statements)

References 17 publications

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“…No metal oxide phases were detected. These results are consistent with a recently published study that also noted the presence of NiAl in mechanically initiated thermal explosion reactions between Al and Ni at significantly slower heating rates (i.e., 100 /min) [11]. Our XRD results coupled with the literature [11] suggest that oxygen or nitrogen from the ambient surroundings does not play a significant role in the intermetallic reactions.…”

Section: Characterization Of Reaction Productssupporting

confidence: 92%

Impact sensitivity of intermetallic nanocomposites: A study on compositional and bulk density

Hunt¹,

Pantoya²

2010

Intermetallics

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Section: Characterization Of Reaction Productssupporting

confidence: 92%

Impact sensitivity of intermetallic nanocomposites: A study on compositional and bulk density

Hunt¹,

Pantoya²

2010

Intermetallics

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“…Structural defects and amorphization in titanium yield to accelerating of diffusive processes and overcoming of thermal barrier for chemical interacting between titanium and boron. Similar results were obtained for mechanical activation for another systems [2,4]. So it is clear that during mechanical activation the amorphization and defects accumulation in compounds structure proceeds markedly faster.…”

Section: Resultssupporting

confidence: 82%

“…Mechanical activation (MA) and its influence on various materials is a popular field for investigation in present time [1][2][3][4]. The reason of that is the preliminary MA allows to realize combustion for low-exothermic systems.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Activation of Ti-2B System: XRD Investigation of Structural Features

Кочетов¹,

Ковалев

2016

Eur Chem Tech J

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XRD investigation of Ti-2B system was carried out with the purpose of determining of structural changes in this system during mechanical activation. The size of coherentscattering region (CSR size) and kind II stresses (microstresses) were calculated by diffraction peaks profile analysis. It was determined that initiation of the synthesis reaction directly in mill is taking place at achievement the value of microstresses for titanium approximately equal to its yield point. Spontaneous reaction in a mill indicates that mechanical activation gives essential structural changes in Ti-2B system. So mechanical activation has essential influence on structural condition of Ti-2B system. Titanium diboride synthesized by high-temperature combustion and by mechanosynthesis have approximately equal crystallites size. These results could clarify the processes of materials structural condition after mechanical activation and have a matter for materials science.

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“…Both MD 8,9,10,11,12 and experimental investigations6 ,13,14 revealed melting of the crystalline solids during the reaction of Ni/Al nanolaminates and Ni/Al nano-particleswhile evidence for solid-state reactions was observed in mechanically activated Ni/Al. 13 The process of melting absorbs a fraction of the energy generated during the chemical reactions (due to the heat of fusion) and consequentlyleads to a local drop in temperature degrading performance. 9,10,12 In this Communication we explore the viability ofamorphous materials for intermolecular reactive composites(aIRCs) which, with melting a 2 nd order phase transition with no heat of fusion,we hypothesize will outperform their crystalline counterparts.…”

Section: Introductionmentioning

confidence: 99%

Amorphous Ni/Al nanoscale laminates as high-energy intermolecular reactive composites

et al. 2012

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We use molecular dynamics simulations to explore the potential use of amorphous metals in intermolecular reactive composites. Our simulations show that amorphous Ni/Al nanolaminates lead to an increase in temperature ofup to 260 K over their crystalline counterparts, this increase corresponds to over 20% of the heat of fusion and can be explained in terms of the amorphization energy. The reactions are diffusion controlled and crystallization is observed in laminates with relatively long periods where high temperatures are experienced for sufficiently long times prior to intermixing; the effect of this process on the energetics and time involved in the reaction are characterized.

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Dynamics of phase transformation during thermal explosion in the Al–Ni system: Influence of mechanical activation

Cited by 93 publications

References 17 publications

Impact sensitivity of intermetallic nanocomposites: A study on compositional and bulk density

Impact sensitivity of intermetallic nanocomposites: A study on compositional and bulk density

Mechanical Activation of Ti-2B System: XRD Investigation of Structural Features

Amorphous Ni/Al nanoscale laminates as high-energy intermolecular reactive composites

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