Synthesis of nickel aluminides under high-pressure shock loading

Horie, Y.; Graham, R. A.; Simonsen, I.

doi:10.1016/0167-577x(85)90075-8

Cited by 65 publications

(14 citation statements)

References 9 publications

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“…The results of Horie et al 16 and Simonsen et al 17 on Ni-Al powders suggest that reactions are initiated in very small hot spots, which then grow or quench depending on different factors. They have observed in their recovered samples sparse and localized reaction spots embedded in mostly unreacted zones, the bulk temperature (approximately 320 C) of which remained below the alloying temperature.…”

Section: A Sample Recoverymentioning

confidence: 94%

In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures

Jetté

Higgins

Goroshin

et al. 2011

Journal of Applied Physics

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Anisotropic shock sensitivity for β-octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine energetic material under compressive-shear loading from ReaxFF-lg reactive dynamics simulations J. Appl. Phys. 111, 124904 (2012) Band-filling dependence of thermoelectric properties in B20-type CoGe Appl. Phys. Lett. 100, 093902 (2012) Scaling of light emission from detonating bare Composition B, 2,4,6-trinitrotoluene [C7H5(NO2)3], and PE4 plastic explosive charges J. Appl. Phys. 110, 084905 (2011) Mechano-chemical pathways to H2O and CO2 splitting Appl. Phys. Lett. 99, 154105 (2011) Dissociation of methane under high pressure

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Section: A Sample Recoverymentioning

confidence: 94%

In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures

Jetté

Higgins

Goroshin

et al. 2011

Journal of Applied Physics

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“…This initial discovery was followed by activity in Japan [2,3] and the USSR [4][5][6][7][8]. In the U.S., the pioneering work of Graham and co-workers [9][10][11] was followed by investigations by Vreeland and co-workers [12,13], Horie et al [14,15], Boslough [16], Thadhani and co-workers [17,18], and Yu et al [19,20].…”

Section: Introductionmentioning

confidence: 99%

Shock synthesis of silicides—I. experimentation and microstructural evolution

Vecchio

Meyers

1994

Acta Metallurgica et Materialia

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Abstract--Niobium and molybdenum silicides were synthesized by the passage of high-amplitude shock waves through elemental powder mixtures. These shock waves were generated by planar parallel impact of explosively-accelerated flyer plates on momentum-trapped capsules containing the powders. Recovery of the specimens revealed unreacted, partially-reacted, and fully-reacted regions, in accord with shock energy levels experienced by the powder. Electron microscopy was employed to characterize the partiallyand fully-reacted regions for the Mo-Si and Nb-Si systems, and revealed only equilibrium phases. Selected-area and convergent beam electron diffraction combined with X-ray microanalysis verified the crystal structure and compositions of the reacted products. Diffusion couples between Nb and Si were fabricated for the purpose of measuring static diffusion rates and determining the phases produced under non-shock condition. Comparison of these non-shock diffusion results with the shock synthesis results indicates that a new mechanism is responsible for the production of the NbSi2 and MoSi2 phases under shock compression. At the local level the reaction can be rationalized, for example, in the Nb-Si system under shock compression, through the production of a liquid-phase reaction product (NbSi2) at the Nb-particle/Si-liquid interface, the formation of spherical nodules (~2/zm diameter) of this product through interfacial tension, and their subsequent solidification.

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“…This work also clearly illustrates the possibility of forming multiple phases, and the resulting complexity introduced in the study of reactions occurring at various time-scales in heterogeneous mixtures. formation coincide with the greatest shock-generated temperatures, as shown by the calculated contours (from Horie et al 89 ). (b) For comparison, the region of highest pressure produced in Momma Bear-type recovery capsules lies along the sample axis, as shown from 2D numerical simulation (adapted from Davison et al 91 ).…”

Section: Shock-recovery Experiments and Analysesmentioning

confidence: 99%

“…In 1985, Horie and coworkers 89 were the first to report the synthesis of nickel-aluminum intermetallics following shock-compression, using the well-calibrated Sandia…”

Section: Shock-recovery Experiments and Analysesmentioning

confidence: 99%

Shock compression of reactive powder mixtures

Eakins

Thadhani

2009

International Materials Reviews

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The shock-compression of reactive powder mixtures can yield varied chemical behaviour with occurrence of mechanochemical reactions in the time-scale of the high-pressure state, or thermochemical reactions in the time-scale of temperature equilibration, or simply the creation of densepacked highly reactive state of material. The principal challenge has been to understand the processes that distinguish between mechanochemical (shock-induced) and thermochemical (shock-assisted) reactions, which has broad implications for the synthesis of novel metastable or non-equilibrium materials, or the design of highly configurable next-generation energetic materials. In this paper, the process of shock-compression in reactive powder mixtures and the associated role of various intrinsic and extrinsic characteristics of reactants in the triggering of ultra-fast "shock-induced" chemical reactions are discussed. Experimental techniques employing time-resolved diagnostics, and results, that identify the occurrence of shock-induced reactions are reviewed. Conceptual and numerical models used to describe the heterogeneous nature of such reactions through mesoscopic details of shock-compression are presented. Finally, a discussion of the application of recent results for the design of reactive material systems with controlled reaction initiation and energy release characteristics is provided.

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Synthesis of nickel aluminides under high-pressure shock loading

Cited by 65 publications

References 9 publications

In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures

In-situ measurements of the onset of bulk exothermicity in shock initiation of reactive powder mixtures

Shock synthesis of silicides—I. experimentation and microstructural evolution

Shock compression of reactive powder mixtures

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