The propagation of a solid-state combustion wave in Ni-Al foils

Anselmi‐Tamburini, Umberto; Munir, Z. A.

doi:10.1063/1.343777

Cited by 126 publications

(39 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermodynamic modification is therefore necessary to improve its usability and reliability. Several reactive Al-Ni systems have been produced by methods like combustion synthesis [8], mixing and pressing of powders [9,10], welding [11,12], forging [13], rolling [14,15], vacuum deposition [11,15], cladding [16], and high energy ball milling [17][18][19]. It is well-known fact that the reactivity of these composites depends strongly on their corresponding microstructures.…”

Section: Introductionmentioning

confidence: 99%

Exothermic Reaction Kinetics in High Energy Density Al-Ni with Nanoscale Multilayers Synthesized by Cryomilling

Han

et al. 2018

Metals

View full text Add to dashboard Cite

Abstract:The Al-Ni system is known as a high energy density materials (HEDM) because of its highly exothermic nature during intermetallic compound (IMC) formation. In this study, elemental Al and Ni powder were milled to explore the effect of cryomilling atmosphere on the microstructure and exothermic behavior. Scanning electron microscope (SEM) observations show continuous structural refinement up to 8 h of cryomilling. No IMC phase was detected in the X-ray diffraction (XRD) spectrum. Differential thermal analyzer (DTA) results show two exothermic peaks for 8 h cryomilled powder as compared to that of powder milled for 1 h. The ignition temperature of prepared powder mixture also decreased due to gradual structural refinement. The activation energy was also calculated and correlated with the DTA and SEM results. The cryomilled Al-Ni powder is composed of fine Al-Ni metastable junctions which improve the reactivity at a lower exothermic reaction temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Exothermic Reaction Kinetics in High Energy Density Al-Ni with Nanoscale Multilayers Synthesized by Cryomilling

Han

et al. 2018

Metals

View full text Add to dashboard Cite

show abstract

“…[14] Munir et al studied the SHS reaction in laminated Ni/Al foils and established a sequence of reactions between these two metals. [15] Zhu et al conducted combustion reaction in a multilayer Ni/Al system in the thermal explosion mode and summarized the evolution of reaction of the Ni/Al combustion synthesis based on precise temperature measurements during combustion and microstructural analysis of the quenched samples. [16] To the authors' knowledge, it has not been reported that both modes of reaction can occur sequentially in a single multilayer sample.…”

Section: Introductionmentioning

confidence: 99%

Combustion Synthesis Reactions in Cold-Rolled Ni/Al and Ti/Al Multilayers

Qiu

Liu

Guo

et al. 2009

Metall Mater Trans A

View full text Add to dashboard Cite

In this article, a cold rolling method was developed to fabricate Ni/Al and Ti/Al multilayer foils, and the combustion synthesis reactions in the cold-rolled foils were investigated. Combustion synthesis reactions were initiated by heating one end of the cold-rolled foil in a flame for several seconds. The Ni/Al foils went through three reaction stages. The first reaction stage was a displacement of reaction zone with Al 3 Ni as the reaction product. During the second stage, the part of the foil in the flame underwent thermal explosion. In the last stage, the heat released by thermal explosion triggered a self-propagating high-temperature synthesis (SHS) reaction across the foil that resulted in the formation of AlNi. In contrast, the Ti/Al foils experienced only two reaction stages. First, a displacement of the reaction zone propagated across the foil with formation of Al 3 Ti at the Ti/Al interface. Then a thermal explosion reaction occurred in the part of foil that was heated in the flame, resulting in many different phases in the reacted foil.

show abstract

“…Alternating nanoscale layers of metals that, upon initiation by an external energy source (heat or spark), react to form intermetallic compounds in an exothermic formation reaction are called reactive multilayer foils (RMLF). Since the intermetallic formation is an exothermic process, heat is generated into the surrounding foil volume causing a chain reaction of new phase formation that propagates along the interfaces up to the ends of the foil ( Figure 11) [38,39]. Since RMLFs produce extremely high heat over a small surface area, they are useful to join dissimilar materials such as a metal and ceramic, exposing only the contact surfaces to destabilizing heat.…”

Section: Current and Future Dtem Applicationsmentioning

confidence: 99%

Practical considerations for high spatial and temporal resolution dynamic transmission electron microscopy

et al. 2007

View full text Add to dashboard Cite

Although recent years have seen significant advances in the spatial resolution possible in the transmission electron microscope (TEM), the temporal resolution of most microscopes is limited to video rate at best. This lack of temporal resolution means that our understanding of dynamic processes in materials is extremely limited. High temporal resolution in the TEM can be achieved, however, by replacing the normal thermionic or field emission source with a photoemission source. In this case the temporal resolution is limited only by the ability to create a short pulse of photoexcited electrons in the source, and this can be as short as a few femtoseconds. The operation of the photo-emission source and the control of the subsequent pulse of electrons (containing as many as 5 x 10 7 electrons) create significant challenges for a standard microscope column that is designed to operate with a single electron in the column at any one time. In this paper, the generation and control of electron pulses in the TEM to obtain a temporal resolution <10-6 s will be described and the effect of the pulse duration and current density on the spatial resolution of the instrument will be examined. The potential of these levels of temporal and spatial resolution for the study of dynamic materials processes will also be discussed.

show abstract

The propagation of a solid-state combustion wave in Ni-Al foils

Abstract: Articles you may be interested inThe role of microstructure refinement on the impact ignition and combustion behavior of mechanically activated Ni/Al reactive composites

Cited by 126 publications

References 9 publications

Exothermic Reaction Kinetics in High Energy Density Al-Ni with Nanoscale Multilayers Synthesized by Cryomilling

Exothermic Reaction Kinetics in High Energy Density Al-Ni with Nanoscale Multilayers Synthesized by Cryomilling

Combustion Synthesis Reactions in Cold-Rolled Ni/Al and Ti/Al Multilayers

Practical considerations for high spatial and temporal resolution dynamic transmission electron microscopy

Contact Info

Product

Resources

About