Conditions for combustion synthesis in nanosized Ni/Al films on a substrate

Rabinovich, O. S.; Гринчук, П. С.; Андреев, М. А.; Хина, Б. Б.

doi:10.1016/j.physb.2006.11.032

Cited by 39 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6a, it is apparent that when the powder mass in a humid oxygen atmosphere reaches a critical value, the TG curve no longer exhibits a smooth evolution but shows a very abrupt mass loss and the differential thermal analysis (Supporting Info, Fig.S5) curve exhibits a very sharp exothermic peak; these two features (not observed in N 2 ) are characteristic of a thermal runaway [21,[45][46][47]. When a thermal runaway occurs, the reaction becomes locally unstable; it reaches a high temperature state and accelerates enormously so that it is virtually adiabatic (all the heat released by the reaction contributes to the sample temperature increase) [48][49][50][51][52].…”

Section: Thermal Explosionmentioning

confidence: 98%

Thermal decomposition of yttrium propionate: film and powder

Rasi

Ricart

Obradors

et al. 2018

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

A B S T R A C TThe processes involved in the thermal decomposition of yttrium propionate in oxidizing and inert atmosphere were analyzed with thermoanalytical techniques (thermogravimetry and evolved gas analysis) and with the help of structural characterization (X-ray diffraction, infrared spectroscopy and elemental analysis) of intermediate and final products. Samples in the form of films and powders were analyzed. The decomposition behavior studied as a function of particle size and film thickness was investigated. We conclude that, as a consequence of the gas and heat transport, films decompose differently than powders. Finally, two decomposition mechanisms are proposed that are in agreement with the observed volatiles and intermediate phases.

show abstract

Section: Thermal Explosionmentioning

confidence: 98%

Thermal decomposition of yttrium propionate: film and powder

Rasi

Ricart

Obradors

et al. 2018

Journal of Analytical and Applied Pyrolysis

View full text Add to dashboard Cite

show abstract

“…A similar phenomenon has been observed by Myagkov et al in thin bilayer films of Ni/Al with measured propagation velocity of the reaction front at around 5 mm/s. [18] According to Rabinovich et al, [14] this initial reaction wave can be interpreted as a displacement of the reaction zone only, because the measured velocity was not higher than several centimeters per second. The expected characteristic velocity of an SHS propagation wave in multilayer thin films should be about several meters per second.…”

Section: A Ni-al Multilayer Systemmentioning

confidence: 93%

“…According to Rabinovich et al, [14] the changeover of synthesis regimes in the multilayer foils was determined mainly by the number of binary layers as long as the foil can be considered as isothermal in the transverse direction. From their results, it followed that the SHS can propagate only in foils with a sufficiently large number of binary layers [19,20] or with a high ignition temperature.…”

Section: A Ni-al Multilayer Systemmentioning

confidence: 99%

“…Rabinovich et al analyzed the conditions for combustion synthesis in Ni/Al nanofilms and identified several parameters such as the number of bilayers and heating rates that can affect the reaction modes of the films. [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.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

“…However, in the presence of a coated substrate, the heat is dissipated throughout the substrate material, extinguishing the just-started reaction. Based on a 2D model, Rabinovich et al [10] studied the self-sustaining combustion synthesis in Ni/Al multilayer films deposited on a substrate. Using the thermal model developed for the Ni/Al multilayers' reaction, they evaluated all heat losses, and determined the minimum film thickness required for the reaction to become self-sustained.…”

Section: Introductionmentioning

confidence: 99%

Coating of Tungsten Wire with Ni/Al Multilayers for Self-Healing Applications

Ramos

Maj

Morgiel

et al. 2017

Metals

View full text Add to dashboard Cite

Self-healing materials are able to partially or completely reverse the damage inflicted on them. The possibility of self-healing mechanical and chemical failures that occur during service will improve the lifetime and reliability of structural materials. For this purpose, two main steps must be considered: (i) detection, and (ii) repairing (healing) of cracks. The exothermic character of reactive multilayers has potential for self-healing applications, namely in the healing step. In this context, Ni(V)/Al multilayer thin films were deposited onto tungsten wires by magnetron sputtering from two targets. A detailed microstructural characterization was carried out by scanning and transmission electron microscopy after deposition, as well as after ignition by applying an electrical discharge. The as-deposited films presented an irregular layered structure with local defects not observed for flat substrates, although Ni-and Al-rich nanolayers could be distinguished. The as-reacted films were constituted by Al 3 Ni 2 grains with Al 3 V phase at the grain boundaries. In order to use reactive multilayers for self-healing purposes, the heat released must be maximised by improving the microstructure of the nanolayered films. Nevertheless, after ignition, the Ni(V)/Al multilayer films deposited onto W wire underwent a self-sustained reaction, releasing heat.

show abstract

Conditions for combustion synthesis in nanosized Ni/Al films on a substrate

Cited by 39 publications

References 13 publications

Thermal decomposition of yttrium propionate: film and powder

Thermal decomposition of yttrium propionate: film and powder

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

Coating of Tungsten Wire with Ni/Al Multilayers for Self-Healing Applications

Contact Info

Product

Resources

About