Controllable synthesis of NiCo2O4/Al core-shell nanowires thermite film with excellent heat release and short ignition time. (5th October 2018)

• Record Type: Journal Article
• Authors: Chen, Yajie; Zhang, Wenchao; Yu, Chunpei; Ni, Debin; Ma, Kefeng; Ye, Jiahai
• Is Part Of: Materials & design. Volume 155(2018)
• Page Start: 396
• Page End: 403
• Publication Date: 2018-10-05
• Subjects: NiCo2O4/Al -- Core-shell nanowires structure -- Nanothermite film -- Heat release -- Magnetron sputtering; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2018.06.025
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: NiCo2 O4 has been selected as an oxidizer to realize the nanothermite film for the first time in this study. The NiCo2 O4 /Al core-shell nanowires (NWs) thermite film has been fabricated using a facile hydrothermal-annealing synthesis method and a controllable magnetron sputtering process. The as-obtained NiCo2 O4 /Al NWs thermite film shows a uniform structure and distribution on the substrate, with a favorable interfacial contact between the bimetallic oxide and the fuel at the nanoscale. It is found that the quantity of Al plays a key role in the total heat release magnitude. The maximal heat release of the NiCo2 O4 /Al nanothermite film has reached 2076.0 J/g at the optimal Al deposited thickness of 450 nm with the obtained optimum Al/NiCo2 O4 molar ratio of 4.9. Moreover, this design strategy is highly compatible with microelectromechanical systems (MEMs) and it can be applied to realize other nanothermites composed by bimetallic oxide and fuel. Graphical abstract: Unlabelled Image Highlights: NiCo2 O4 has been selected as an oxidizer of the nanothermite film for the first time. The morphology and heat release of the obtained nanowires thermite films can be controlled by the aluminizing thicknesses. The nanothermite film exhibits excellent heat release and short ignition time. The NiCo2 O4 /Al core-shell nanowires thermite film has the greatly potential prospect in the field of ignition materials.