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Titel: Ignition in ternary Ru/Al-based reactive multilayers : Effects of chemistry and stacking sequence
VerfasserIn: Pauly, C.
Woll, K.
Gallino, I.
Stüber, M.
Leiste, H.
Busch, R.
Mücklich, F.
Sprache: Englisch
Titel: Journal of Applied Physics
Bandnummer: 124
Heft: 19
Verlag/Plattform: AIP Publishing
Erscheinungsjahr: 2018
Freie Schlagwörter: Phase transitions
Electron microscopy
Thin films
X-ray diffraction
Combustion synthesis
Calorimetry
Aluminium
Ignition
Ruthenium
Diffusion-controlled reactions
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: While self-propagating reactions in metallic multilayers have been known since the early 1990s, the vast majority of research has been conducted on binary systems comprising either elemental or alloyed layers. The properties of reaction and ignition in these samples are, for a given composition, mainly determined by the bilayer thickness as main design parameter. Here, we present how the stacking sequence is established as an additional design parameter when going from binary to ternary layered systems. The basis for this study is reactive Ru/Al multilayers which are extended to ternary samples by introducing a third element (Ni, Pt, or Hf) as a third, individual component. It is shown that exothermic solid state reactions at the layer interfaces and grain boundaries control the ignition temperature. Furthermore, the stacking sequence determines the specific volume density of phase boundaries and, thus, the magnitude of contribution of these reactions to the process of ignition. While the addition of hafnium is found to have little to no effect on ignition, nickel and platinum lower the ignition temperatures by up to 150 °C (Ni) and 230 °C (Pt), respectively. This can be attributed to the exothermic formation of Ni2Al9, amorphous a-(Al,Pt), and Pt2Al3 which are formed at temperatures significantly lower than that of RuAl6 which is the driving reaction for ignition in binary Ru/Al multilayers.
DOI der Erstveröffentlichung: 10.1063/1.5046452
URL der Erstveröffentlichung: https://aip.scitation.org/doi/10.1063/1.5046452
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-396634
hdl:20.500.11880/35744
http://dx.doi.org/10.22028/D291-39663
ISSN: 1089-7550
0021-8979
Datum des Eintrags: 4-Mai-2023
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
NT - Systems Engineering
Professur: NT - Prof. Dr. Ralf Busch
NT - Prof. Dr. Frank Mücklich
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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