Preprint Article Version 2 This version not peer reviewed

Influence of Nanoscaled Surface Modification on the Reaction of Al/Ni Multilayers

Version 1 : Received: 9 November 2017 / Approved: 10 November 2017 / Online: 10 November 2017 (03:02:55 CET)
Version 2 : Received: 3 December 2017 / Approved: 4 December 2017 / Online: 4 December 2017 (05:12:57 CET)

A peer-reviewed article of this Preprint also exists.

Bartsch, H.; Mánuel, J.M.; Grieseler, R. Influence of Nanoscaled Surface Modification on the Reaction of Al/Ni Multilayers. Technologies 2017, 5, 79. Bartsch, H.; Mánuel, J.M.; Grieseler, R. Influence of Nanoscaled Surface Modification on the Reaction of Al/Ni Multilayers. Technologies 2017, 5, 79.

Journal reference: Technologies 2017, 5, 79
DOI: 10.3390/technologies5040079

Abstract

Sputtered reactive multilayers applied as a heat source in electronic joining processes are an emerging technology. Their use promises low-stress assembly of components while improving the thermal contact and reducing the thermal resistance. Nanostructured surface modifications can significantly enhance adhesion and reliability of joints between different materials. This work examines reactive multilayer of nickel and aluminum, directly sputtered on nanostructured black silicon surfaces and compares their phase transformation with reference samples deposited on pristine silicon surface. The investigation of the quenched self-propagating reaction reveals a clear influence of the nanostructured surface on the prolongation of the phase transition. Rapid thermal annealing tests result in the formation of Al1.1Ni0.9 phase. The nanostructured interface seems to hinder the full transformation of the parent material. The surface modification improves the adhesion of the formed alloy on silicon surfaces and can possibly increase the reliability of joints based on reactive aluminum/nickel multilayer. The use of black silicon, a nanostructured surface modification, is thus a promising approach to realize reliable multi-material joints in complex systems.

Subject Areas

reactive multilayer; sputtering; self-propagating reaction; aluminum/nickel; black silicon; joining technology; nanostructured silicon; reactive nanomaterial

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