caa a22 4500 463231627 CHVBK 20180405153244.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-1940-z doi (NATIONALLICENCE)springer-10.1007/s10853-007-1940-z Diffusion soldering using a Gallium metallic paste as solder alloy: study of the phase formation systematics [Elektronische Daten] [Silvana Sommadossi, Horacio Troiani, Armando Fernández Guillermet] In this work preliminary results are reported on the characterization of Pb-free joints produced by using a diffusion soldering method at a process temperature of 700°C during 20min. The solder alloy is a metallic paste involving Ga and Al and Ni powder, and the substrates are Cu and Ni. The dissolution and diffusion-reaction processes, which take place at the interfaces of the interconnection zone, have been investigated by means of SEM and EPMA. A solid solution and intermetallic compounds (IMCs) with high melting point form as layers almost free from defect, allowing service temperatures about 500°C higher than the process temperature. The phase stability sequence starting from the Ni to the Cu interface is the following: α′-Ni3Ga, γ-Cu9Ga4, β-Cu3Ga and (Cu) solid solution of the Ga-Cu system. The relative reaction front displacement of the layers and the implications of the present findings for the applicability of the diffusion-soldering method are also discussed. Springer Science+Business Media, LLC, 2007 Sommadossi Silvana Facultad de Ingeniería, Universidad Nacional del Comahue/CONICET, 8300, Buenos Aires 1400, Neuquen, Argentina aut Troiani Horacio Centro Atómico Bariloche, Comisión Nacional de Energía Atómica/CONICET, Bustillo 9500, R8402AGP, San Carlos de Bariloche, Argentina aut Fernández Guillermet Armando Centro Atómico Bariloche, Comisión Nacional de Energía Atómica/CONICET, Bustillo 9500, R8402AGP, San Carlos de Bariloche, Argentina aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9707-9712 0022-2461 42:23<9707 2007 42 10853 https://doi.org/10.1007/s10853-007-1940-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1940-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sommadossi Silvana Facultad de Ingeniería, Universidad Nacional del Comahue/CONICET, 8300, Buenos Aires 1400, Neuquen, Argentina aut NATIONALLICENCE 700 1- Troiani Horacio Centro Atómico Bariloche, Comisión Nacional de Energía Atómica/CONICET, Bustillo 9500, R8402AGP, San Carlos de Bariloche, Argentina aut NATIONALLICENCE 700 1- Fernández Guillermet Armando Centro Atómico Bariloche, Comisión Nacional de Energía Atómica/CONICET, Bustillo 9500, R8402AGP, San Carlos de Bariloche, Argentina aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/23(2007-12-01), 9707-9712 0022-2461 42:23<9707 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer