dc.contributor.author | Larsson, Andreas | |
dc.contributor.author | Aasmundtveit, Knut | |
dc.date.accessioned | 2020-12-03T12:12:11Z | |
dc.date.available | 2020-12-03T12:12:11Z | |
dc.date.created | 2020-03-27T15:13:28Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Larsson, A. & Aamundtveit, K. E. (2020). On the Microstructure of Off-Eutectic Au-Ge Joints: A High-Temperature Joint. Metallurgical and Materials Transactions A, 51(2), 740-749. | en_US |
dc.identifier.issn | 1073-5623 | |
dc.identifier.uri | https://hdl.handle.net/11250/2711702 | |
dc.description.abstract | Joining delicate electronic components for high-temperature applications is challenging. Regular soldering with lead-free or lead-based materials is typically not suitable for high-temperature applications due to their low melting points. Using off-eutectic compounds for joints offer an easy and gentle process creating joints that can be formed at a lower process temperature than the final operation temperature. Microstructural evolution near the eutectic melting point is key to be able to form reliable joints. A layered Au/eutectic Au-Ge/Au structure was used to form Au-rich off-eutectic Au-Ge joints. Columnar-like structures of primary α-phase (Au) protruded through a Ge-rich off-eutectic Au-Ge mixture at the center of the joint. These structures connect the joined pieces with a single solid phase with a melting point of ca. 1064 °C. The microstructure coarsened when exposed to temperatures between 300 °C and 380 °C, i.e., near the eutectic melting point at 361 °C. Ge diffused and accumulated along grain boundaries between Au grains. Annealing above the eutectic melting point, Ge rapidly diffused and formed larger colonies of pure Ge surrounded by a Au matrix. This accords well with our previously published results demonstrating shear strength capacity of similar joints at temperatures well above the eutectic temperature. | en_US |
dc.language.iso | eng | en_US |
dc.title | On the Microstructure of Off-Eutectic Au-Ge Joints: A High-Temperature Joint | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.rights.holder | Copyright © 2019, The Minerals, Metals & Materials Society and ASM International. | en_US |
dc.source.pagenumber | 740-749 | en_US |
dc.source.volume | 51 | en_US |
dc.source.journal | Metallurgical and Materials Transactions A | en_US |
dc.source.issue | 2 | en_US |
dc.identifier.doi | https://doi.org/10.1007/s11661-019-05530-4 | |
dc.identifier.cristin | 1803992 | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |