Characterizing the Soldering Alloy Type Zn–Al–Cu and Study of Ultrasonic Soldering of Al7075/Cu Combination
| Autor: | Martin Sahul, Igor Kostolny, Jaromír Drápala, Roman Kolenak, Paulina Babincova |
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| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
ultrasonic Materials science soldering Alloy Intermetallic chemistry.chemical_element 02 engineering and technology Zinc engineering.material 01 natural sciences 0103 physical sciences Shear strength General Materials Science shear strength lcsh:Mining engineering. Metallurgy Eutectic system 010302 applied physics intermetallic compounds Metallurgy Metals and Alloys Ultrasonic soldering 021001 nanoscience & nanotechnology Copper chemistry Soldering engineering 0210 nano-technology |
| Zdroj: | Metals Volume 11 Issue 1 Metals, Vol 11, Iss 27, p 27 (2021) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met11010027 |
| Popis: | The aim of the research was to characterize the soldering alloy type Zn&ndash Al&ndash Cu and study the fluxless ultrasonic soldering of the combination of aluminum alloy type Al7075 with copper substrate. The Zn&ndash Cu solder is of the close-to-eutectic type with two phase transformations: the eutectic transformation at 378 ° C and the eutectoid transformation at 285 ° C. The solder microstructure is formed of a matrix composed of the solid solutions of aluminum (Al) and zinc (Zn) in which the copper phases CuZn4 and CuAl2 are precipitated. The shear strength of the soldering alloy type Zn5Al with copper addition reaches values from 167 to 187 MPa and it depends on the copper content in the solder. The bond with aluminum alloy type Al7075 is formed due to the solubility of Al in zinc solder at the formation of solid solution Al. Contrary to this observation, the bond with the copper substrate is in this case formed due to the interaction of zinc and aluminum with the copper substrate. Two new intermetallic phases, namely Al(Cu,Zn)2 and Cu3.2Zn0.7Al4.2, were formed. The average shear strength of Al7075/Zn5Al3Cu/Cu joints attained was 134.5 MPa. For comparison, the Cu/Zn5Al3Cu/Cu joint attained an average shear strength of 136.5 MPa. |
| Databáze: | OpenAIRE |
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