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Micro-arc oxidation (MAO) process was carried out in a dual electrolyte system of NaAlO2 and Na3PO4 on ZK60 Mg alloys to explore the effect of electric parameters including current density, frequency, duty cycle and oxidation time on the evolution of coatings and other characteristics. The microstructural characteristics of coatings were observed by scanning electron microscopy (SEM) combined with...
In the present work, Sn-Ag-Cu-Mg (SACM) and Sn-Ag-Cu-Mg-La (SACML) lead-free solders based on near eutectic Sn-Ag-Cu (SAC) alloys were designed and fabricated. Experiments were conducted to investigate the effect of alloying on the microstructure and physical properties in aspects of melting, wetting performance by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive...
Sn-Ag-Cu-Mg lead-free solders based on a eutectic Sn-Ag-Cu alloy were prepared by means of orthogonal experimental design. The melting temperature and the wettability of Sn-Ag-Cu-Mg solders were tested by differential thermal analysis (DTA) method and SAT solder checker respectively. Combined with the microstructure analysis, the influence of trace addition of Mg on the melting points and wettability...
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