Wplyw zawartosci fosforu na zwilzalnosc podlozy z pokryciem Ni-P lutowiem SAC305/Effect of phosphorus content on the wettability of Ni-P coated surfaces by SAC305 alloy

The aim of this study was to determine the effect of the chemical composition of Ni-P coating on the wettability kinetics of SAC305 liquid solder in contact with the Ni-P coating. The study was conducted in vacuum, at 230 degrees Celsius for 5 minutes, using the sessile drop method in combination with a separate heating of the two test materials, allowing for experimental determination of the contact angle ... . The study used a SAC305 solder and a nickel substrate onto which Ni-xP coating of two different levels of phosphorous was applied. It was found that, for the selected range of 4.3 less than or equal to P less than or equal to 11.6, increase in the phosphorus content in the coating improves the wettability of the liquid systems tested with the SAC305 solder, but it is an apparent effect resulting from the solder's penetration of the structural discontinuities formed in the layer of Ni-11.6P, due to phase transitions. (ProQuest: ... denotes formulae/symbols omitted.)