Introduction of an exponential formulation to quantify the electrical endurance of micro-contacts enduring fretting wear: Application to Sn, Ag and Au coatings

Correlation between friction and wear properties and electrical performance of silver coated electrical connectors

“…Most studies focus on the conventional thickness of coatings of up to 5 mm [13][14][15][16][17][18]. Even within this very small range of coating thickness, the nonlinearity of the correlation between the lifetime of electrical contacts and the coating thickness was observed.…”

“…Even within this very small range of coating thickness, the nonlinearity of the correlation between the lifetime of electrical contacts and the coating thickness was observed. The authors of previous studies defined a threshold thickness and identified the linear correlation between the lifetime and the coating thickness [15,18]. The requirements for many new applications have however been increased, for instance in the case of extremely high wear resistance of the coatings used for charging devices for electrical vehicles.…”

Quantification of the electrical contact endurance of thin platted silver coatings subjected to fretting wear: influence of coating thickness

“…After [15] (b) Fig.1 Illustration of the quantitative approach developed in [15]: (a) Identification of the finite and infinite endurance behaviour, (b) Quantification of the electrical endurance in the finite endurance domain using an exponential formalism (After [15]) Park et al [8,9] performed extensive researches focusing on mechanical and environmental influences like temperature and corrosion processes reducing the electrical endurance (i.e. fretting cycles below which the electrical contact resistance remains lower than a threshold failure value).…”

Copper-Reductant Composite for Long-Life Electrical Contact

“…3,4) These metal oxide layers and wear metal oxide particles formed by fretting corrosion caused by repetition slide between each slide members often increase contact resistance of the electrical contacts. 5) A fretting corrosion occurs notably in the electrical contacts which have longdistance repetition sliding surfaces caused by the increase of the difference of the thermal expansion between each slide members in the electronic products applied in large range heat cycle. The use of nickel/gold plated electrodes provides one solution for avoiding the fretting corrosion, where the surface of the electrode is covered with a non-oxidizing plated film of gold, so the fretting corrosion does not occur.…”