Electrical Contacts

Microstructural and Chemical Analysis of AgI Coatings Used as a Solid Lubricant in Electrical Sliding Contacts

“…where T max is the maximum temperature in the contact spot, T 0 is the conductor ambient temperature, V is the voltage drop, and L is the Lorenz constant [1,17]. However, if the T max is estimated in the AgI coating, at ambient temperature, and at voltage drops from the contact resistance results below (0.001 V), the temperature will not increase by more than 1 °C, and no phase transformation occurs.…”

“…Today, noble metals are the most common materials in electrical contact applications; because of their low resistivity, ductility, and oxidation resistance [1]. The contacting surfaces are typically pressed against one another until at least one of them yields plastically to increase the electrical contact area to conduct current from one contact member to the other.…”

Ti–B–C nanocomposite coatings deposited by magnetron sputtering

“…The above structure/property-design possibilities in the Ti-B-36 C system make its coatings interesting for electrical contact applications. 37 Today, noble metals are the most commonly used materials in electrical contacts since 38 they have low resistivity and contact resistance, combined with chemical stability [12,13]. 39 The high prices and the low wear resistance in some environments motivate 40 investigations of new electrical contact materials with good electrical properties, but with 41 better mechanical properties than the noble metals.…”

<b>Wear Mechanism of Current Collecting Materials under the Effect of Flowing Electric Current</b>

“…Equation (4) shows the temperature dependence of thermal conductivity and electric resistivity according to the Wiedemann-Franz law [2]. The one-dimensional difference (5) is obtained by substituting (4) into (3) and integrating (3).…”