===<!--6.4.4 -->Switching Contacts===<ul>'''Effects during switching operations'''

<figure id="fig:fig6Histogram_of_the_contact_resistance_Rk">[[File:Histogram of the contact resistance Rk.7jpg|left|thumb|<caption>Histogram of the contact resistance R_K of an electroplated palladium layer (3 μm) with and without hard gold flash plating (0.2 μm) after exposure with different plastic materials</caption>]]</figure> <figure id="fig:Contact resistance with exposure to out gasing from plastics">[[File:Contact opening resistance with arc formation schematicexposure to out gasing from plastics.jpg|left|thumb|<caption>Contact opening resistance with exposure to out-gasing from plastics as a function of numbers of operations at 6 V_DC,100 mA: 1 Silicon containing plastic; 2 Plastics with strongly out-gasing components; 3 Plastics with arc formation (schematic)minimal out-gasing components</caption>]]

<xr id="fig:fig6.9"/> Fig. 6.9: Histogram '''Influence of corrosive gases on the contact resistance Rk of an electroplated palladium layer (3 μm) with and without hard gold flash plating (0.2 μm) after exposure with different plastic materials''' 

<figure id="fig:fig6.9Distribution of cumulative frequency H of the contact resistance for solid contact rivets">[[File:Histogram Distribution of cumulative frequency H of the contact resistance Rkfor solid contact rivets.jpg|left|thumb|<caption>Histogram Distribution of cumulative frequency H of the contact resistance Rfor solid contact rivets after 10 days exposure in a three-component test environment with 400 ppb each of H₂S, SO<sub>K2< /sub> of an electroplated palladium layer (3 μm) with and without hard gold flash plating (0NO₂ at 25°C, 75% RH; Contact force 10cN; Measuring parameters: ≤ 40 mV_DC,10 mA; Probingcontact: Gold rivet</caption>]]</figure><figure id="fig:Influences on contact areas in relays">[[File:Influences on contact areas in relays.2 μm) after exposure with different plastic materialsjpg|right|thumb|<caption>Influences on contact areas in relays</caption>]]

*'''Influence Contact Phenomena under the influence of corrosive gases on the contact resistancearcing Matertia'''<ul>'''Material transfer'''

Fig<div class="multiple-images"><figure id="fig:Material transfer under DC load">[[File:Material transfer under DC load. 6jpg|left|thumb|<caption>Material transfer under DC load a) Cathode; b) Anode. <br /> Material: AgNi0.1115; Switching parameters: Distribution of cumulative frequency H of the contact resistance for solid contact rivetsafter 10 days exposure in a three-component test environment with 400 ppb each of H12V_2DCS, SO3 A, 2x10<subsup>6</sup>2perations</subcaption> andNO]]<sub/figure>2</subdiv> at 25°C, 75% RH; Contact force 10cN; Measuring parameters: ≤ 40 mV<subdiv class="clear">DC</subdiv>,10 mA; Probingcontact: Gold rivet

*'''Contact Phenomena under the influence of arcing Matertiawelding'''*'''Material transfer'''Fig. 6.12: Material transfer under DC load a) Cathode; b) Anode.6 Material: AgNi0.15; Switching parameters: 12VDC, 3 A, 2x10 operations

*'''Arc erosion'''<div class="multiple-images"> Fig. 6.13 Arc erosion <figure id="fig:Micro structure of a Ag/SnO₂ welded contact pair after extreme arcing conditionsextremely high current load">[[File:Micro structure of a) Overall view; b) Partial detail view *'''Contact welding'''Figwelded contact pair after extremely high current load. 6.14: jpg|left|thumb|<caption>Micro structure of a welded contact pair (Ag/SnO₂ 88/12 - Ag/CdO88/12) after extremely high current load. a) Ag/SnO₂ 88/12; b) Ag/CdO88/12</caption>]]</figure></div><div class="clear"></div></ul></ul>