Difference between revisions of "Physical Effects in Sliding and Connector Contacts"
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| − | === | + | ====6.4.5 Physical Effects in Sliding and Connector Contacts==== |
| − | '''Mechanical wear of sliding contacts''' | + | *'''Mechanical wear of sliding contacts''' |
| − | + | dV/dx = k x FK /3 HW | |
| − | + | 3 dV/dx Wear volume in mm per slide path length in mm | |
| − | + | k Coefficient of frictional wear | |
| − | + | HW Hardness of the softer material | |
| − | + | (Brinell or Vickers units) | |
| − | + | FK Contact force in cN | |
| − | + | Wear coefficient k during material transfer | |
| − | + | -4 Silver – Silver 120 x 10 | |
| − | + | -4 Platinum – Platinum 400 x 10 | |
| − | + | -4 Silver – Platinum 1.3 x 10 | |
| − | + | Coefficient of fractional wear k during wear loss | |
| − | + | -4 Silver – silver 8 x 10 | |
| − | + | -4 Gold – gold 9 x 10 | |
| − | + | -4 Platinum – platinum 40 x 10- | |
| − | + | 4 Silver – gold 9 x 10 | |
| − | + | -4 Silver – platinum 5 x 10 | |
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| + | Fig. 6.15: Coefficient of frictional wear for the wear loss of sliding contacts Silver/Silver | ||
| + | and hard gold/hard gold as a function of the contact force | ||
| + | *'''Contact behavior of connectors''' | ||
| + | Fig. 6.16: Contact resistance R as a function k | ||
| + | of the contact force F for different surface k | ||
| + | coating materials. Measured against a | ||
| + | spherical gold probe; I = 10 mA, U < 20 mV | ||
| − | + | Fig. 6.17: Contact resistance R as a function k | |
| + | of the fretting wear cycles for different surface | ||
| + | coating materials | ||
| − | + | Tab.6.4: Surface Coating Materials for Connectors | |
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==References== | ==References== | ||
| − | [[Application Tables and | + | [[Application Tables and Guidance Data for the Use of Electrical Contacts#References|References]] |
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Revision as of 14:51, 7 January 2014
6.4.5 Physical Effects in Sliding and Connector Contacts
- Mechanical wear of sliding contacts
dV/dx = k x FK /3 HW 3 dV/dx Wear volume in mm per slide path length in mm k Coefficient of frictional wear HW Hardness of the softer material (Brinell or Vickers units) FK Contact force in cN Wear coefficient k during material transfer -4 Silver – Silver 120 x 10 -4 Platinum – Platinum 400 x 10 -4 Silver – Platinum 1.3 x 10 Coefficient of fractional wear k during wear loss -4 Silver – silver 8 x 10 -4 Gold – gold 9 x 10 -4 Platinum – platinum 40 x 10- 4 Silver – gold 9 x 10 -4 Silver – platinum 5 x 10
Fig. 6.15: Coefficient of frictional wear for the wear loss of sliding contacts Silver/Silver and hard gold/hard gold as a function of the contact force
- Contact behavior of connectors
Fig. 6.16: Contact resistance R as a function k of the contact force F for different surface k coating materials. Measured against a spherical gold probe; I = 10 mA, U < 20 mV
Fig. 6.17: Contact resistance R as a function k of the fretting wear cycles for different surface coating materials
Tab.6.4: Surface Coating Materials for Connectors
