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Microelectronics reliability v.69, 2017년, pp.80 - 87  

Effects of temperature and span amplitude on fretting corrosion behavior of tin-plated electrical contacts

Kim, M.J. ; Kim, H.K. ;
  • 초록  

    Fretting tests on electric contacts were conducted to investigate the effects of temperature and contact span amplitude on fretting corrosion behavior at 298K, 323K, 348K and 373K under a constant force of 0.85N. Riders and flats made of 0.3mm-thick brass sheet were coated with 10μm of tin. The electric resistance was measured during the fretting test period. The electric resistance was very low; afterward, however, the resistance increased rapidly and intermittently with the number of fretting cycles. Electric failure lifetime (N f ) was found to decrease with increase in the testing temperature. It was assumed the failure cycle is a cycle with an electric resistance of 0.01Ω. The damage rate (D@?) due to the degrading of the contact was inverse-linearly proportional to the number of cycles. A formula for lifetime prediction was developed by applying the Arrhenius equation. Using this formula, the lifetime can be predicted within a factor of two in a range below 35μm span amplitude.


  • 주제어

    Fretting corrosion .   Electric contact .   Failure lifetime.  

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