Effects of temperature and span amplitude on fretting corrosion behavior of tin-plated electrical contacts. (February 2017)

• Record Type: Journal Article
• Authors: Kim, Min-Jung; Kim, Ho-Kyung
• Is Part Of: Microelectronics and reliability. Volume 69(2017)
• Page Start: 80
• Page End: 87
• Publication Date: 2017-02
• Subjects: Fretting corrosion -- Electric contact -- Failure lifetime; Electronic apparatus and appliances -- Reliability -- Periodicals; Miniature electronic equipment -- Periodicals; Appareils électroniques -- Fiabilité -- Périodiques; Équipement électronique miniaturisé -- Périodiques; Electronic apparatus and appliances -- Reliability; Miniature electronic equipment; Periodicals; 621.3815
• DOI: 10.1016/j.microrel.2016.12.014
• Languages: English
• ISSNs: 0026-2714

Abstract

Abstract: Fretting tests on electric contacts were conducted to investigate the effects of temperature and contact span amplitude on fretting corrosion behavior at 298 K, 323 K, 348 K and 373 K under a constant force of 0.85 N. Riders and flats made of 0.3 mm-thick brass sheet were coated with 10 μm 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 0.01 Ω. 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 35 μm span amplitude. Highlights: Electric failure lifetime was found to decrease with increase in the testing temperature. A formula for lifetime prediction was developed by applying the Arrhenius equation. The lifetime can be predicted within a factor of two.