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首页> 外文期刊>Journal of Adhesion Science and Technology: The International Journal of Theoredtical and Basic Aspects of Adhesion Science and Its Applications in All Areas of Technology >Fatigue and failure behavior of silver-filled electronically-conductive adhesive joints subjected to elevated temperatures
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Fatigue and failure behavior of silver-filled electronically-conductive adhesive joints subjected to elevated temperatures

机译：填充银的导电胶接头在高温下的疲劳和失效行为

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摘要

The use of adhesives to replace mechanical connectors and other joining methods has enjoyed rapid growth in recent years.There are a number of issues of concern in the design of joints bonded using electronically-conductive adhesives (ECAs).One of these is the cyclic fatigue behavior of conductive adhesive interconnects under different environmental conditions,in which fatigue failure might occur due either to mechanical or thermal stresses varying in a cyclic manner.This paper addresses the effect of elevated temperatures on the fatigue and failure behavior of ECAs.For this purpose,joints were prepared using stainless steel adherend specimens bonded with a commercial ECA,and tested using monotonic and cyclic loadings,at two elevated temperatures,namely 50 deg C and 90 deg C.When the temperature was increased to 90 deg C,close to the glass transition temperature of the adhesive,we observed consistently parallel fatigue curves at different load ratios (R = P_min/P_max) for joints,as in the case of 50deg C test condition,along with significant reduction in fatigue lives.Joint failure mechanisms were also analyzed using optical techniques,and joint conductivity measurements.
机译：近年来，使用粘合剂代替机械连接器和其他连接方法迅速发展。使用电子导电粘合剂（ECA）粘结的接头设计中存在许多问题，其中之一就是循环疲劳导电胶互连件在不同环境条件下的行为，其中疲劳应力可能由于机械应力或热应力以周期性方式变化而发生。本文讨论了高温对ECA疲劳和失效行为的影响。使用与商业ECA粘合的不锈钢被粘物样品制备接头，并在50°C和90°C的两个高温下使用单调和循环载荷进行测试。当温度升高至90°C时，靠近玻璃在粘合剂的转变温度下，我们观察到在不同的载荷比（R = P_min / P_max）下，连接处始终保持平行的疲劳曲线，如在50℃的测试条件下，疲劳寿命显着降低。还使用光学技术和接头电导率测量分析了接合失效机理。

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