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含能材料  2015 

不同贮存环境下SCB电极塞的失效机理

DOI: 10.11943/j.issn.1006-9941.2015.02.012

Keywords: 火工品 SCB电极塞 加速寿命试验 腐蚀

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Abstract:

为获取半导体桥(SCB)火工品在长贮过程中的失效模式和失效机理, 用加速寿命试验、电阻试验和扫描电镜试验, 研究了某不镀金SCB电极塞在不同环境下贮存前后的电阻和形貌变化。结果表明, 单一温度(71 ℃)应力未导致SCB电极塞腐蚀和电阻增大。温湿度(80 ℃, RH=95%)应力导致SCB电极塞脚线的缓慢腐蚀和电阻的轻微增大。在温湿度(80 ℃, RH=95%)应力下, 粘有盐水的SCB电极塞贮存后焊点出现严重腐蚀现象。得出了氯离子加速SCB电极塞的腐蚀, 且焊点的腐蚀程度可用SCB电极塞阻值大小来判断的结论,即SCB电极塞的阻值越大, 焊点的腐蚀程度越深

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