研究了热疲劳对Sn-3.5Ag共晶钎料及其复合钎料的残余机械性能和显微组织变化的影响.通过向sn-3.5Ag基体钎料中添加微量的不同种类的纳米级多面齐聚倍半硅氧烷(POSS)颗粒制成复合钎料.对接头在不同热疲劳曲线下进行热疲劳试验,通过力学性能试验和SEM分析了疲劳裂纹生长情况.结果表明,经不同周期热疲劳试验后,复合钎料接头表面损伤较Sn-3.5Ag钎焊接头得以明显改善,残余机械性能高于Sn-3.5Ag共晶钎料.
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