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- 2017
SnZnPr-xAu无铅钎料性能与组织
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Abstract:
研究了微量纳米Au颗粒对SnZnPr无铅钎料性能与组织的影响。研究结果表明，微量的纳米Au颗粒可以显著改善SnZnPr钎料的润湿性和焊点力学性能，通过优化设计证明纳米Au颗粒的最佳添加量为0.1%，但添加纳米Au颗粒过量时，钎料的润湿性明显下降，焊点的力学性能基本不变。对SnZnPr和SnZnPr-0.1Au钎料组织研究发现0.1%纳米Au颗粒可以显著细化基体组织，特别是减小富Zn相的尺寸，通过纳米压痕实验证明0.1%纳米颗粒可以显著提高SnZnPr钎料的抗蠕变性能，热循环实验证明0.1%纳米Au颗粒可以将QFP100器件SnZnPr焊点热疲劳寿命提高12.3%，主要归因于纳米颗粒对位错的钉扎作用。
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