含有Sb的微观结构和EutecticSnPb接的机械性能的影响
Xiuchen Zhao1, Jiahui Chang1, Xuefeng Wu1
1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel, Switzerland)
|May 25, 2024
概括
将 (Sb) 添加到锡- (SnPb) 上,可以显著提高其机械性能和抗爬能力. 这种改进归因于SbSn金属间化合物的形成,这些化合物阻碍了脱位运动并减少了粒边界滑动,使其在航空航天应用中更可靠.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 固体力学 固体力学是什么
背景情况:
- 锡- (SnPb) 合剂由于其高可靠性,对航空航天电子包装至关重要.
- 由于SnPb的爬行阻力较差,使其在应力下的性能受到限制.
- 合金元素可能会提高SnPb的爬行阻力.
研究的目的:
- 为了研究添加 (Sb) 对微观结构,拉力和SnPb溶的爬行性能的影响.
- 了解Sb含量在提高SnPb的机械性能方面的作用.
- 为了阐明Sb修改SnPb合剂中改善的爬行抵抗背后的机制.
主要方法:
- 在SnPb溶中Sb含量的系统变化.
- 微结构分析用于识别金属间化合物 (IMC).
- 拉力测试用于评估机械强度.
- 爬行测试以确定稳定状态的爬行速率和应力指数 (n).
主要成果:
- 添加Sb改善了SnPb的整体机械性能.
- 当Sb含量超过1.7%时形成的SbSn金属间化合物 (IMCs).
- 增加Sb含量提高了拉力强度,并显著降低了稳定状态的爬行速率.
- 应力指数 (n) 随着Sb的增加而增加,表明增强的爬行阻力.
结论:
- 反是一种有效的合金元素,可以提高SnPb的爬行阻力.
- 增强的爬行阻力归因于SbSn IMCs阻碍脱位运动和减少谷物边界滑动.
- 经过Sb修改的SnPb合剂显示出在苛刻的航空航天应用中可提高可靠性的潜力.
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