
超声辅助SiO2纳米颗粒强化铝/铜等离子弧熔钎焊工艺
樊丁, 张欢, 黄健康, 李岩, 谢宇航
超声辅助SiO2纳米颗粒强化铝/铜等离子弧熔钎焊工艺
Ultrasonic assisted SiO2 nanoparticles strengthened Al/Cu plasma arc fusion brazing welding process
利用超声波辅助纳米强化等离子弧熔钎焊工艺成功实现了铝/铜异种金属的连接,并获得了形态良好的铝/铜搭接接头。使用SEM、EDS、XRD、拉伸实验和导电性能测试等方法,分析研究了超声波和SiO2纳米颗粒对搭接接头的宏观和微观形貌、组织结构、力学性能以及导电性能的影响。结果表明:在超声波和SiO2纳米颗粒耦合作用下得到的搭接接头,液态铝在铜表面的铺展和润湿效果更好,焊缝正面成形良好,接头主要由金属间化合物层区和Al-Cu共晶区组成,金属间化合物层的厚度明显减小,接头力学性能显著提高,采用了SiO2纳米颗粒和超声波的铝/铜接头的相对电导率为153.527%IACS,导电性能有所改善。
The joining of aluminum/copper dissimilar metals is successfully achieved by ultrasonic-assisted nano-enhanced plasma arc fusion brazing, and a well-formed aluminum/copper lap joint is obtained. The effects of ultrasonic waves and SiO2 nanoparticles on the macroscopic and microscopic morphology, organizational structure, mechanical properties and conductive properties of lap joints are analyzed and studied by SEM, EDS, XRD, tensile test and conductivity test. The results show that the lap joint is obtained under the coupling action of ultrasonic waves and SiO2 nanoparticles, and the spreading and wetting effect of liquid aluminum on the copper surface is better, the front side of the weld is well formed, and the joint is mainly composed of intermetallic compound layer region and Al-Cu eutectic region. The thickness of the intermetallic compound layer is reduced obviously,and the mechanical properties of the joint is significantly improved. The relative conductivity of the aluminum/copper joint using SiO2 nanoparticles and ultrasonic waves is 153.527%IACS, exhibiting improved mechanical properties and electrical conductivity.
超声振动 / SiO2纳米颗粒 / 金属间化合物 / 力学性能 / 导电性能
ultrasonic vibration / SiO2 nanoparticle / intermetallic compound / mechanical property / electrical conductivity
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