摘要
文中主要研究了纳米Nb颗粒对Sn-0.7Cu基复合钎料显微组织和力学性能的影响。结果表明,添加纳米Nb颗粒细化了Sn-0.7Cu复合钎料微观组织,提高了Sn-0.7Cu复合钎料的抗拉强度。当Nb含量为0.12%时抗拉强度达最大值25.36 MPa,但此时钎料的断后伸长率有所降低。Sn-0.7Cu-x Nb复合钎料的断裂模式均为塑性断裂,随Nb含量的增加,Sn-0.7Cu基复合钎料断口表面的韧窝尺寸逐渐变小,表明微量的纳米Nb可以抑制合金内Cu 6 Sn 5金属间化合物的长大。
The effect of Nb nano-particles on the microstructures and mechanical properties of Sn-0.7Cu composite solder was studied in this paper.The results showed that the microstructure of Sn-0.7Cu composite solder was refined by adding Nb nano-particles and the tensile strength of joint with Sn-0.7Cu composite solder was improved.When Nb content was 0.12%(mass fraction),the maximum tensile strength reached 25.36 MPa,but the elongation of the solder was reduced.The fracture mode of Sn-0.7Cu-x Nb composite solder was all plastic fracture.The size of dimples on the fracture surface of Sn-0.7Cu composite solder decreased gradually with the increase of Nb content,which indicated that the growth of Cu 6 Sn 5 intermetallic was inhibited by adding a small amount of Nb nano-particles.
作者
刘政
张尧成
徐宇航
刘坡
Liu Zheng;Zhang Yaocheng;Xu Yuhang;Liu Po(Guilin University of Aerospace Technology,Guilin 541004,Guangxi,China;Changshu Institute of Technology,Changshu 215500,Jiangsu,China)
出处
《焊接》
北大核心
2021年第1期24-27,60,62,63,共7页
Welding & Joining
基金
国家自然科学基金地区科学基金项目(51865006)
江苏省高校自然科学研究重大项目(19KJA430001,18KJA460001)。
