铸造技术2024，Vol.45Issue(6)：532-542,11.DOI:10.16410/j.issn1000-8365.2024.4040
定向凝固Cu-50%Sn包晶合金显微组织演变
Microstructure Evolution of Directionally Solidified Cu-50%Sn Peritectic Alloy
摘要
Abstract
With the progress of science and technology,an increasing number of peritectic alloys,such as Fe-Cr-Ni,Ti-Al,and Nd-Fe-B alloys and Cu-Sn alloys for eletronic packaging,are being widely used in industrial production fields because of their excellent properties.With the development of the electronic information industry towards miniaturization and multifunctionality,higher requirements are put forward for the mechanical,electronic and thermal properties of integrated circuits.In this paper,Cu-50 at.%Sn peritectic alloy(L+Cu3Sn→Cu6Sn5)was used as the research object.The Bridgman directional solidification method was used to observe and measure the microstructure under a microscope.When the growth distance and temperature gradient are constant,with increasing growth rate,the primary phase Cu3Sn undergoes a transformation from a cellular → cellular/dendritic → dendritic structure,and the size and spacing of the Cu3Sn phase decrease.When the growth rate and growth distance are constant,the primary phase Cu3Sn changes from a block and dendrite to a cellular structure with increasing temperature gradient.When the growth rate and temperature gradient are constant,with increasing growth distance,the primary phase Cu3Sn changes from block and cell/dendritic to cellular structure,and the size of the Cu3Sn phase is slightly refined.Based on the above experimental results,a diagram of the microstructure under different growth rates,temperature gradients and growth distances was drawn,and the influence of the solidification conditions on the microstructure of the Cu-50 at.%Sn peritectic alloy are further clarified.关键词
定向凝固/包晶合金/凝固组织/金属间化合物Key words
directional solidification/peritectic alloy/solidification microstructure/intermetallic compound分类
矿业与冶金引用本文复制引用
彭鹏,刘林,喻杨新,甘露,杨文超,徐远丽..定向凝固Cu-50%Sn包晶合金显微组织演变[J].铸造技术,2024,45(6):532-542,11.基金项目
甘肃省科技重大专项(22ZD6GB019) （22ZD6GB019）
凝固技术国家重点实验室开放课题(SKLSP202204) （SKLSP202204）
