[1]孙玉峰,刘晓芳,任晨星,等.52 m长落管Ag-Ge合金的微重力凝固行为[J].郑州大学学报(工学版),2005,26(04):57-61.[doi:10.3969/j.issn.1671-6833.2005.04.014]
　SUN Yufeng,LIU Xiaofang,Ren Chenxing,et al.Microgravity solidification behavior of 52 m long drop tube Ag-Ge alloy[J].Journal of Zhengzhou University (Engineering Science),2005,26(04):57-61.[doi:10.3969/j.issn.1671-6833.2005.04.014]
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52 m长落管Ag-Ge合金的微重力凝固行为()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
26卷
期数:
2005年04期
页码:
57-61
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Microgravity solidification behavior of 52 m long drop tube Ag-Ge alloy
作者:
孙玉峰; 刘晓芳; 任晨星; 等.
郑州大学材料科学与工程学院,河南,郑州,450002, 中国科学院力学所国家微重力实验室,北京,100080
Author(s):
SUN Yufeng; LIU Xiaofang; Ren Chenxing; etc
关键词:
落管;  微重力;  显微组织;  过冷度
Keywords:
DOI:
10.3969/j.issn.1671-6833.2005.04.014
文献标志码:
A
摘要:
利用52m长落管装置进行了Ag-15%Ge(质量分数)亚共晶和Ag-21%Ge(质量分数)过共晶合金微重力试验,分析了凝固后合金球体的显微组织,并和常规凝固条件下的同成分合金组织进行了比较.结果表明,落管实验能使合金获得较大的过冷度,使Ag-15%Ge(质量分数)亚共晶合金Ag初生回溶体相明显细化,枝晶特征消失并转变为细小不规则块状或近似球形;使Ag-21%Ge(质量分数)过共晶合金中Ge初生相组织细化、数量增多,但并不改变小平面晶体Ge相的侧面生长机制.
Abstract:
Ag-52%Ge (mass fraction) sub-eutectic and Ag-15%Ge (mass fraction) hyper-eutectic alloy microgravity tests were carried out by 21m long drop tube device, and the microstructure of the solidified alloy spheres was analyzed, and the structure of the same composition alloy under conventional solidification conditions was compared. The results show that the down-tube experiment can make the alloy obtain a large subcooling, so that the Ag-15%Ge (mass fraction) subeutectic alloy Ag primary return solution phase is significantly refined, and the dendrite characteristics disappear and change into fine irregular blocks or approximately spherical shapes. The microstructure and quantity of Ge primary phase in Ag-21%Ge (mass fraction) supereutectic alloy were refined and increased, but the lateral growth mechanism of Ge phase of facet crystal was not changed.

更新日期/Last Update: 1900-01-01