摘要
利用θ-θ液态金属X射线衍射仪研究了纯铁和Fe—C二元合金的液态结构,在此基础上给出了两种金属的微观原子结构.研究结果表明:在近熔点熔化后,液态纯铁和Fe—C合金中保持有大量的原子团簇;液态纯铁的原子团内保持有熔化前的体心立方单元,单元是共棱组合的;在液态Fe-C合金中既有Fe—C原子团簇,也有Fe—Fe原子团簇;随着温度的升高,两种金属的原子团尺寸都减小,配位数、原子间平均最近邻距离和原子团内的原子数目均减小.
Liquid structure of pure iron and Fe-C, alloy was studied with theta-theta type liquid metal Xray diffractometer. Based on this study, the microstructures of the metals were given. The experimental results show that near the melting point there are a lot of atom clusters in pure iron and Fe-C alloy melts. The atom cluster of pure iron has the body-centered cubic units as the same as its the solid state, and the body-centered cubic units connect into network by occupying the same edge. In liquid Fe-C alloy there are not only Fe-C atom clusters but also Fe-Fe atom clusters. In both of the. liquid metals, the atom cluster size, the average coordination number, the average nearest distance of atoms, and the atom number in the clusters all decrease with increasing temperature.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第1期5-9,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金59974003
国家重点基础研究发展规划G199806150402资助项目
