αFe-N体系的统计热力学分析  

STATISTICAL THERMODYNAMICS OF αFe-N SYSTEM

作　　者：周灿栋[1] 金冰忠[1] 樊俊飞[1] 乐海荣[1] 蒋国昌[2] 

机构地区：[1]宝钢股份公司技术中心,上海201900 [2]上海大学上海市钢铁冶金重点实验室

出　　处：《上海金属》2005年第3期50-56,共7页Shanghai Metals

摘　　要：借助统计热力学方法和正规溶液模型法估计了在αFe-N体系中氮原子与其周围最近邻氮原子之间的相互作用。两种方法估计的N-N相互作用都为排斥力,且随温度变化而变化。还估计了不同温度下ENFe、EFeFe等参数。氮的加入改变了铁晶体的晶格参数,使铁原子与铁原子之间的键能发生了改变。氮在αFe晶体的晶格中的分布接近于随机。The interaction energy of N-N pairs in αFe-N system was evaluated through statistical thermodynamics and regular solution model. The N-N interactions were found to be exclusion in nature, therefore, they varied with the temperature. The parameters of the interaction energy of N-Fe pairs and Fe-Fe pairs at different temperature were estimated by statistical thermodynamic method too. The addition of nitrogen changed the lattice parameters of αFe crystal so that the bond energy of Fe-Fe pair was altered. The calculation results displayed that nitrogen was randomly distributed in the interstitial octahedral positions of the αFe lattice.

关 键 词：热力学分析 统计 相互作用 热力学方法 正规溶液 温度变化 晶格参数 Α-FE 氮原子 铁原子 最近邻 估计 模型法 排斥力 等参数 晶体 键能 

分 类 号：O645.164[理学—物理化学] TK123[理学—化学]