液态金属凝固与形核热力学中有关公式的校正  

Correction of Relative Formulate on Consolidation and Nucleation Thermodynamics for Liquid Metals

作　　者：蔡安辉[1] 安伟科[1] 陈敏[2] 李小松[1] 谭晶莹[1] 周勇[1] 罗云[1] 

机构地区：[1]湖南理工学院机电系,湖南岳阳414000 [2]湖南理工学院物电系,湖南岳阳414000

出　　处：《湖南文理学院学报（自然科学版）》2007年第4期67-68,76,共3页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：国家自然科学基金(50774034);湖南省自然科学基金(06JJ20005);湖南省教育厅科研项目(06B038;05A055);湖南省教育科学"十一五"规划课题(XJK06CGD070);湖南理工学院教研教改项目(2007B06)

摘　　要：分析了教材中关于液态金属凝固热力学条件和形核热力学中的公式推导过程,发现教材中存在参数的量纲前后不一致而得出错误结果的现象;通过统一量纲,获得了均质形核的正确临界晶核半径计算式,并通过实例对其正确性进行了检验.结果表明,所获得的临界晶核半径计算式正确.One of the important problems for materials science is the thermodynamics of solidification and nucleation. The derivation procedure of the formulae relating to consolidation and nucleation thermodynamics for liquid metals in some teaching materials was analyzed in this paper. It is found that there is dimensional heterogeneity of some parameters, resulting in the wrong results. By unifying the dimension of parameters, the corrective relationship of the critical diameter of crystal nucleus for homogeneous n...

关 键 词：液态金属 凝固热力学 形核热力学 

分 类 号：TG111.4[金属学及工艺—物理冶金]