新型FeMB系纳米晶软磁材料的成分设计  

Component design theory for new type of FeMB nanocrystalline soft magnetic materials

作　　者：申坤[1] 汪明朴[1] 曹玲飞[1] 郭明星[1] 李树梅[1] 董琦袆 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2007年第10期1661-1666,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家高新技术研究发展计划资助项目(2002AA302505);教育部博士点基金资助项目(20040533069)

摘　　要：运用Miedema理论,系统计算Fe,B与Cu,Mo,Ni,Cr,V,Ga,Nb,Hf和Zr等元素形成合金系时的热力学性质。运用理想溶液理论,计算1 600 K时该二元合金系的过剩Gibbs自由能、过剩熵和活度。结果表明,在FeMB体系中,Fe-Zr-B的混合焓最小;1 600 K时Fe-M-B体系的过剩Gibbs自由能与其混合焓相似,其过剩熵趋近于零,活度相对于理想溶液偏差极小,在实际应用中可忽略不计。The mixing enthalpy of the alloy systems of Fe and B with Cu, Mo, Ni, Cr, V, Ga, Nb, Hf and Zr was calculated using Miedema theory. The excess Gibbs free energy, excess entropy and components activities at 1 600 K for FeMB alloy systems were calculated using the ideal solution model. The results show that the formation enthalpy of FeZrB alloy is the least among the above alloys systems. The excess Gibbs free energy is similar with the mixing enthalpy. The excess entropy of FeMB at 1 600 K approaches zero, and the activities curves show infinitesimal deviation from the ideal solution which can be neglected in practice.

关 键 词：FeMB纳米晶软磁材料 MIEDEMA理论 热力学参数 

分 类 号：TM271[一般工业技术—材料科学与工程]