(中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 運(yùn)用Miedema理論，系統(tǒng)計(jì)算Fe，B與Cu，Mo，Ni，Cr，V，Ga，Nb，Hf和Zr等元素形成合金系時(shí)的熱力學(xué)性質(zhì)。運(yùn)用理想溶液理論，計(jì)算1 600 K時(shí)該二元合金系的過剩Gibbs自由能、過剩熵和活度。結(jié)果表明，在FeMB體系中，Fe-Zr-B的混合焓最小；1 600 K時(shí)Fe-M-B體系的過剩Gibbs自由能與其混合焓相似，其過剩熵趨近于零，活度相對于理想溶液偏差極小，在實(shí)際應(yīng)用中可忽略不計(jì)。
關(guān)鍵字: FeMB納米晶軟磁材料；Miedema理論；熱力學(xué)參數(shù)
（School of Materials Science and Engineering, Central South University,Changsha 410083, China）
Abstract: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
Key words: FeMB nanocrystalline soft magnetic alloy; Miedema theory; thermodynamic parameter
