摘要
分析计算了Cu-Ti-Zr-Nb-Ni-Si六元合金系的混合焓(ΔH)、混合熵(ΔS)、体系自由能的变化(ΔG)和临界冷却速率(Rc)。结果发现,通过适当的处理,可以计算六元合金系的ΔG;用ΔG值计算出六元合金系的Rc,Rc分别随约化玻璃转变温度(Trg)、γ和最大直径(Dmax)的增大而减小,说明此计算方法是正确的;通过线性拟合,Rc与最大直径(Dmax)的-0.73653次方是相关的,相关性显著。
Mixing enthalpy（ AH）, mixing entropy（ AS）, changes of Gibbs free energy （AG） and critical cooling rate Rc were studied and calculated in Cu-Ti-Zr-Nb-Ni-Si hexahydric alloys. The results indicate that △G in hexahydric alloys can be studied by proper transforml. Using △G Rc can be calculated. Rc decrease with increase of Trg, γ and Dmax. The calculated results show e the method is feasible. By line fitting the relationship between Rc and Dmax^-0.73653 is linear and regression equation is prominent.
出处
《铸造技术》
CAS
北大核心
2007年第4期508-511,共4页
Foundry Technology
基金
省基金项目(0311050200)
省基金项目(2003430209)
关键词
Cu基大块非晶
临界冷却速率
非晶形成能力
Cu-based bulk metallic glass
Critical cooling rate
Glass forming ability
