| 词条 | Alpha factor |
| 释义 |
The α-factor is used to predict the solid–liquid interface type of a material during solidification. MethodAccording to John E. Gruzleski in his book Microstructure Development During Metalcasting (1996): α = (L/k*TE)*(η/v) where L is latent heat of fusion k is Boltzmann’s constant TE is equilibrium freezing temperature η is the number of nearest neighbours an atom has in the interface plane v is the number of nearest neighbours in the bulk solid Since L/TE = ΔSf where ΔSf is the molar entropy of fusion of the material α = ΔSf/k(η/v) According to Martin Glicksman in his book Principles of Solidification : An Introduction to Modern Casting and Crystal Growth Concepts(2011): α = ΔSf/Rg(η1/Z) where Rg is the universal gas constant, (η1/Z) is similar to previous, always 1/4<(η1/Z)<1 1 : Materials science |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。