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mixed entropy
相关语句
  混合熵
    The Difference between the Integral Constants and the Mixed Entropy for Perfect Gases
    理想气体熵积分常数之差与理想气体混合熵
短句来源
    It is impossible to obtain the mixed entropy from thermodynamical formulation of entropy, and we give a physics model of solving the mixed entropy.
    指出不能只利用理想气体的热力学熵表达式求其混合熵 ,并给出求混合熵的物理模型
短句来源
  混合熵
    The Difference between the Integral Constants and the Mixed Entropy for Perfect Gases
    理想气体熵积分常数之差与理想气体混合熵
短句来源
    It is impossible to obtain the mixed entropy from thermodynamical formulation of entropy, and we give a physics model of solving the mixed entropy.
    指出不能只利用理想气体的热力学熵表达式求其混合熵 ,并给出求混合熵的物理模型
短句来源
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It is impossible to obtain the mixed entropy from thermodynamical formulation of entropy, and we give a physics model of solving the mixed entropy.

指出不能只利用理想气体的热力学熵表达式求其混合熵 ,并给出求混合熵的物理模型

Making use of the hard sphere model in binary colloid, the mechanism of entropy-driven phase transitions was discussed, where the excluded volume plays an important role. Increasing the free volume of small spheres (namely, the excluded volume decreasing) will raise the translational entropy of binary colloid system, at the expense of lowering the mixing entropy. As the solution concentration increasing, it is necessary for the small spheres to have a high enough translational entropy...

Making use of the hard sphere model in binary colloid, the mechanism of entropy-driven phase transitions was discussed, where the excluded volume plays an important role. Increasing the free volume of small spheres (namely, the excluded volume decreasing) will raise the translational entropy of binary colloid system, at the expense of lowering the mixing entropy. As the solution concentration increasing, it is necessary for the small spheres to have a high enough translational entropy to make,the phase separation occur and the suspension be macroscopically orderly.

利用二元胶体的硬球模型,讨论了胶体的熵驱动相变机制,排斥体积发挥了重要作用,增加小球的自由体积,导致系统的平移熵增加,同时系统的混合熵减少,随着溶液浓度增加,必须保证小球有足够的平移熵,导致系统相分离的发生,溶液呈现宏观有序.

On the basis of analyzing the thermodynamic model of regular melt, the mixing enthalpy ΔH~ mix and the mixing entropy ΔS~ mix of typical metallic glass melts were calculated. The distribution of ΔH~ mix vs. ΔS~ mix for typical metallic glasses was generalized, and a strategy for pinpointing metallic glass formers has been proposed by combining the critical cooling rate R_c based on the atomic intrinsic characteristics of the alloys including atom size, composition, and mixing...

On the basis of analyzing the thermodynamic model of regular melt, the mixing enthalpy ΔH~ mix and the mixing entropy ΔS~ mix of typical metallic glass melts were calculated. The distribution of ΔH~ mix vs. ΔS~ mix for typical metallic glasses was generalized, and a strategy for pinpointing metallic glass formers has been proposed by combining the critical cooling rate R_c based on the atomic intrinsic characteristics of the alloys including atom size, composition, and mixing enthalpy of binary systems among the components. On the condition of ΔS~ mix greater than 0.6 J·K~ -1 mol~ -1 and ΔH less than -15 kJ·mol~ -1 , the alloy tends to form a bulk metallic glass(BMG). It shows that R_c is intimately related with ΔS~ mix , and can be expressed as R_c=42.24×10~4 exp(-13.91 ΔS~ mix )+19.66. Two new glass formers, Zr_ 40 Al_ 10 Ni_ 15 Cu_ 35 , located far from the glass forming area of the existing Zr-Al-Ni-Cu BMGs with a content of 55at%—65at% zirconium, and Fe_ 53 Co_5Nd_ 12 B_ 30 of quaternary Fe-B-based BMG, were successfully prepared with this approach.

通过分析规则熔体的热力学模型,计算了典型金属玻璃的熔体混合焓ΔHmix和混合熵ΔSmix.结合临界冷却速率,归纳出典型金属玻璃形成液体的热力学特性,并提出基于原子尺寸、元素组成以及元素之间混合焓等参数的形成大块金属玻璃的成分判定方法.结果表明,当ΔHmix<-15kJ·mol-1且ΔSmix>0·6J·K-1mol-1时,合金易于形成大块金属玻璃.金属玻璃的临界冷却速率Rc具有明显的尺寸效应,其值与熔体的ΔSmix值呈指数关系,可以用Rc=42·24×104exp(-13·91ΔSmix)+19·66粗略判断.运用该方法成功设计并制备出远离原有Zr基大块金属玻璃形成区域(55at%—65at%Zr)的Zr40Al10Ni15Cu35和四元Fe-B基Fe53Co5Nd12B30大块金属玻璃.

 
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