Atom(片上系统)
热力学
二进制数
航程(航空)
订单(交换)
衍射
简单(哲学)
合金
物理
限制
铜
能量(信号处理)
比热
材料科学
量子力学
数学
财务
经济
机械工程
哲学
算术
认识论
计算机科学
工程类
复合材料
冶金
嵌入式系统
出处
期刊:Physical Review
[American Physical Society]
日期:1950-03-01
卷期号:77 (5): 669-675
被引量:1036
标识
DOI:10.1103/physrev.77.669
摘要
Short-range order parameters ${\ensuremath{\alpha}}_{i}$ are defined to express the interaction of a given atom in an alloy with the atoms of the ith shell of atoms surrounding it. From simple thermodynamic reasoning, involving a certain degree of approximation, equations relating the ${\ensuremath{\alpha}}_{i}$ with energy terms and the temperature are derived. Equations for the long-range order parameter, $S$, are obtained by considering the limiting case of $i$ very large. The values of the long- and short-range order parameters obtained by solving these equations are in good agreement with experimental values recently found by x-ray diffraction methods. The theory is extended to the calculation of configurational energy and specific heat, and to the determination of order parameters for alloys of arbitrary composition in such binary systems as that of the copper-gold alloys. In these cases qualitative agreement with experimental observations is obtained.
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