本文基于纯金属中的原子/空位双组元模型,由空位的偏摩尔自由能定义给出了金属晶体中空位化学位的表达式.对于含有空位摩尔浓度为Cν,其热力学平衡态空位摩尔浓度为C0的纯金属晶体,在环境温度为T时,其空位化学位的表达式则为:μν(Cν)=RT+RTln(Cν/C0);热力学平衡态时为:μν(C0)=RT.上式中的第二项为由J.P.Hirth[1]所给出的"相对于标准(热力学平衡)态的空位化学位",而第一项则为本文所给出的"标准(热力学平衡)态的空位化学位".
In this paper, a concept, the chemical potential of vacancies in metal crystals, has been derived from the partial mole free energy of vacancies, based on a model of an atom-vacancy binary solution. For a pure metal crystal containing the mole concentration of vacancies, Cy and it's value in thermal equilibrium, C0, at temperature T, the chemical potential can be expressed respectively as:μν(Cν)=RT[1+ln(Cν/C0)] andμν(C0)=RT The second term in μν(Cν) is the chemical potential of the vacancies referred to the standard-state concentration given by J.P. Hirth[1] and first term is the standard-state one presented
参考文献
| [1] | John Price Hirth;Jens Lothe.Theory of Dislocations[M].New York:San Francisco,Toronto,London,Sydney:McGRAW-Hill Book Company,1968:507. |
| [2] | Robert E Reed.Physical Metallurgy Principles[M].New York:D Van Nostrand Company,1964:167. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%