Self-diffusion in liquid metals
Self-diffusion in liquid metals
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DOI：
10.1080/00018736700101425
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发表时间：
1967-04
影响因子：
--
通讯作者：
N. Nachtrieb
中科院分区：
文献类型：
--
作者：
N. Nachtrieb
本文对已发表的有关液态金属自扩散的资料进行了综述，并对D的温度依赖性进行了检验，以便在较宽的温度范围内进行研究。Log D对1/T和D对T同样代表最佳数据，而D对T 1/2和D对T 2则不是。实验上取适当的函数形式为D=CT，并从原子振动运动的观点发展了一个简单的自由扩散理论。得到了一个没有可调参数的方程（D= k2 <$DT/hk），其中κ是振动力常数。在熔点处D的计算值与钾、钠、铜和银的实验值非常一致，但低于铅、铟、锌和锡的测量值。
Abstract A survey is made of all published data on self-diffusion in liquid metals and an examination is carried out on the temperature-dependence of D for studies covering a wide range of temperatures. Log D versus 1/T and D versus T represent the best data equally well, while D versus T 1/2 and D versus T 2 do not. The proper functional form is taken to be D=CT experimentally, and a simple free diffusion theory is developed from the standpoint of vibrational atom motion. An equation having no adjustable parameters results (D=k 2 ϑ D T/hk), in which κ is the vibrational force constant. Values calculated for D at the melting point are in good agreement with experimental values for potassium, sodium, copper and silver, but are below the measured values for lead, indium, zinc and tin.