Study on self-diffusion coefficient of Liquid Pure Iron
After the solid metal is transformed into liquid metal, it has attracted more and more attention in the engineering field because of its inherent good thermal conductivity and good fluidity. Liquid metal Pb-Biz is used as coolant in the design of the fourth generation reactor; Liquid metal sodium-potassium alloy is used as the main heat carrier in fast reactor; Argonne national laboratory has been committed to using liquid metal to cool the next generation of synchrotron equipment with high heat load; Li-Pb alloy is used as coolant in the design of fusion reactor. Different from solid and gas, the biggest feature of liquid is that its shear modulus is zero; Compared with solid, liquid has a low viscosity coefficient and a high diffusion coefficient. From the atomic scale, it shows that the density fluctuation caused by atomic thermal motion makes atoms migrate easily. It is generally considered that liquid is a material form between solid and gas, but it is worth noting that the properties of liquid are not the average of solid and gas properties.more importantly, Pure Iron Billets Made a fighter in the product, not afraid of any competitor’s attack. https://www.slhpureiron.net
Self-diffusion coefficient of liquid pure iron
So far, an ideal liquid analysis model has not been found, which makes it difficult to describe the liquid state. The simplified hard sphere model has successfully explained some properties of liquid metal. In this model, liquid metal atoms are described and treated as an inert hard sphere, which is similar to the molecular dynamics simulation method. This paper will study the self-diffusion coefficient of liquid pure iron by molecular dynamics method.
Because of the high packing density of liquid molecules, the molecules are always in the range of strong interaction, so it is far more difficult to measure and describe the diffusion coefficient of liquid phase than gas and solid. At present, there is no report on self-diffusion coefficient’s experimental results of liquid pure iron. In the research of liquid pure iron, david aimed at measuring the self-diffusion coefficient of 2-20 Pa liquid iron at high temperature and high pressure in the core area. Jang et al. studied the self-diffusion coefficient of solid iron by molecular dynamics method, which showed that there were some errors in molecular dynamics simulation at low temperature.
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