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Материал из Поле цифровой дидактики
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- Solid Diffusion (model) + (This model demonstrates a solid diffusion … This model demonstrates a solid diffusion couple, such as copper and nickel. In a real laboratory, such experiment would take place at very high temperatures, for the process to take place in a reasonable amount of time (note that the diffusion coefficient varies exponentially with the inverse of the temperature). There are many mechanisms for diffusion in solids. In this model we demonstrate one of them, which is caused by missing atoms in the metal crystal. The locations, of the missing atoms are often called vacancies. Therefore, this type of diffusion mechanism is referred to as "vacancy diffusion". The extent to which the diffusion can happen depends on the temperature and the number of vacancies in the crystal.nd the number of vacancies in the crystal.)
