Рост кристаллов при спонтанной кристаллизации в неинерциальных системах в условиях космической станции и в условиях Земли на примере синтеза и роста кристаллов CrSi-=SUB=-2-=/SUB=- из раствора-расплава Zn
Abstract The effect of the terrestrial gravitation field on crystal growth from a solution–melt during spontaneous crystallization is considered, taking into account that the space station (SS) and a laboratory at the Earth, in which the crystallization processes occur, are a noninertial system. It is shown that the specific feature that distinguishes the crystal growth in the terrestrial conditions is the pressure in the melt caused by the supporting force (the Newton third law). This pressure is absent at SS, and this fact leads to an increase in the unit cell of the melt that undergoes the first-order phase transition. As a result, the crystals grown at the SS have larger sizes than the same crystals grown in terrestrial conditions. They also exhibit an excess stress, the value of which is equal to the support pressure, which is absent at the SS. This situation is compared to the experimental data on growing CrSi_2 crystals from a solution–melt in Zn of the Cr–Si–Zn system.