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Shape of ammonium chloride dendrite tips at small supersaturation

机译:小饱和度时氯化铵枝晶尖端的形状

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We report detailed shape measurements of the tips of three-dimensional NH4Cl dendrites grown from supersaturated aqueous solution. For growth at small supersaturation, we compare two models for the tip shape: parabolic with a fourth-order correction and a power law. Neither is ideal, but the fourth-order fit appears to provide the most robust description of both the tip shape and position for this material. For that fit, the magnitude of the fourth-order coefficient is about half of the theoretically expected value. (C) 2004 Elsevier B.V. All rights reserved.
机译:我们报告了从过饱和水溶液中生长的三维NH4Cl树突尖端的详细形状测量。对于小过饱和状态下的生长,我们比较了两种尖端形状的模型:抛物线形的四阶校正和幂定律。两者都不是理想的,但是四阶拟合似乎可以提供这种材料的尖端形状和位置的最可靠描述。为此,四阶系数的大小约为理论期望值的一半。 (C)2004 Elsevier B.V.保留所有权利。

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