The growth of lamellar structure during discontinuous precipitation occurs frequently by so-called go-and-stop fashion. The results of simulation combined with the changes of Cahn’s parameter C revealed two types of such motion. The process takes place in the successive stages which can be distinguished judging from the value of C parameter. For lower values of linear growth rate (v = 10÷20 nm/s) and smaller α lamella thickness (100÷200 nm), the full cycle with relaxation takes 4–6 s. The faster movement of the reaction front (v = 30 nm/s) resulted in dramatic decrease of the full cycle to τ_total = 0.8 s. The same behavior is observed if the α lamella thickness increases beyond 200 nm at constant v equal to 10 nm/s. Both predicted types of go-and-stop motion can experimentally be observed during growth or dissolution of discontinuous precipitates. What is the reason that particular type prevails is unknown, and this is invitation for further studies especially using high-resolution transmission electron microscope operating in in situ mode.

中文翻译：

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不连续降水前沿的走停运动

在不连续的沉淀过程中，层状结构的生长经常以所谓的走走停停的方式发生。仿真结果与Cahn参数C的变化相结合，揭示了这种运动的两种类型。该过程在连续的阶段中进行，可以根据C参数的值进行区分。对于较低的线性增长率（v  = 10÷20 nm / s）和较小的α薄片厚度（100÷200 nm），具有松弛的整个周期需要4–6 s。反应前的较快移动（v  = 30纳米/秒）导致完整周期的显着降低τ_总 = 0.8秒。如果在恒定v处α薄片厚度增加到200 nm以上，则会观察到相同的行为等于10 nm / s。可以在不连续沉淀物的生长或溶解过程中通过实验观察到两种预测的走停运动类型。哪种类型占优势的原因是未知的，这尤其是使用在原位模式下运行的高分辨率透射电子显微镜的进一步研究的邀请。