High-throughput screening of critical size of grain growth in gradient structured nickel
High-throughput screening of critical size of grain growth in gradient structured nickel
复制标题
梯度结构镍晶粒生长临界尺寸的高通量筛选
DOI：
10.1016/j.jmst.2020.11.070
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发表时间：
2021-01-23
影响因子：
10.9
通讯作者：
Li, Yi
中科院分区：
文献类型：
--
作者：
Lu, Yunli;Duan, Fenghui;Li, Yi
具有高吉布斯自由能的纳米晶金属具有强烈的热驱动晶粒生长的趋势，因此了解晶粒生长的临界尺寸或温度对其应用至关重要。热稳定性的研究通常是在具有均匀结构的材料上进行的，然而，这些方法耗时且昂贵。在目前的工作中，我们揭示了一个高通量的实验策略，通过退火的梯度结构镍的尺寸依赖的热稳定性进行表征。采用这种方法，在给定的退火温度下，晶粒生长的临界尺寸（d（c））被快速确定。当在503 K下退火3 h时，晶粒生长的临界尺寸类似于95 nm，这与均匀结构Ni中报道的值一致。此外，发现该临界尺寸在三种类型的梯度结构Ni中是相同的，即，独立于梯度结构。我们目前的工作展示了一种高通量的策略，探索晶粒生长的临界尺寸和尺寸依赖的金属热稳定性。(C)2021由Elsevier Ltd代表Journal of Materials Science & Technology编辑部出版。
Nanocrystalline metals with high Gibbs free energy have a strong tendency towards thermally driven grain growth, thus understanding the critical size or temperature of grain growth is vital for their applications. The investigations of thermal stability were usually conducted on the materials with a homogeneous structure; however, these methods are time-consuming and expensive. In the present work, we reveal a high-throughput experimental strategy to characterize the size-dependent thermal stability via annealing the gradient structured Ni. Employing this method, the critical size of grain growth (d(c)) at a given annealing temperature was rapidly determined. The critical size of grain growth was similar to 95 nm when annealed at 503 K for 3 h, which is consistent with the value reported in the homogeneous structured Ni. Furthermore, this critical size was found to be identical in three types of gradient structured Ni, i.e., independent on the gradient structure. Our present work demonstrates a high-throughput strategy for exploring the critical size of grain growth and size-dependent thermal stability of metals. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.