# CityUHK researchers reshape understanding of grain boundaries

**URL:** <https://community.materialssquare.com/t/cityuhk-researchers-reshape-understanding-of-grain-boundaries/763>\
**Category:** News\
**Created:** [October 14, 2024, 4:09pm UTC](https://community.materialssquare.com/t/cityuhk-researchers-reshape-understanding-of-grain-boundaries/763 "2024-10-14T16:09:52Z")\
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**Author:** ![gabriele1](https://yyz1.discourse-cdn.com/flex003/user_avatar/community.materialssquare.com/gabriele1/32/20_2.png) [@gabriele1](https://community.materialssquare.com/u/gabriele1)\
**Post date:** [October 14, 2024, 4:09pm UTC](https://community.materialssquare.com/t/cityuhk-researchers-reshape-understanding-of-grain-boundaries/763/1 "2024-10-14T16:09:52Z")

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Researchers at City University of Hong Kong (CityUHK) have reshaped the understanding of grain boundaries in crystalline materials. They discovered that grain-boundary mobility is direction-dependent, challenging the traditional belief that it is constant. Their study reveals that grain boundaries can move unidirectionally without external force, similar to a Brownian ratchet mechanism. This breakthrough has significant implications for controlling the microstructural evolution of materials and improving material properties. The findings are published in _Science_.

For more details, visit CityUHK:

> **[CityUHK researchers reshape understanding of grain boundaries | City...](https://www.cityu.edu.hk/media/news/2024/10/14/cityuhk-researchers-reshape-understanding-grain-boundaries)**
>
> Research team at CityUHK: (from right) Qiu Caihao, Professor Han, and Wang Siqi (another author)

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