Mechanical and Tribological Performances Enhanced by Self-Assembled Structures.,Advanced Materials

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Mechanical and Tribological Performances Enhanced by Self-Assembled Structures.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-08-05 , DOI: 10.1002/adma.202002004
Zhenjie Xue _{1,

2} , Xiao Li _{1,

2} , Xiangyu Chen ₁ , Chuanhui Huang ₁ , Haochen Ye ₁ , Ailin Li _{1,

2} , Tie Wang _{1,

2,

3}

Affiliation

Taking inspiration from natural materials, composite materials can be reinforced by creating matrix architectures that can better accommodate and control internal stresses. Despite the recent success in the synthesis of artificial assemblies for local reinforcement through the introduction of oriented fibers and plates into host multilayered composites, there is a lack of fundamental understanding of the factors that determine mechanical properties. Moreover, designing building blocks and interfaces that facilitate higher resistance and energy dissipation is highly challenging. When the intrinsic material is fixed, the mechanical and tribological properties can be further adjusted. In this study, europium oxide nanosheets are arranged in interlocked‐junction superstructures that resist sliding at junction points, thereby enhancing the mechanical properties of the nanosheet assemblies compared to those of the conventional face‐to‐face superstructures formed by parallel nanosheets. Furthermore, the crystalline origin of building blocks is revealed by demonstrating that faulty crystal nanosheets adopting an amorphous structure are different from single‐crystal nanosheets, with the former exhibiting superior mechanical reinforcement and improved abrasive resistance.

中文翻译：

自组装结构增强了机械和摩擦性能。

从天然材料中汲取灵感，可以通过创建可以更好地适应和控制内部应力的矩阵体系结构来增强复合材料。尽管最近通过将定向的纤维和板引入主体多层复合材料而成功合成了用于局部增强的人造组件，但对决定机械性能的因素缺乏基本的了解。此外，设计有助于提高电阻和能量耗散的构造块和接口也极具挑战性。当固定本征材料时，可以进一步调整机械和摩擦学性能。在这项研究中，氧化oxide纳米片被安排在互锁的上层结构中，以防止在结点处滑动，与由平行纳米片形成的传统的面对面超结构相比，从而增强了纳米片组件的机械性能。此外，通过证明采用无定形结构的有缺陷的晶体纳米片与单晶纳米片不同，可以揭示构件的晶体起源，前者具有优异的机械增强性能和改善的耐磨性。

更新日期：2020-09-15

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