Damage behavior of heterogeneous magnesium matrix nanocomposites

Damage behavior of heterogeneous magnesium matrix nanocomposites
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异质镁基纳米复合材料的损伤行为

DOI:
10.1557/mrc.2020.35
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发表时间:
2020-06
期刊:
影响因子:
1.9
通讯作者:
An Linan
An Linan
中科院分区:
材料科学4区
文献类型:
--
作者:
Luo Xi;He Xu;Liu Jinling;Zhu Xinxin;Jiang Song;Zhao Ke;An Linan

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异质镁基纳米复合材料(Hetero-Mg-NCs)表现出优异的强度-韧性协同作用,但其损伤行为和韧性机制缺乏研究。在这里,原子力显微镜首次被用来表征压痕后异质镁纳米颗粒的微观结构演变和损伤行为。静电力显微镜揭示了由纯镁区域(软相)和镁纳米复合材料区域(硬相)组成的异质结构。此外,还以高分辨率研究了变形区域的表面形貌和裂纹。结果表明,软相承担了大部分变形,并且在捕获和钝化裂纹方面发挥了重要作用。
Heterogeneous magnesium matrix nanocomposites (Hetero-Mg-NCs) exhibited excellent strength-toughness synergy, but their damage behavior and toughness mechanism lacked of investigation. Here, atomic force microscopy was first employed to characterize the microstructure evolution and damage behavior of the Hetero-Mg-NCs after indentation. The heterogeneous structure comprised of pure Mg areas (soft phase) and Mg nanocomposite areas (hard phase) was revealed by the electrostatic force microscopy. Furthermore, the surface morphology and cracks of the deformed area were investigated with high resolution. The results indicated the soft phase undertook most of the deformation and played an important role in capturing and blunting the crack.
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