Microstructure and mechanical properties of Mg-2.5Si-xCe in-situ particle reinforced composites prepared by rapid solidification process

Microstructure and mechanical properties of Mg-2.5Si-xCe in-situ particle reinforced composites prepared by rapid solidification process
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快速凝固工艺制备Mg-2.5Si-xCe原位颗粒增强复合材料的显微组织和力学性能

DOI:
10.1016/j.rinp.2019.102509
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发表时间:
2019-12
期刊:
影响因子:
5.3
通讯作者:
Tang Binbing
Tang Binbing
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Han Wenduo;Li Ke;Hu Fei;Li Yaohui;Tang Binbing

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采用快速凝固工艺制备了不同Ce含量的Mg-2.5Si-xCe合金。复合材料中形成了两种不同的原位相,即尺寸约为10 μm的粗大初生Mg 2Si相和尺寸小于400 nm的细小CeMg 2Si 2相。当Si和Ce元素的比例适当时,纳米CeMg 2Si 2相可以起到良好的增强体作用。压缩试验结果表明,随着Ce含量的增加,Mg-2.5Si-xCe合金的强度提高。复合材料力学性能的提高归因于Mg 2Si相的减少和纳米CeMg 2Si 2相的弥散强化。
In this study, Mg-2.5Si-xCe alloys with different Ce contents were fabricated by a rapid solidification process. Two different in-situ phases, namely coarse primary Mg2Si with a size of ∼10 μm and tiny CeMg2Si2with a size <400 nm, were formed and well dispersed in the composite matrix. Nanosized CeMg2Si2phases can act as excellent reinforcements when the appropriate ratio of Si and Ce elements was preset. The compressive test results showed that the strength of the samples (Mg-2.5Si-xCe) become stronger with increasing Ce content. The enhancement of the composite mechanical properties was attributed to the reduction of Mg2Si phases and the dispersion strengthening of the nanosized CeMg2Si2phases.
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DOI: --
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