Age-hardening in a two component immiscible nanolaminate metal system

Age-hardening in a two component immiscible nanolaminate metal system
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二元不混溶纳米层压金属系统中的时效硬化

DOI:
10.1016/j.scriptamat.2017.03.037
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发表时间:
2017
期刊:
影响因子:
6
通讯作者:
Bahr, David F.
Bahr, David F.
中科院分区:
材料科学1区
文献类型:
--
作者:
Kim, Chang-Eun;Rahimi, Raheleh M.;Maxwell, Tyler L.;Balk, T. John;Bahr, David F.

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用密度泛函理论预测了铬在铜中的扩散和析出。铬在铜中扩散的势垒与铬的自扩散势垒相当,高于铜的自扩散势垒。模拟结果支持实验测量的30纳米厚的铬/铜-3.4%铬纳米层的硬度。镀态薄膜的硬度为6.25 GPa.在373K时,薄膜的硬度降至5.95 GPa,而在573K时,薄膜的硬度提高到6.6 GPa.透射电子显微镜显示,由于降水,存在明显的局部应变,这与理论预测一致。
Density functional theory was used to predict the diffusion and precipitation of Cr in Cu. The energy barrier of Cr diffusion in Cu is comparable to the self-diffusion of Cr, and higher than the energy barrier of Cu self-diffusion. The simulations support the experimentally measured hardness of 30 nm thick nanolaminate layers of Cr/Cu-3.4%Cr. As-deposited films had a hardness of 6.25 GPa; annealing at 373 K decreased hardness to 5.95 GPa, while annealing at 573 K increased the hardness to 6.6 GPa. Transmission electron microscopy indicates there is significant local strain due to precipitation, in agreement with theoretical predictions.
DOI: --
发表时间: 2013
期刊:
影响因子: --
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发表时间: 2015
期刊: Acta Materialia
影响因子: 9.4
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