Abnormal hardness behavior of Cu-Ta films prepared by magnetron sputtering

Abnormal hardness behavior of Cu-Ta films prepared by magnetron sputtering
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磁控溅射Cu-Ta薄膜的异常硬度行为

DOI:
10.1016/j.jallcom.2017.03.106
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发表时间:
2017-06
影响因子:
6.2
通讯作者:
Zhou Lingping
Zhou Lingping
中科院分区:
材料科学2区
文献类型:
--
作者:
Qin Wen;Fu Licai;Xie Tianle;Zhu Jiajun;Yang Wulin;Li Deyi;Zhou Lingping

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研究了溅射沉积Cu-Ta薄膜的显微结构、纳米压痕硬度。由于Ta的高硬度,Cu-Ta薄膜的硬度随Ta含量的增加而增加,但在20 at.%范围内有一个平台≤ 60 at.% Ta与非晶结构有关。这一反常行为表明,Cu-Ta薄膜的硬度与非晶结构中的合金元素含量无关。随着Ta含量的增加,非晶组织中原子间距离的增加抵消了Ta对Cu-Ta硬化的诱导作用。因此,这种相反的效果使硬度平台。
The microstructure, nanoindentation hardness of the sputtering deposited Cu-Ta films were investigated. Because of high hardness of Ta, the hardness of Cu-Ta films increases with Ta content, except for a platform in the range of 20 at.% ∼60 at.% Ta that being related to the amorphous structure. This abnormal behavior presents that the hardness of Cu-Ta films is independent of alloy elemental content in the amorphous structure. The Ta addition inducing to Cu-Ta hardening is counteracted by the increase of inter-atomic distance in the amorphous structure with increasing of Ta. So this opposite effect makes the hardness platform.
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