Microstructures and mechanical properties of niobium coatings on depleted uranium

被引：0

作者：

Wang Q. ^{[1
]}

Chen L. ^{[1
]}

Zhang P. ^{[2
]}

Lan L. ^{[1
]}

Lang D. ^{[1
]}

Xia Y. ^{[1
]}

机构：

[1] China Academy of Engineering Physics

[2] National Key Laboratory for Surface Physics and Chemistry

来源：

Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | 2010年 / 30卷 / 05期

关键词：

Depleted Uranium; Mechanical property; Microstructure; Niobium coating;

D O I：

10.3969/j.issn.1672-7126.2010.05.02

中图分类号：

学科分类号：

摘要：

The niobium coatings were deposited by magnetron sputtering ion plating on depleted uranium substrates. The impacts of the deposition conditions on its properties were studied. The microstructures and mechanical properties were characterized with X-ray diffraction, scanning electron microscopy and conventional mechanical probes. The results show that the fairly dense and compact Nb coating, with columnar-structured nano-grains and high density of defects, significantly increases the corrosion resistance of the uranium and reduce the radiation pollution. The Nb coating with optimized mechanical properties, such as an elastic module of 195.1 GPa, a nano-hardness of 12.9 GPa, and a friction coefficient of 1.0, was deposited at a pulsed bias voltage of -500 V. Moreover, elastic and plastic deformations of the Nb coatings were also observed.

引用

页码：464 / 469

页数：5

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