Double glow plasma carburization on zirconium to improve surface hardness and wear resistance

Though some important progress in the excel- lent mechanical properties of zirconium alloys have been reported, their high surface hardness and good wear prop- erties need to be explored further. In this work, a carbur- ized layer was formed on the surface of commercially pure zirconium by a double...

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Bibliographic Details
Published in:Rare metals 2017-07, Vol.36 (7), p.569-573
Main Authors: Wang, Jian-Qing, Yang, Hong-Bo, Zhang, Bing, Xi, Wei, Dong, Ze, Jing, Qin
Format: Article
Language:English
Subjects:
Biomaterials
Carburization (corrosion)
Chemistry and Materials Science
Diamond pyramid hardness
Diffraction patterns
Dispersion
Energy
Friction
Friction resistance
Graphite
Materials Engineering
Materials Science
Mechanical properties
Metallic Materials
Nanoscale Science and Technology
Physical Chemistry
Plastic deformation
Scanning electron microscopy
Wear resistance
Wear tests
X-ray diffraction
XRD分析
Zirconium alloys
Zirconium base alloys
Zirconium carbide
扫描电子显微镜
摩擦磨损试验
等离子渗碳
维氏硬度试验
耐磨性能
表面硬度
锆合金
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Summary:Though some important progress in the excel- lent mechanical properties of zirconium alloys have been reported, their high surface hardness and good wear prop- erties need to be explored further. In this work, a carbur- ized layer was formed on the surface of commercially pure zirconium by a double glow plasma hydrogen-free car- burizing technique. Commercial high-purity graphite was used as the carbon source material. X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dis- persive spectroscopy （EDS）, Vickers hardness test, friction and wear test were used to characterize the samples car- burized. The carburized layer could be clearly observed under a microscope. XRD patterns indicate that the zirco- nium carbide phase is formed in the carburized layer. The surface hardness of the sample increases significantly after carburization. Friction and wear tests results show that wear resistance and friction coefficient of zirconium are improved considerably after carburization. Surface plastic deformation is arrested to a low extent in contrast with pure zirconium because of the presence of ZrC phases during the wear test. The results may provide new insight into methods for surface strengthening of zirconium alloys.
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-016-0748-x