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Preparation and characterization of superhard AlB2-type WB2 nanocomposite coatings
C. L. Jiang; Z. L. Pei; Y. M. Liu; J. Q. Xiao; J. Gong; C. Sun
2013
Source PublicationPhysica Status Solidi a-Applications and Materials Science
ISSN1862-6300
Volume210Issue:6Pages:1221-1227
AbstractWB2 nanocomposite coatings were synthesized by dc magnetron sputtering. The morphology, chemical composition, chemical bonding state, microstructure, hardness, and tribological properties were investigated. The columnar-structured coatings are dense and uniform. The as-deposited coatings were found to have a metastable AlB2-type structure as characterized by X-ray diffraction and further confirmed by high-resolution transmission electron microscopy. Coatings exhibit superhardness about 43.2 +/- 5GPa (taken from the plateau region) obtained by nanoindentation. In addition, the steady-state friction coefficient mu=0.23 and wear rate K=6.5x10-6mm3N-1m-1 were obtained under dry sliding condition in ambient environments. These characteristics indicate AlB2-type WB2 coatings have high potential application as superhard and low wear coatings. Moreover, the AlB2-type WB2 can hardly be prepared using the conventional powder metallurgy technology without high pressure, and this study proposes a new practical approach to prepare it.
description.department[jiang, chunlei ; pei, zhiliang ; liu, yanming ; xiao, jinquan ; gong, jun ; sun, chao] chinese acad sci, inst met res, sklcp, shenyang 110016, peoples r china. ; sun, c (reprint author), chinese acad sci, inst met res, sklcp, shenyang 110016, peoples r china. ; csun@imr.ac.cn
KeywordHardness Magnetron Sputtering Metastable Phases Superhard Coatings Wb2 Tungsten Tetraboride Rhenium Diboride Phase-transition Metal Borides Pressure System
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71281
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
C. L. Jiang,Z. L. Pei,Y. M. Liu,et al. Preparation and characterization of superhard AlB2-type WB2 nanocomposite coatings[J]. Physica Status Solidi a-Applications and Materials Science,2013,210(6):1221-1227.
APA C. L. Jiang,Z. L. Pei,Y. M. Liu,J. Q. Xiao,J. Gong,&C. Sun.(2013).Preparation and characterization of superhard AlB2-type WB2 nanocomposite coatings.Physica Status Solidi a-Applications and Materials Science,210(6),1221-1227.
MLA C. L. Jiang,et al."Preparation and characterization of superhard AlB2-type WB2 nanocomposite coatings".Physica Status Solidi a-Applications and Materials Science 210.6(2013):1221-1227.
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