Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/78956
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dc.contributor.authorXu, J.-
dc.contributor.authorLi, Z.-
dc.contributor.authorXie, Z.-
dc.contributor.authorMunroe, P.-
dc.contributor.authorLu, X.-
dc.contributor.authorLan, X.-
dc.date.issued2013-
dc.identifier.citationApplied Surface Science, 2013; 270:418-427-
dc.identifier.issn0169-4332-
dc.identifier.urihttp://hdl.handle.net/2440/78956-
dc.description.abstractIn this study, novel MoSi 2 -based nanocomposite coatings were deposited on Ti-6Al-4V substrates by a two-step process involving firstly, deposition of MoSi 2 -based coatings, using a double cathode glow discharge process and, secondly, plasma nitridation of the as-deposited coatings. The aim of this latter step is to introduce nitrogen into the coating and promote the formation of amorphous silicon nitride. The resulting coatings were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). It was found that the nanocomposite coatings were composed of nanocrystallite Mo 5 Si 3 and MoSi 2 grains embedded in an amorphous Si 3 N 4 matrix. The mechanical properties and damage resistance of the coatings were evaluated by both Vickers indentation and nanoindentation techniques. Dry sliding wear tests were performed using a ball-on-disc type tribometer, in which the coated samples were tested against a ZrO 2 ceramic ball at normal loads of 2.8 and 4.3 N under ambient conditions. Compared with the monolithic MoSi 2 nanocrystalline coating, the specific wear rates of the nanocomposite coatings decreased by an order of magnitude. The specific wear rate was further improved by about 20% through the addition of Al, which was attributed to an optimum combination of mechanical properties. © 2013 Elsevier B.V.-
dc.description.statementofresponsibilityJiang Xua, Zhengyang Li, Zong-Han Xie, Paul Munroe, Xiao Lin Lu, Xiu Feng Lan-
dc.language.isoen-
dc.publisherElsevier Science BV-
dc.rightsCopyright © 2013 Elsevier B.V. All rights reserved.-
dc.source.urihttp://dx.doi.org/10.1016/j.apsusc.2013.01.041-
dc.subjectNanocomposites-
dc.subjectMechanical properties-
dc.subjectWear-
dc.subjectCoatings-
dc.titleNovel high damage-tolerant, wear resistant MoSi2-based nanocomposite coatings-
dc.typeJournal article-
dc.identifier.doi10.1016/j.apsusc.2013.01.041-
pubs.publication-statusPublished-
Appears in Collections:Aurora harvest
Mechanical Engineering publications

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