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dc.contributor.authorZhai, Fuqiang
dc.contributor.authorPineda Soler, Eloi
dc.contributor.authorDuarte, Maria Jazmin
dc.contributor.authorCrespo Artiaga, Daniel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física Aplicada
dc.date.accessioned2015-02-12T18:15:52Z
dc.date.available2016-08-15T00:30:53Z
dc.date.created2014-08-15
dc.date.issued2014-08-15
dc.identifier.citationZhai, F. [et al.]. Role of Nb in glass formation of Fe-Cr-Mo-C-B-Nb BMGs. "Journal of alloys and compounds", 15 Agost 2014, vol. 604, p. 157-163.
dc.identifier.issn0925-8388
dc.identifier.urihttp://hdl.handle.net/2117/26326
dc.description.abstractA new Fe-based bulk metallic glass with superior glass-forming ability (GFA), Fe46Cr15Mo14C15B6Nb4, was developed based on the Fe-Cr-Mo-C-B alloy system by minor addition of Nb. The effects of Nb addition on glass formation of the Fe-50 xCr15Mo14C15B6Nbx (x = 0, 2, 4 and 6 at.%) alloys were investigated. The optimum addition content of Nb was determined as 4 at.% by X-ray diffraction and differential scanning calorimeter analysis. A fully amorphous rod sample with 3 mm in diameter was produced by using commercial-grade raw materials and a copper mold casting technique. This alloy shows an ultimate compressive strength of 1920 MPa and Vicker's hardness 1360 H-V, which is two to three times that of conventional high strength steel and suggests a promising potential for applications combining outstanding corrosion and wear resistance properties. The crystallization kinetics studies found that the activation energies for glass transition, onset of crystallization and crystallization peak were higher than those of other reported Fe-based bulk metallic glasses. The value of the fragility parameter m for the Fe46Cr15Mo14C15B6Nb4 alloy was calculated to be 34, indicating that the Fe-Cr-Mo-C-B-Nb alloy system is a strong glass former according to the Angell's classification scheme. It is inferred that the more sequential change in the atomic size, the generation of new atomic pairs with large negative heats of mixing and the amount of oxygen in the molten liquid neutralized into Nb oxides provide a synergetic effect for the remarkably improved GFA and thermal stability. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent7 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química física
dc.subject.lcshMetallic glasses
dc.subject.lcshAmorphous materials
dc.subject.lcshX-rays - Diffraction
dc.subject.otherFe-based amorphous alloy
dc.subject.otherMinor addition
dc.subject.otherNb
dc.subject.otherActivation energy
dc.subject.otherGlass-forming ability
dc.subject.otherBULK METALLIC-GLASS
dc.subject.otherHIGH CORROSION-RESISTANCE
dc.subject.otherSOFT-MAGNETIC PROPERTIES
dc.subject.otherCRITICAL COOLING RATE
dc.subject.otherFORMING ABILITY
dc.subject.otherAMORPHOUS-ALLOYS
dc.subject.otherSUPERCOOLED LIQUID
dc.subject.otherCRYSTALLIZATION KINETICS
dc.subject.otherMECHANICAL-PROPERTIES
dc.subject.otherDEFORMATION-BEHAVIOR
dc.titleRole of Nb in glass formation of Fe-Cr-Mo-C-B-Nb BMGs
dc.typeArticle
dc.subject.lemacSubstàncies amorfes
dc.subject.lemacRaigs X -- Difracció
dc.contributor.groupUniversitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
dc.identifier.doi10.1016/j.jallcom.2014.03.095
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0925838814006835
dc.rights.accessOpen Access
drac.iddocument14935148
dc.description.versionPostprint (published version)
upcommons.citation.authorZhai, F.; Pineda, E.; Duarte, M.J.; Crespo, D.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameJournal of alloys and compounds
upcommons.citation.volume604
upcommons.citation.startingPage157
upcommons.citation.endingPage163


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