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Branaganetal.DevelopingBMNintoindustrialproducts

a bresutilisedinconcreteundergoingthree-pointbendtesting;bhoneycombstructuresmadefromfoil;cbidirectionalhybridfabric;dfabricmadebyweavinghybridSGMMfoilaramidyarn7ExamplesofproductformswithSGMM

structure

pathwaysforfuturedevelopmentareanticipated.Inpathwayone,asshowninFig.8b,thespinodaldecom-positionisdecoupledfromtheglassdevitri cationprovidingalargeprocesswindow.However,thisneces-sitateslowtemperaturesforspinodaldecompositiontransformation,whichmaynotallowsuf cientdiffusionduringtheinitialcooling.InFig.8c,asecondpathwayisanticipatedwherebythespinodaldecompositionremainscoupledtotheglassdevitri cationtransformation.Inthiscase,thereisanarrowprocesswindowtoformthetargetedSGMMstructuredirectly,butitmaybedevelopedthroughoverquenchingandthencarefulannealingthroughthespinodaldecompositiontransfor-mationwhileavoidingdevitri cationoftheglassmatrix.

Conclusions

TheNanoSteelCompanyhasbeenapplyingBMNasamainstreamtechnologyforamultitudeofrealworld

industrialapplicationsforoveradecade.Speci cnewstrategiesforthecommercialexploitationofthisnovelclassofmaterialshavebeendevelopedonthebasisoftheinherentmaterialpropertiesandresultingchallengesfortheapplication.Forsurfacetechnologyapplications,glassformingalloyscanbeappliedasacoating,andtheresultingmetallicglassstructurecanbedevitri edtodevelophighwear,abrasion,erosionandcorrosionresistanceandenabledbyhighsystemtoughness.Formonolithictechnologyapplications,devitri cationofthemetallicglassprecursormustbeavoided,andthedevelopmentofaspeci cmicrostructuralconstituent,SGMM,isfoundtobeenablingfortheachievementofglobalplasticityandinherentmaterialtoughnessneces-saryforstructuralapplications.Challengesyetremainespeciallyinforminghightensilestrength(.2GPa)thick(.1mm)industrialproductsincorporatingtheSGMM

structure.

athinmonolithic;bpotentialpathway1;cpotentialpathway2

8ModelCCTdiagramstoallowtechnologicalexploitationofSGMMstructuresatincreasingthickness

1198MaterialsScienceandTechnology2013

VOL

29

NO

10