Alloying effects of Ag on grain boundaries andalumina interfaces in copper a first principlespredictionAg对晶界地合金化作用 铜中地氧化铝界面：第一原理 预测.pdf

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1、RSCAdvancesViewArticleOnlinePAPERViewJournal

2、ViewIssueAlloyingeffectsofAgongrainboundariesandaluminainterfacesincopper:afirstprinciplesCitethis:RSCAdv.,2017,7,48230predictionabcbdededebabF.Teng,G.Q.Lan,Y.Jiang,*M.Song,S.J.Liu,C.P.WuandD.Q.YiThemechanicalpr

3、opertiesofoxidedispersion-strengthenedcopperarelargelydictatedbyitsinternalinterfaces,i.e.theoxideinterfacesandthegrainboundaries(GBs).Herewepresentasystematicfirst-principlesstudyforevaluatingthepotentialimpactofAgalloyingonadhesionofCu/a-Al2O3interfaces

4、andCugrainboundariesaswell.Theresultssuggestthat,incontrasttothestrongsegregationofSthatisalwaysdetrimental,AgonlyslightlysegregatestotheAl2O3interfaces,strengthenstheweakstoichiometricinterface,andslightlyweakensthestrongAl-richinterface.AgcannotpinSins

5、idetheReceived4thAugust2017matrix.Theco-segregationofAgwithSmodestlynegatesthedetrimentalinfluenceofSonadhesion,Accepted9thOctober2017butcanhardlyoccur.AgsegregationtomostoftheGBsisfoundalsotobeweak,andreducestheCreativeCommonsAttribution3.0UnportedLicenc

6、e.DOI:10.1039/c7ra08613jadhesionslightly.TheonlyoneexceptionisontheS9GB.Basedonthegainedinsights,wesuggestthatrsc.li/rsc-advancesAgalloyinghasonlylimitedbenefitsbutcanstillbeencouraged.1.Introductionsignicantlyaffectedbytraceamountofimpuritiesandalloyinge

7、lements.Thealuminadispersion-strengthenedcopper(ADSC)alloys,ItisknownfromtheliteraturethatSsegregationnotonlysignicantlydegradesthegrainboundaryadhesioninNi,2–4butalsocalledaluminaparticle-reinforcedcoppermatrixcompos-itesCu(Al2O3)p,haveexcellentcompreh

8、ensivepropertiesofalsoprovokesthespallationoftheprotectivealuminascalesThisarticleislicensedunderafromNiandFesubstrates.5–8Theso-called“sulfureffect”hashighelectrical/thermalconductanceandhighstrength.Theyarehighlyadvantageousforusesinmanyelectricalapplic

9、ationslongbeenofbothfundamentalandtechnologicalinteresttothematerialsresearchsociety.7–12Ourpreviousstudieshavesug-atelevatedtemperatures,suchaselectricalconnectors,spot-gested13,14thatSalsostronglysegregatestoCu/a-AlOinte