Application of electron backscatter diffraction to the study of phase transformations英文文献资料

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1、ApplicationofelectronbackscatterdiffractiontothestudyofphasetransformationsA.F.Gourgues-Lorenzon*Theapplicationoftheelectronbackscatterdiffractiontechniquetotheinvestigationofphasetransformationsisreviewed.Thewidevarietyofresultsobtainedusingthistechniqueisillustra

2、tedanddiscussed,focusingonthermodynamicsandkineticsofphasetransformations,solidification,solidstatephasetransformations,environmentallyassistedreactionsandthinfilmdeposition.Emphasisisalsoplacedontworapidlygrowingdevelopments:couplingelectronbackscatterdiffractionw

3、ithadvancedexperimentaltechniquesandwithmoreandmorecomplexmodellingofphasetransformationsandofresultingmaterialproperties.Keywords:Electronbackscatterdiffraction,Scanningelectronmicroscopy,PhasetransformationsListofabbreviationsandsymbolsIntroductionACOMautomatedcr

4、ystalorientationmeasurementsTheelectronbackscatterdiffraction(EBSD)technique,bccbodycentredcubic(crystalstructure)alsotermedautomatedcrystalorientationmeasure-BKDPbackscatterKikuchidiffractionpatternments(ACOM),orientationimagingmicroscopyCETcolumnartoequiaxedtrans

5、ition(solidification)(OIM)andtheBackscatterKikuchidiffractionpatternEBSDelectronbackscatterdiffraction(BKDP)technique,isutilisedtodeterminethelocalEDXenergydispersiveX-rayspectrometrycrystalstructureandorientationofmaterials.Itmakesfccfacecentredcubic(crystalstruct

6、ure)fulluseoftheversatilityandmultiscalecapabilityoftheFEGfieldemissiongunscanningelectronmicroscope(SEM).TheprinciplesandFIBfocusedionbeamapplicationsofthetechniquecanbefoundelsewhereGBgrainboundary(e.g.Schwartz,2000;Dingley,2004)andwillbeonlyGBEgrainboundaryengin

7、eeringshortlyrecalledhere.Beforeleavingthematerial,HABhighangleboundarybackscatteredelectronsdiffractatcrystallatticeplanesHAZheataffectedzone(welding)intheprobearea.Theyaretheninterceptedbyahcphexagonalclosepacked(crystalstructure)phosphorscreen(Fig.1).OwingtoBrag

8、gdiffractionHOLZhigherorderLau¨ezoneconditionsandtothesampletoscreendistance,bandsKSKurdjumovSachs(seeAppendix)centredondiffractingplanesareobser