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1、Availableonlineatwww．sciencedirect．cornTransaetionsof-：；：，ScienceDirectNonferrousMetalsSocietyofChinaTrans．NonferrousMet．Soc．China22(201211831—1838WWW．tnmsc．cnMicrostructureandhydrogenstoragepropertiesofas—castandrapidlysolidifiedTi—richTi———ValloysSuwamoSUW
2、ARNO，JanKetilSOLBERG，JanPetterMAEHLEN，BenteKROGH，BorreToreBORRESEN，EstherOCHOA—FERNANDEZ，ErlingRYTTER，MarioWILLIAMS，RomanDENYS，VolodymyrA．YARTYS，1．DepartmentofMaterialsScienceandEngineering，NorwegianUniversityofScienceandTechnology，NO一7491．Trondheim．Norway；2
3、．InstituteforEnergyTechnology，P．O．Box40，NO一2027，Kjeller，Norway；3．StatoilResearchCentre，Rotvoll，N．7005，Trondheim，Norway；4．UniversityoftheWestemCape，PrivateBagX17，Bellville，7535，SouthAfricaReceived10November2011：accepted25June2012Abstract：Thegoalofthepresentwo
4、rkwastooptimizethephase—structuralcompositionandmicrostructureofbinaryTi0809Vo2-01．a(chǎn)lloyswithrespecttotheirhydrogensorptionproperties．Applicationofthesealloysisforhydrogenabsorptionfromgaseousmixturescontainingsubstantialamountsofcarbonmonoxide(CO)athightemp
5、eratures．Irespectiveofalloycomposition，botha(HCP)and／~(Bcc)phasesinTi08—09V02—01formedsinglephaseFCChydridesuponhydrogenationinpureH2．AninsitusynchrotronX—raydiffractionstudyshowedthatonlythefl-phasetransformedtothecorrespondinghydridewhenthealloywashydrogen
6、atedinamixtureofH2+10％CO．Rapidsolidification(RS)ofthealloyresultedinrefinedgrainsizesbothintheTi08V0．2andTi09V01alloys．Furthermore，RSwasfoundtoincreasethe一phasefractioninTio9V0l，beingtwicelargerthanthatoftheas—castalloy．Tio9V0lhadaplatelikemicrostructureasob
7、servedbyscanningelectronmicroscopy(SEM)，theplateswereabout300nrnthick．ThemicrostructurerefinementresultedinafasterkineticsofHdesorptionasobservedbytemperaturedesorptionspectroscopy(TDS)．Keywords：hydrogenstorage；Ti——Valloys；rapidsolidification；synchrotronX—ra
8、ydiffraction；carbonmonoxidesuchashighenergybal1millingoftwoelements。has1Introductionalsobeenemployedtoproducethealloys[4—6]．Theas—castTil—ValloyscanbehydrogenatedafteractivationThehydrogenstorag
