鎂基儲氫合金的制備及其性能研究.pdf

1、重慶大學(xué)碩士學(xué)位論文鎂基儲氫合金的制備及其性能研究姓名：唐體春申請學(xué)位級別：碩士專業(yè)：材料科學(xué)與工程指導(dǎo)教師：陳玉安20070401重慶大學(xué)碩士學(xué)位論文英文摘要ABSTRACTTheproblemsofenvironmentandenergysourceswereregardedatpresent，therefore，thehydrogenenergywasfavoredbythescientistsalloverthewoddbeca

2、useofitscleannessAsthestorageandtransportationmediumofhydrogenthehydrogenstoragematerialsresearchbecameaverypopitemForthegreathydrogenstoragecapacitylowdensityandinexpensivevalue，theMgbasedhydrogenstoragematerialsweretho

3、ughtaSthemostpromisingonebutitsthermodynamicsandkineticspropertiesinhydrogenabsorbingprocesswereworseandit’SantierodibilityinlyewasbadtooInthisstudythreekindsofMgbasedhydrogenstorage(M92Ni，Mg—A1一NiseriesandMgNi—Cuseries)

4、werepreparedbytwostepmethod(engineactivationandsinterinsolid)，andthreekindsofalloys(M92Ni，MgA1NiandMgNi—Cuseries)weresynthesizedbymechanicalalloyingAfterthat，XRD，SEM，mierostrueture，granularityelectrochemistrypropertiesan

5、dhydrogenationproperties(includingtheabsorptionvelocityadl“VeabsorptionanddesorptionPCTcalrvesofsamples)analysiswereemployed，theresultsshowedthat：①5kindsofalloys(M92Ni，MgA1Niseries、Mg—Ni—Cuseries)Canbesynthesizedbytwoste

6、pmethodXRDresultsshowedthatallthealloys’mainphasewasM92Ni，andtheotherhydrogenstoragephase(M93AINi2)wasalsofoundinMgA1Nialloys，atthesametimethehydrogenstoragephase(M92Cu)WasalsofoundinMgNi—CualloysThehydrogenstorageanalys

7、isindicatedthattheM92Nialloys’hydrogenstoragepropertiesWas252wt％at400。CItscyclestabilitieswerebadTheanalysisshowedthatthesubstitutionofMgbyA1andthesubstitutionofNibyCucanimprovethealloys’cyclestabilitiespropertiesThedeso

8、rptionratiowasincreasedto70％②6kindsofalloys(M92Ni，MgA1Niseries、MgNiCuseries)CanbeproducedbymechanicalalloyingXRDresultsshowedthatthesixkindsofalloys’mainphasewereM92Ni，andtheotherhydrogenstoragephase(M93AlNi2)wasalsofoun

9、dinMgA1Nialloys，atthesalnetimethehydrogenstoragephase(CunMgloNi9)WaSalsofoundinMgNiCualloysThehydrogenstorageanalysisshowedthatthealloysproducedbymechanicalalloyingCanabsorbhydrogenatlowertemperatureTheM92Nialloys’hydrog