電解法生產(chǎn)的細(xì)晶鋁錠的微觀組織和電化學(xué)行為研究.pdf

1、鄭州大學(xué)碩士學(xué)位論文電解法生產(chǎn)的細(xì)晶鋁錠的微觀組織和電化學(xué)行為研究姓名：孫海斌申請學(xué)位級別：碩士專業(yè)：材料物理與化學(xué)指導(dǎo)教師：左秀榮20060501鄭州火學(xué)碩士學(xué)位論文AbstractAbstractAluIninuma110yshavesuchcharacteristicsaslowdensi吼hi曲spec確cstrcn百haIldrigidity，sothat“isthesecondwidelyusedmetalmaterial，

2、andhavefoundawide印plicationinaemcmRandautomotiveindustriesItisthecmcialforthec印abilitiesofAla110ysthattIleg豫inoftheAIbasedalloy，andtitaniumisthecmcialgrainrefiningelementintheAlalIoys，thereforeWhichhavelowtitalli啪content

3、sarepmducedbydirectelectrolysiswimtheexisdngpurealuminumproductionfkilityandelec仃DIyticalsystem，whichcanrefine血e伊ainoftheA1alloysandimprovemec印abilitiesofAla110ysMicmcosInicstmcturesofGrain—refiIlingalumin啪ingota芏1dwithd

4、iⅡbrentmrce盯mcontentsareinvestigatedinordertoadvallcemec印abilitiesofGr血refiningalmin啪ingot，finallydeoxidizationactionsofelectroch鋤is仃yonTi4，La，in也ecathodearcinvestigatedbycyclicvol伽盥e廿yaIldc上lronopotemiome略11leresllltsar

5、ethat：Firstly，thegrainrefmemente珩ciencyofGrain—refiningaluIIlin啪ingot塒tlltitaIli啪conte：吐sisVeryobVious，andthegr擊nrefhlementefficiencyisimpmvedmTicontentsincrcasingWhenTicontentisO20％，merewillbe廿lebestrefinementemcicnc弘Se

6、condly，thee腩ctoftherefinemente珩ciencyonGm抽一refin協(xié)galumin啪ingotisobViouslyimpr0VedbytheaddmonofREintoGrain—rcflningalumin啪ingot，atmes蛐eTicontem(o01％)whenmecontemofREreachesO30％，thebeStrcfillingemciencycanbeobtained’butthe

7、re矗nmgemciencybeginstodecrease、vhenthecomentofREisinexcessofO30％REisalsoaIle飪bctiVemodi匆ingagem，whichmakesnleacemseFephasestransfo衄imoshonstickshapeinmegrainboundaryorsphercsh印ein廿lea—A1Withmecontents0fREincreasing，theq刪

8、tiesofspheresh印eFephasesin也eaAlincreaseREmodificationmechanismismatREentersintoFe(Si)imp嘶諺phaSes，fonllingcomplexcompo如ds(AlFesiR正)AtmesameTicoment(O01％)intheGrainrefiningal啪inumingot，meoptimuIllis10Ti／B，O1％REWhichisconfi

9、rnledbyQuadonhogonaltesta11dMixturedesignTh硼y，deoxidizationstepsofelectrochemistry0nTi4inthetungstenfn鋤entelectrodearetwostepsint11eNa3AlF6一AlF3一Ti02meItsaltsystem：thefirstst印isthatTi4isdeoxidizedintoTi2，mesecondst印ist11