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1、Mg基貯氫合金的摻雜和復(fù)合的實(shí)驗(yàn)研究摘要本文采用機(jī)械合金的制備方法對(duì)Ilg—Ti復(fù)合基貯氫合金作了一定的研究。利用機(jī)械合金化方法制備Mgz6Ti。Fe。Ni；(x=O，4，8，12)系列合金并對(duì)其儲(chǔ)氫性能進(jìn)行了系統(tǒng)的研究。隨著Ni取代Fe的量逐漸增加，合金吸放氫的滯后現(xiàn)象逐漸減小，合金M勖8Ti。。FesNi。顯示出了最高的吸放氫速率。Fe和Ni的共存有利于提高合金的儲(chǔ)氫性能。對(duì)于Mg。Ti。：FesNi。合金，隨著球磨的進(jìn)行合金的非晶化程度提高，但是非晶化程度的提高不利于提高合金的儲(chǔ)氫容量。鑒于合金Mg，。Ti，：FeJqi。優(yōu)于
2、其他合金的貯氫性能，本文又單獨(dú)對(duì)其貯氫性能做了分析，發(fā)現(xiàn)在PCT性能測(cè)試中40h球磨后合金159，6Ti。：FesNi。樣品有最高的吸氫速率、最低的吸放氫平臺(tái)壓及其差值，合金Mg，。Ti．。Fe。Ni。隨著球磨的進(jìn)行表現(xiàn)出了越來越好的放氫動(dòng)力學(xué)性能。利用機(jī)械合金化的方法制備M976-，Ti。：FesNi。B，(x=O，I，2，3，4)系列合金并對(duì)其儲(chǔ)氫性能進(jìn)行了系統(tǒng)的研究。B的加入降低了合金的吸氫溫度和吸放氫速率，使合金的吸放氫平臺(tái)有所上升，但其減小了吸放氫平臺(tái)差，降低了滯后現(xiàn)象。關(guān)鍵詞：儲(chǔ)氫合金；熱力學(xué)性能；儲(chǔ)氫性能,V-西大掌碩
3、士掌位論文ExperimentInvestigationonMg—basedHydrogenStorageAlloysABSTRACTHydrogenstoragealloyswouldplayaveryimportantroleinapplicationofhydrogenenergy．Amongallkindsofhydrogenstoragealloysstudiedpreviously，Mg-basedalloyisoneofthemostpromisinghydrogenstoragematerialsduetoitshi
4、曲hydrogenstoragecapacity，lightweight，lowpriceandfundamentalreserves．WehavesystematicallystudiedhydrogenstoragepropertiesoftheMg—Ticompoundedalloysystembyexperimentalresearch．M976Til2Fel2．xNix(x=0，4，8，12)alloyswerepreparedbymechanicalalloyingandthehydrogenstoragepropert
5、ieswereinvestigatedsystematically．ThehysteresisbetweenhydrogenabsorptionanddesorptiondecreasesgraduallywithincreasingtheamountofsubstitutionNiforFe．M976Tij2FesNi4showsthehighesthydrogenabsorptionanddesorptionrateamongM976Til2Fel2．xNi、(x=O，4，8，12)alloys．FeandNicoexisten
6、ceisfavorabletoimprovehydrogenstorageproperties．ForM976Til2FesNi4alloy,theamorphousdegreeincreasewiththemillingtime，andtheamorphousdegreeincreaseisunfavorabletoimproveIlg-西大掌碩士掌位論文hydrogenstoragecapacityInviewofgoodhydrogenstoragepropertiesofM976FesNi4Tilzalloy，thehydr
7、ogenstoragepropertiesofM976FesNi4Til2alloyseparatelyisanalyzed．Multipalcompoundbyball—millBandM976Til2FesNi4powdertogetherisparepared．ThesubstitutionBforMgcanlowthetemperatureofhydrogenabsorptionandslowdownthespeedofhydrogenabsorptionanddesorption．Theplateaupressureasc
8、endsandthehysteresisbetweenthehydrogenabsorptionanddesorptiondecreaseswiththeamountofsubstitutionBforMgincreasing，but
