简介：Ｘ－ｒａｙＤｏｕｂｌｅ－ｃｒｙｓｔａｌＤｉｆｆｒａｃｔｏｍｅｔｅｒｗｉｔｈＨｏｒｉｚｏｎｔａｌＳｌｉｔｓａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎｓＸｕＪｉｎｇｙａｎｇａｎｄＺｈｕＮａｎｃｈａｎｇ徐景阳，朱南昌（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｌｅｏｆＭｅｔａ...

简介：X-raydiffraction(XRD)anddifferentialscanningcalorimetry(DSC)wereusedtoinvestigatethecrystallizationprocessofamorphousAl90TMxCe10-x(atomfractionin%;TM=FeorNi;x=3,5)alloys.AgingeffectswereexaminedbyX-raydiffraction.ThestructurecorrespondingtotheprepeakfortheamorphousAl90Fe5Ce5alloyismorestablethantheamorphousmatrix,butitisnotstableforamorphousAl90Ni5Ce5alloyduringthefirstcrystallizationstageandevendecomposesatroomtemperature.AlthoughbothAl-NiandAl-Fehavestrongchemicalbonding,thecrystallizationonsettemperatureofamorphousAl-Fe-CealloysismuchhigherthanthatofamorphousAl-Ni-Cealloys,whichislikelycausedbythedifferentstabilityofthestructurecorrespondingtotheprepeak.ThecrystallizationonsettemperatureincreasesasCe/NiratioincreasesinamorphousAl90NixCe10-xalloys,whereasitdecreasesasCe/FeratioincreasesinamorphousAl90FexCe10-xalloys.AbetteratomicpackingproducesasCecontentincreasesbecauseofthesizemismatchinAlNi-CesystemsandasFecontentincreasesbecauseoftheincreasingFecentralstructuralunits.

简介：ＳｉｌｉｃｏｎＥｐｉｔａｘｉａｌＷａｆｅｒｆｏｒＸＢａｎｄＤｏｕｂｌｅＲｅａｄ－ｔｙｐｅＤＤＲＩＭＰＡＴＴＤｉｏｄｅｓｂｙＡｔｍｏｓｐｈｅｒｅ／ＬｏｗＰｒｅｓｓｕｒｅＧｒｏｗｔｈＴｅｃｈｎｉｑｔＷａｎｇＸｉａｎｇｗｕａｎｄＬｕＣｈｕｎｙｉ王向武，陆春...

简介：ThestructureandelectrochemicalpropertiesofanewlowcobalthydrogenstorageelectrodealloysLa1-xLixNi3.2Co0.3Al0.3(0≤x≤0.2)wereinvestigatedwithadifferentadditionsofLiinreplacementofLa.WiththeincreaseofLicontentsthemaximumdischargecapacityincreasesfrom240mAh·g-1(x=0)to328.4mAh·g-1(x=0.1)andthecyclestabilityisimprovedcorrespondingly.ThecapacitydecaycanremaiN28.6%(x=0.2)after230charge/dischargecycles.Thehighratedischarge(HRD)abilityofthealloys(x≤0.1)isimprovedandthebestHRDis34.1%(x=0.1)underthedischargecurrentdensity1200mA·g-1.ItisfoundthatthepreparedalloysarebasicallycomposedofLaNi5asmatrixphaseandLaNi3assecondphase(x≤0.1).ButtheabundanceofLaNi3phasedramaticallydecreaseswithincreasingx.Whenx=0.2,anewphaseAl(NiCo)3isformed.